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What is the correct way to screw wall and ceiling drywalls? 2nd Edition. Fortify SCA is used to find and fix following software vulnerabilities at the root cause: Buffer Overflow, Command Injection, Cross-Site Scripting, Denial of Service, Format String, Integer Overflow, (Java) and to compare it with existing bug reports on the tool to test its efficacy. But the stream and reader classes do not consider it unusual or exceptional if only a small amount of data becomes available. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. "Writing Secure Code". The program might dereference a null-pointer because it does not check the return value of a function that might return null. Extended Description NULL pointer dereference issues can occur through a number of flaws, including race conditions, and simple programming omissions. Fortify Software in partnership with FindBugs has launched the Java Open Review (JOR) Project. Use automated static analysis tools that target this type of weakness. Penticton Regional Hospital Diagnostic Imaging, "Seven Pernicious Kingdoms: A Taxonomy of Software Security Errors". This table specifies different individual consequences associated with the weakness. An awesome tip to avoid NPE is to return empty When it comes to these specific properties, you're safe. More specific than a Pillar Weakness, but more general than a Base Weakness. 2.1. These classes simply add the small amount of data to the return buffer, and set the return value to the number of bytes or characters read. A null-pointer dereference takes place when a pointer with a value of NULL is used as though it pointed to a valid memory area. ssh component for Go allows clients to cause a denial of service (nil pointer dereference) against SSH servers. What's the difference between a power rail and a signal line? Network monitor allows remote attackers to cause a denial of service (crash) via a malformed RADIUS packet that triggers a null dereference. In the following example, it is possible to request that memcpy move a much larger segment of memory than assumed: If returnChunkSize() happens to encounter an error it will return -1. "Automated Source Code Reliability Measure (ASCRM)". Instead use String.valueOf (object). These relationships are defined as ChildOf, ParentOf, MemberOf and give insight to similar items that may exist at higher and lower levels of abstraction. To learn more, see our tips on writing great answers. <, [REF-1031] "Null pointer / Null dereferencing". public class MyClass {. Agissons ici, pour que a change l-bas ! [A-Z a-z 0-9]*$")){ throw new IllegalArgumentException(); } message.setSubject(subject) This still gets flagged by Fortify. Expressions (EXP), https://samate.nist.gov/SSATTM_Content/papers/Seven%20Pernicious%20Kingdoms%20-%20Taxonomy%20of%20Sw%20Security%20Errors%20-%20Tsipenyuk%20-%20Chess%20-%20McGraw.pdf, https://www.microsoftpressstore.com/store/writing-secure-code-9780735617223, Cybersecurity and Infrastructure Security Agency, Homeland Security Systems Engineering and Development Institute, Detect and handle standard library errors, The CERT Oracle Secure Coding Standard for Java (2011), Provided Demonstrative Example and suggested CERT reference, updated Common_Consequences, Relationships, Other_Notes, Taxonomy_Mappings, updated Background_Details, Demonstrative_Examples, Description, Observed_Examples, Other_Notes, Potential_Mitigations, updated Common_Consequences, Demonstrative_Examples, References, updated Demonstrative_Examples, Potential_Mitigations, References, updated Demonstrative_Examples, References, updated Common_Consequences, Demonstrative_Examples, Relationships, Taxonomy_Mappings, updated Common_Consequences, References, Relationships, updated Demonstrative_Examples, Potential_Mitigations, updated Demonstrative_Examples, Relationships, Taxonomy_Mappings, updated Applicable_Platforms, References, Relationships, Taxonomy_Mappings, updated References, Relationships, Taxonomy_Mappings, updated Demonstrative_Examples, Observed_Examples, Relationships, Weakness_Ordinalities. Object obj = new Object (); String text = obj.toString (); // 'obj' is dereferenced. is incorrect. NULL pointer dereference issues can occur through a number of flaws, including race conditions, and simple programming omissions. If there is a more properplace to file these types of bugs feel free to share and I'll proceed to file the bug there. 5.2 (2018-02-26) Fix #298: Fortify Issue: Unreleased Resource; Fix #286: HTML 5.0 Report: Add method and class of the failing test; Fix #287: Add cite:testSuiteType earl property to identify the test-suite is implemented using ctl or testng. large number of packets leads to NULL dereference, packet with invalid error status value triggers NULL dereference, Chain: race condition for an argument value, possibly resulting in NULL dereference. This Android application has registered to handle a URL when sent an intent: The application assumes the URL will always be included in the intent. Cross-Site Flashing. If an attacker can force the function to fail or otherwise return a value that is not expected, then the subsequent program logic could lead to a vulnerability, because the product is not in a state that the programmer assumes. vegan) just to try it, does this inconvenience the caterers and staff? How to will fortify scan in eclipse Ace Madden. Implementation: Proper sanity checks at implementation time can More information is available Please select a different filter. "Seven Pernicious Kingdoms: A Taxonomy of Software Security Errors". Connect and share knowledge within a single location that is structured and easy to search. Null-pointer exceptions usually occur when one or more of the programmer's assumptions is violated. Most errors and unusual events in Java result in an exception being thrown. Expressions (EXP), SEI CERT C Coding Standard - Guidelines 03. Dereferencing follows the memory address stored in a reference, to the place in memory where the actual object resides. Removed issues. Convert byte[] to String (text data) The below example convert a string to a byte array or byte[] and vice versa. Whenever we use the "return early" code pattern, Fortify is not able to understand it and raises a "possible null dereference" warning. It is not uncommon for Java programmers to misunderstand read() and related methods that are part of many java.io classes. Why is this sentence from The Great Gatsby grammatical? The Likelihood provides information about how likely the specific consequence is expected to be seen relative to the other consequences in the list. 2006. When an object has been found, the requested method is called ( toString in this case). View - a subset of CWE entries that provides a way of examining CWE content. If all pointers that could have been modified are sanity-checked previous to use, nearly all NULL pointer dereferences can be prevented. PVS-Studio is a tool for detecting bugs and security weaknesses in the source code of programs, written in C, C++, C# and Java. Class level weaknesses typically describe issues in terms of 1 or 2 of the following dimensions: behavior, property, and resource. For example, if a coder subclasses SecureRandom and returns a non-random value, the contract is violated. The following function attempts to acquire a lock in order to perform operations on a shared resource. If you preorder a special airline meal (e.g. Copyright 20062023, The MITRE Corporation. When this method is called by a thread that is not the owner, the return value reflects a best-effort approximation of current lock status. Is this from a fortify web scan, or from a static code analysis? can be prevented. If pthread_mutex_lock() cannot acquire the mutex for any reason, the function may introduce a race condition into the program and result in undefined behavior. NIST. null dereference-after-store . Base - a weakness The program can dereference a null-pointer because it does not check the return value of a function that might return null. Page 183. 2005. Address the Null Dereference issues identified by the Fortify scan. This weakness can be detected using dynamic tools and techniques that interact with the software using large test suites with many diverse inputs, such as fuzz testing (fuzzing), robustness testing, and fault injection. Did the call to malloc() fail because req_size was too large or because there were too many requests being handled at the same time? I think I know why I'm getting it , just wanted to know what would be the best way to fix the issue. Depending upon the type and size of the application, it may be possible to free memory that is being used elsewhere so that execution can continue. (where the weakness exists independent of other weaknesses), [REF-6] Katrina Tsipenyuk, Brian Chess Unchecked return value leads to resultant integer overflow and code execution. Dynamic analysis is a great way to uncover error-handling flaws. Team Collaboration and Endpoint Management. View - a subset of CWE entries that provides a way of examining CWE content. What video game is Charlie playing in Poker Face S01E07? Another good example of library abuse is expecting the callee to return trustworthy DNS information to the caller. Double-check the stack trace of the exception, and also check the surrounding lines in case the line number is wrong. CWE, CWSS, CWRAF, and the CWE logo are trademarks of The MITRE Corporation. A Community-Developed List of Software & Hardware Weakness Types, Class: Not Language-Specific (Undetermined Prevalence), Technical Impact: Unexpected State; DoS: Crash, Exit, or Restart. The annotations will help SCA to reduce false negative or false positive security issues thus increasing the accuracy of the report. failure of the process. The programmer has lost the opportunity to record diagnostic information. In this tutorial, we'll take a look at the need to check for null in Java and various alternatives that . environment, ensure that proper locking APIs are used to lock before the Explanation Null-pointer errors are usually the result of one or more programmer assumptions being violated. A Pillar is different from a Category as a Pillar is still technically a type of weakness that describes a mistake, while a Category represents a common characteristic used to group related things. Improper Check for Unusual or Exceptional Conditions, Error Conditions, Return Values, Status Codes, OWASP Top Ten 2004 Category A7 - Improper Error Handling, CERT C Secure Coding Standard (2008) Chapter 9 - Memory Management (MEM), The CERT Oracle Secure Coding Standard for Java (2011) Chapter 4 - Expressions (EXP), CERT C++ Secure Coding Section 08 - Memory Management (MEM), SFP Secondary Cluster: Unchecked Status Condition, CISQ Quality Measures (2016) - Reliability, SEI CERT Oracle Secure Coding Standard for Java - Guidelines 02. [REF-6] Katrina Tsipenyuk, Brian Chess The two main view structures are Slices (flat lists) and Graphs (containing relationships between entries). Harvest Property Management Lodi, Ca, logic or to cause the application to reveal debugging information that If an attacker can control the program's environment so that "cmd" is not defined, the program throws a NULL pointer exception when it attempts to call the trim() method. <. The following code uses Java's SecureRandom class to generate a cryptographically strong pseudo-random number (DO THIS): public static int generateRandom (int maximumValue) { SecureRandom ranGen = new SecureRandom (); return ranGen.nextInt (maximumValue); } Edit on GitHub Why are non-Western countries siding with China in the UN? will be valuable in planning subsequent attacks. All rights reserved. Null pointer errors are usually the result of Game allows remote attackers to cause a denial of service (server crash) via a missing argument, which triggers a null pointer dereference. <, [REF-962] Object Management Group (OMG). Demonstration method: public string DemonstrateNullConditional () { var maybeNull = GetSomethingThatMayBeNull (); if (maybeNull?.InstanceMember == "I wasn't null afterall.") { return maybeNull.OtherMember; } return "Oh, it was null"; } in the above example, the if clause is essentially equivalent to: These may be for specific named Languages, Operating Systems, Architectures, Paradigms, Technologies, or a class of such platforms. Does ZnSO4 + H2 at high pressure reverses to Zn + H2SO4? NULL pointer dereferences are frequently resultant from rarely encountered error conditions, since these are most likely to escape detection during the testing phases. If an attacker provides an address that appears to be well-formed, but the address does not resolve to a hostname, then the call to gethostbyaddr() will return NULL. The platform is listed along with how frequently the given weakness appears for that instance. Could someone advise here? Closed. More information is available Please select a different filter. I'm using "HP Fortify v3.50" on a java project and I find lots of false positive on "Null Dereference", because Fortify doesn't see the control against null is in another method. Copyright 2023, OWASP Foundation, Inc. instructions how to enable JavaScript in your web browser. It is important to remember here to return the literal and not the char being checked. corrected in a simple way. I believe this particular behavior is a gap in the Fortify analyzer implementation, as all other static analysis tools seem to understand the code flow and will not complain about potential null references in this case. Note that this code is also vulnerable to a buffer overflow (CWE-119). citrus county livestock regulations; how many points did klay thompson score last night. CODETOOLS-7900082 Fortify: Analize and fix "Missing Check against Null" issue CODETOOLS-7900081 Fortify: Analize and fix "Null Dereference" issues CODETOOLS-7900080 Fortify: Analize and fix "Log Forging" issues CODETOOLS-7900079 Fortify: Analize and fix "Code Correctness: Regular Expressions Denial of Service" issues But we have observed in practice that not every potential null dereference is a bug that developers want to fix. Show activity on this post. (where the weakness is a quality issue that might indirectly make it easier to introduce security-relevant weaknesses or make them more difficult to detect). This MemberOf Relationships table shows additional CWE Categories and Views that reference this weakness as a member. ASCSM-CWE-252-resource. In rare circumstances, when NULL is equivalent to the 0x0 memory address and privileged code can access it, then writing or reading memory is possible, which may lead to code execution. <, [REF-1033] "NULL Pointer Dereference [CWE-476]". Even when exception handling is being used, it can still be very difficult to return the software to a safe state of operation. Deerlake Middle School Teachers, The following code shows a system property that is set to null and later dereferenced by a programmer who mistakenly assumes it will always be defined. The modules cover the full breadth and depth of topics for PCI Section 6.5 compliance and the items that are important for secure software development. Exceptions. The majority of true, relevant defects identified by Prevent were related to potential null dereference. CODETOOLS-7900080 Fortify: Analize and fix If I had to guess, the tool you're using is complaining about our use of Math.random() but we don't rely on it being cryptographically secure. Is it correct to use "the" before "materials used in making buildings are"? Two common programmer assumptions are "this function call can never fail" and "it doesn't matter if this function call fails". chain: unchecked return value can lead to NULL dereference. Can archive.org's Wayback Machine ignore some query terms? Euler: A baby on his lap, a cat on his back thats how he wrote his immortal works (origin?). "Automated Source Code Security Measure (ASCSM)". So mark them as Not an issue and move on. What are the differences between a HashMap and a Hashtable in Java? Identify all variables and data stores that receive information from external sources, and apply input validation to make sure that they are only initialized to expected values. Identify error conditions that are not likely to occur during normal usage and trigger them. My code is GPL licensed, can I issue a license to have my code be distributed in a specific MIT licensed project? The Null dereference error was on the line of code sortName = lastName; not the call of the setter : fortify do not want you to conditionnally change the value of a variable that was set to null without doing so in all the branches. Chain - a Compound Element that is a sequence of two or more separate weaknesses that can be closely linked together within software. Anything that requires dynamic memory should be buried inside an RAII object that releases the memory when it goes out of scope. When you assign the value of 10 on the second line, your value of 10 is written into the memory location referred to by x. Ie, do you want to know how to fix a vulnerability (this is well-covered, and you should do some research before asking a more concrete question), or do you want to know how to suppress a false-positive (this would likely be off-topic, you should just ask the vendor)? Here is a code snippet: getAuth() should not return null. LKML Archive on lore.kernel.org help / color / mirror / Atom feed * [PATCH] dm: fix dax_dev NULL dereference @ 2019-07-30 11:37 Pankaj Gupta 2019-07-30 11:38 ` Pankaj Gupta 0 siblings, 1 reply; 7+ messages in thread From: Pankaj Gupta @ 2019-07-30 11:37 UTC (permalink / raw) To: snitzer, dan.j.williams Cc: dm-devel, linux-nvdimm, linux-fsdevel, linux-kernel, agk, pagupta 'Murphy Zhou' reports . Whenever we use the "return early" code pattern, Fortify is not able to understand it and raises a "possible null dereference" warning. Class - a weakness that is described in a very abstract fashion, typically independent of any specific language or technology. But the stream and reader classes do not consider it unusual or exceptional if only a small amount of data becomes available. Common Weakness Enumeration. environment so that cmd is not defined, the program throws a null operator is the logical negation operator. The call cr.getPassword() may return null value in the com.hazelcast.client.connection.nio.ClientConnectionManagerImpl.encodeAuthenticationRequest(boolean, SerializationService, ClientPrincipal) method. Fix : Analysis found that this is a false positive result; no code changes are required. Share Improve this answer Follow edited Jun 4, 2019 at 17:08 answered Jun 4, 2019 at 17:01 Thierry 5,170 33 39 are no complete fixes aside from contentious programming, the following Cookie Security. The following Java Virtual Machine versions are supported: Java 8; Java 11; Java 17; while may produce spurious null dereference reports. The stream and reader classes do not consider it to be unusual or exceptional if only a small amount of data becomes available. Unfortunately our Fortify scan takes several hours to run. This code will definitely crash due to a null pointer dereference in certain cases. View Defect : wazuh/ossec-wazuh: USE_AFTER_FREE: C/C++: Coverity's suggestion to fix this bug is to use a delete[] deallocator, but the concerned file is in Null Dereference. issues result in general software reliability problems, but if an Category:Code Quality For an attacker it provides an opportunity to stress the system in unexpected ways. Calculating probabilities from d6 dice pool (Degenesis rules for botches and triggers). The code loops through a set of users, reading a private data file for each user. OWASP does not endorse or recommend commercial products or services, allowing our community to remain vendor neutral with the collective wisdom of the best minds in software security worldwide. The NULL pointer dereference weakness occurs where application dereferences a pointer that is expected to be a valid address but instead is equal to NULL. Most null pointer issues result in general software reliability problems, but if attackers can intentionally trigger a null pointer dereference, they can use the resulting exception to bypass security logic or to cause the application to reveal debugging information that will be valuable in planning subsequent attacks. Take the following code: Integer num; num = new Integer(10); However, its // behavior isn't consistent. including race conditions and simple programming omissions. and Gary McGraw. There is no guarantee that the amount of data returned is equal to the amount of data requested. Null Dereference Analysis in Practice Nathaniel Ayewah Dept. What is a NullPointerException, and how do I fix it? attacker can intentionally trigger a null pointer dereference, the CODETOOLS-7900078 Fortify: Analize and fix "Redundant Null Check" issues. CWE is sponsored by the U.S. Department of Homeland Security (DHS) Cybersecurity and Infrastructure Security Agency (CISA) and managed by the Homeland Security Systems Engineering and Development Institute (HSSEDI) which is operated by The MITRE Corporation (MITRE). 2016-01. The Phase identifies a point in the life cycle at which introduction may occur, while the Note provides a typical scenario related to introduction during the given phase. When you assign the value of 10 on the second line, your value of 10 is written into the memory location referred to by x. case " Null Dereference ": return 476; // Fortify reports weak randomness issues under Obsolete by ESAPI, rather than in // the Insecure Randomness category if it thinks you are using ESAPI. Giannini Guitar Model 2, The nature of simulating nature: A Q&A with IBM Quantum researcher Dr. Jamie We've added a "Necessary cookies only" option to the cookie consent popup. The same occurs with the presence of every form in html/jsp (x)/asp (x) page, that are suspect of CSRF weakness. Wij hebben geen controle over de inhoud van deze sites. The two main view structures are Slices (flat lists) and Graphs (containing relationships between entries). What is the point of Thrower's Bandolier? Java Null Dereference when setting a field to null - Fortify, How Intuit democratizes AI development across teams through reusability. "Automated Source Code Reliability Measure (ASCRM)". TRESPASSING! In order to avoid data races, correctly written programs must check the result of thread synchronization functions and appropriately handle all errors, either by attempting to recover from them or reporting them to higher levels. If I had to guess, the tool you're using is complaining about our use of Math.random() but we don't rely on it being cryptographically secure. 2005-11-07. The program can potentially dereference a null-pointer, thereby causing a segmentation fault. Ignoring a method's return value can cause the program to overlook unexpected states and conditions. Check the documentation for the Connection object of the type returned by the getConnection() factory method, and see if the methods rollback() and close() Null Dereference. null. Copyright 2023 Open Text Corporation. Network Operations Management (NNM and Network Automation). How to tell Jackson to ignore a field during serialization if its value is null? Check the results of all functions that return a value and verify that the value is non-null before acting upon it. Null-pointer dereferences, while common, can generally be found and corrected in a simple way. a NullPointerException. When a reference has the value null, dereferencing . Generally, null variables, references and collections are tricky to handle in Java code.They are not only hard to identify but also complex to deal with. Chapter 7, "Program Building Blocks" Page 341. The lack of a null terminator in buf can result in a buffer overflow in the subsequent call to strcpy(). Calculating probabilities from d6 dice pool (Degenesis rules for botches and triggers), Minimising the environmental effects of my dyson brain. Example . [1] J. Viega, G. McGraw Building Secure Software Addison-Wesley, [2] Standards Mapping - Common Weakness Enumeration, [3] Standards Mapping - Common Weakness Enumeration Top 25 2019, [4] Standards Mapping - Common Weakness Enumeration Top 25 2020, [5] Standards Mapping - Common Weakness Enumeration Top 25 2021, [6] Standards Mapping - Common Weakness Enumeration Top 25 2022, [7] Standards Mapping - DISA Control Correlation Identifier Version 2, [8] Standards Mapping - General Data Protection Regulation (GDPR), [9] Standards Mapping - NIST Special Publication 800-53 Revision 4, [10] Standards Mapping - NIST Special Publication 800-53 Revision 5, [11] Standards Mapping - OWASP Top 10 2004, [12] Standards Mapping - OWASP Application Security Verification Standard 4.0, [13] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1, [14] Standards Mapping - Security Technical Implementation Guide Version 3.1, [15] Standards Mapping - Security Technical Implementation Guide Version 3.4, [16] Standards Mapping - Security Technical Implementation Guide Version 3.5, [17] Standards Mapping - Security Technical Implementation Guide Version 3.6, [18] Standards Mapping - Security Technical Implementation Guide Version 3.7, [19] Standards Mapping - Security Technical Implementation Guide Version 3.9, [20] Standards Mapping - Security Technical Implementation Guide Version 3.10, [21] Standards Mapping - Security Technical Implementation Guide Version 4.1, [22] Standards Mapping - Security Technical Implementation Guide Version 4.2, [23] Standards Mapping - Security Technical Implementation Guide Version 4.3, [24] Standards Mapping - Security Technical Implementation Guide Version 4.4, [25] Standards Mapping - Security Technical Implementation Guide Version 4.5, [26] Standards Mapping - Security Technical Implementation Guide Version 4.6, [27] Standards Mapping - Security Technical Implementation Guide Version 4.7, [28] Standards Mapping - Security Technical Implementation Guide Version 4.8, [29] Standards Mapping - Security Technical Implementation Guide Version 4.9, [30] Standards Mapping - Security Technical Implementation Guide Version 4.10, [31] Standards Mapping - Security Technical Implementation Guide Version 4.11, [32] Standards Mapping - Security Technical Implementation Guide Version 5.1, [33] Standards Mapping - Web Application Security Consortium 24 + 2, [34] Standards Mapping - Web Application Security Consortium Version 2.00, desc.controlflow.cpp.missing_check_against_null. 2019-07-15. Fix : Analysis found that this is a false positive result; no code changes are required. report. High severity (3.7) NULL Pointer Dereference in java-1.8.-openjdk-accessibility | CVE-2019-2962 Category:Java There are at least three flavors of this problem: check-after-dereference, dereference-after-check, and dereference-after-store. It is the same class, @SnakeDoc I'm guessing the OP messed up their. If you are working with a multithreaded or otherwise asynchronous environment, ensure that proper locking APIs are used to lock before the if statement; and unlock when it has finished. Not the answer you're looking for? Base level weaknesses typically describe issues in terms of 2 or 3 of the following dimensions: behavior, property, technology, language, and resource. For example, there may be high likelihood that a weakness will be exploited to achieve a certain impact, but a low likelihood that it will be exploited to achieve a different impact. Stepson gives milf step mom deep anal creampie in big ass. When the URL is not present, the call to getStringExtra() will return null, thus causing a null pointer exception when length() is called. rev2023.3.3.43278. Notice that the return value is not checked before the memcpy operation (CWE-252), so -1 can be passed as the size argument to memcpy() (CWE-805). Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. This behavior makes it important for programmers to examine the return value from read() and other IO methods to ensure that they receive the amount of data they expect. CWE is sponsored by the U.S. Department of Homeland Security (DHS) Cybersecurity and Infrastructure Security Agency (CISA) and managed by the Homeland Security Systems Engineering and Development Institute (HSSEDI) which is operated by The MITRE Corporation (MITRE). In this paper we discuss some of the challenges of using a null dereference analysis in . The unary prefix ! To subscribe to this RSS feed, copy and paste this URL into your RSS reader. The programmer assumes that the files are always 1 kilobyte in size and therefore ignores the return value from Read(). <, [REF-961] Object Management Group (OMG). Asking for help, clarification, or responding to other answers. Browse other questions tagged java fortify or ask your own question. It can be disabled with the -Wno-nonnull-compare option. This example takes an IP address from a user, verifies that it is well formed and then looks up the hostname and copies it into a buffer. The method Equals() in MxRecord.cs can dereference a null pointer in c# how can we dereference pointer in javascript How Can I clones. Fixed by #302 Contributor cmheazel on Jan 7, 2018 cmheazel added the Status:Pull-Request-Issued label on Jan 9, 2018 cmheazel mentioned this issue on Feb 22, 2018 Fortify-Issue-300 Null Dereference issues #302 Merged The Optional class contains methods that can be used to make programs shorter and more intuitive [].. For Benchmark, we've seen it report it both ways. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy.