Redundant Null Check. What is the point of Thrower's Bandolier? citrus county livestock regulations; how many points did klay thompson score last night. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. This table specifies different individual consequences associated with the weakness. [1] Standards Mapping - Common Weakness Enumeration, [2] Standards Mapping - Common Weakness Enumeration Top 25 2019, [3] Standards Mapping - Common Weakness Enumeration Top 25 2020, [4] Standards Mapping - Common Weakness Enumeration Top 25 2021, [5] Standards Mapping - Common Weakness Enumeration Top 25 2022, [6] Standards Mapping - DISA Control Correlation Identifier Version 2, [7] Standards Mapping - General Data Protection Regulation (GDPR), [8] Standards Mapping - NIST Special Publication 800-53 Revision 4, [9] Standards Mapping - NIST Special Publication 800-53 Revision 5, [10] Standards Mapping - OWASP Top 10 2004, [11] Standards Mapping - OWASP Application Security Verification Standard 4.0, [12] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1, [13] Standards Mapping - Security Technical Implementation Guide Version 3.1, [14] Standards Mapping - Security Technical Implementation Guide Version 3.4, [15] Standards Mapping - Security Technical Implementation Guide Version 3.5, [16] Standards Mapping - Security Technical Implementation Guide Version 3.6, [17] Standards Mapping - Security Technical Implementation Guide Version 3.7, [18] Standards Mapping - Security Technical Implementation Guide Version 3.9, [19] Standards Mapping - Security Technical Implementation Guide Version 3.10, [20] Standards Mapping - Security Technical Implementation Guide Version 4.1, [21] Standards Mapping - Security Technical Implementation Guide Version 4.2, [22] Standards Mapping - Security Technical Implementation Guide Version 4.3, [23] Standards Mapping - Security Technical Implementation Guide Version 4.4, [24] Standards Mapping - Security Technical Implementation Guide Version 4.5, [25] Standards Mapping - Security Technical Implementation Guide Version 4.6, [26] Standards Mapping - Security Technical Implementation Guide Version 4.7, [27] Standards Mapping - Security Technical Implementation Guide Version 4.8, [28] Standards Mapping - Security Technical Implementation Guide Version 4.9, [29] Standards Mapping - Security Technical Implementation Guide Version 4.10, [30] Standards Mapping - Security Technical Implementation Guide Version 4.11, [31] Standards Mapping - Security Technical Implementation Guide Version 5.1, [32] Standards Mapping - Web Application Security Consortium 24 + 2, [33] Standards Mapping - Web Application Security Consortium Version 2.00, desc.controlflow.dotnet.missing_check_against_null, desc.controlflow.java.missing_check_against_null, (Generated from version 2022.4.0.0009 of the Fortify Secure Coding Rulepacks), Fortify Taxonomy: Software Security Errors. Penticton Regional Hospital Diagnostic Imaging, If it does not exist, the program cannot perform the desired behavior so it doesn't matter whether I handle the error or allow the program to die dereferencing a null value." Follows a very simple code sample that should reproduce the issue: public override bool Equals (object obj) { var typedObj = obj as SomeCustomClass; if (typedObj == null) return false; return this.Name == typedObj.Name; } In this simple excerpt Fortify complains that "typedObj" can be null in the return statement. Alternate Terms Relationships language that is not susceptible to these issues. The program can potentially dereference a null pointer, thereby raising The text was updated successfully, but these errors were encountered: cmheazel self-assigned this Jan 8, 2018 The best way to avoid memory leaks in C++ is to have as few new/delete calls at the program level as possible ideally NONE. Monitor the software for any unexpected behavior. Java Null Dereference when setting a field to null - Fortify, How Intuit democratizes AI development across teams through reusability. View - a subset of CWE entries that provides a way of examining CWE content. A check-after-dereference error occurs when a program dereferences a pointer that can be, [1] Standards Mapping - Common Weakness Enumeration, [2] Standards Mapping - Common Weakness Enumeration Top 25 2019, [3] Standards Mapping - Common Weakness Enumeration Top 25 2020, [4] Standards Mapping - Common Weakness Enumeration Top 25 2021, [5] Standards Mapping - Common Weakness Enumeration Top 25 2022, [6] Standards Mapping - DISA Control Correlation Identifier Version 2, [7] Standards Mapping - General Data Protection Regulation (GDPR), [8] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012, [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 - Payment Card Industry Data Security Standard Version 3.0, [15] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1, [16] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2, [17] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1, [18] Standards Mapping - Payment Card Industry Software Security Framework 1.0, [19] Standards Mapping - Payment Card Industry Software Security Framework 1.1, [20] Standards Mapping - Security Technical Implementation Guide Version 3.1, [21] Standards Mapping - Security Technical Implementation Guide Version 3.4, [22] Standards Mapping - Security Technical Implementation Guide Version 3.5, [23] Standards Mapping - Security Technical Implementation Guide Version 3.6, [24] Standards Mapping - Security Technical Implementation Guide Version 3.7, [25] Standards Mapping - Security Technical Implementation Guide Version 3.9, [26] Standards Mapping - Security Technical Implementation Guide Version 3.10, [27] Standards Mapping - Security Technical Implementation Guide Version 4.1, [28] Standards Mapping - Security Technical Implementation Guide Version 4.2, [29] Standards Mapping - Security Technical Implementation Guide Version 4.3, [30] Standards Mapping - Security Technical Implementation Guide Version 4.4, [31] Standards Mapping - Security Technical Implementation Guide Version 4.5, [32] Standards Mapping - Security Technical Implementation Guide Version 4.6, [33] Standards Mapping - Security Technical Implementation Guide Version 4.7, [34] Standards Mapping - Security Technical Implementation Guide Version 4.8, [35] Standards Mapping - Security Technical Implementation Guide Version 4.9, [36] Standards Mapping - Security Technical Implementation Guide Version 4.10, [37] Standards Mapping - Security Technical Implementation Guide Version 4.11, [38] Standards Mapping - Security Technical Implementation Guide Version 5.1, [39] Standards Mapping - Web Application Security Consortium 24 + 2, [40] Standards Mapping - Web Application Security Consortium Version 2.00. 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. How do I connect these two faces together? Making statements based on opinion; back them up with references or personal experience. Veracode's dynamic analysis scan automates the process, returning detailed guidance on security flaws to help developers fix them for good. The The play-webgoat repository contains an example web app that uses the Play framework. Null-pointer errors are usually the result of one or more programmer assumptions being violated. For an attacker it provides an opportunity to stress the system in unexpected ways. 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. Null-pointer dereferences, while common, can generally be found and corrected in a simple way. How Intuit democratizes AI development across teams through reusability. Apple. Expressions (EXP), SEI CERT C Coding Standard - Guidelines 03. <, [REF-18] Secure Software, Inc.. "The CLASP Application Security Process". 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 Convert byte[] to String (text data) The below example convert a string to a byte array or byte[] and vice versa. The different Modes of Introduction provide information about how and when this weakness may be introduced. Linux-based device mapper encryption program does not check the return value of setuid and setgid allowing attackers to execute code with unintended privileges. The different Modes of Introduction provide information about how and when this weakness may be introduced. Extended Description NULL pointer dereference issues can occur through a number of flaws, including race conditions, and simple programming omissions. Synopsys-sigcoverity-common-api A challenge mostly of GitHub. 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. Base - a weakness System.clearProperty ("os.name"); . serve to prevent null-pointer dereferences. Take the following code: Integer num; num = new Integer(10); So you have a couple of choices: Ignore the warning. (Generated from version 2022.4.0.0009 of the Fortify Secure Coding Rulepacks), Fortify Taxonomy: Software Security Errors. 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. Addison Wesley. A password reset link will be sent to you by email. In the following code, the programmer assumes that the system always has a property named "cmd" defined. set them to NULL once they are freed: If you are working with a multi-threaded or otherwise asynchronous Is this from a fortify web scan, or from a static code analysis? Show activity on this post. More specific than a Pillar Weakness, but more general than a Base Weakness. How do I convert a String to an int in Java? 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. Because memcpy() assumes that the value is unsigned, it will be interpreted as MAXINT-1 (CWE-195), and therefore will copy far more memory than is likely available to the destination buffer (CWE-787, CWE-788). including race conditions and simple programming omissions. When to use LinkedList over ArrayList in Java? The same occurs with the presence of every form in html/jsp (x)/asp (x) page, that are suspect of CSRF weakness. Use of the Common Weakness Enumeration (CWE) and the associated references from this website are subject to the Terms of Use. When the URL is not present, the call to getStringExtra() will return null, thus causing a null pointer exception when length() is called. Null pointer errors are usually the result of 2010. Use automated static analysis tools that target this type of weakness. 2019-07-15. [REF-44] Michael Howard, David LeBlanc Object obj = new Object (); String text = obj.toString (); // 'obj' is dereferenced. Thierry's answer works great. Asking for help, clarification, or responding to other answers. Any reference to the HP and Hewlett Packard Enterprise/HPE marks is historical in nature, and the HP and Hewlett Packard Enterprise/HPE marks are the property of their respective owners. I'll try this solution. if statement; and unlock when it has finished. 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. This listing shows possible areas for which the given weakness could appear. In this paper we discuss some of the challenges of using a null dereference analysis in . There are some Fortify links at the end of the article for your reference. If you trigger an unhandled exception or similar error that was discovered and handled by the application's environment, it may still indicate unexpected conditions that were not handled by the application itself. Instead use String.valueOf (object). 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. Dereference before null check. CWE is a community-developed list of software and hardware weakness types. This information is often useful in understanding where a weakness fits within the context of external information sources. Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') -Wnull-dereference. CWE-476: NULL Pointer Dereference: A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. (Generated from version 2022.1.0.0007 of the Fortify Secure Coding Rulepacks) Exceptions. Is there a single-word adjective for "having exceptionally strong moral principles"? Reply Cancel Cancel; Top Take the following code: Integer num; num = new Integer(10); Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') Fix : Analysis found that this is a false positive result; no code changes are required. For example, run the program under low memory conditions, run with insufficient privileges or permissions, interrupt a transaction before it is completed, or disable connectivity to basic network services such as DNS. The following code does not check to see if the string returned by the Item property is null before calling the member function Equals(), potentially causing a NULL dereference. Copyright 20062023, The MITRE Corporation. Added Fortify's analysis trace, which is showing that the dereference of sortName is the problem. Base level weaknesses typically describe issues in terms of 2 or 3 of the following dimensions: behavior, property, technology, language, and resource. The program can dereference a null-pointer because it does not check the return value of a function that might return null. Poor code quality leads to unpredictable behavior. These may be for specific named Languages, Operating Systems, Architectures, Paradigms, Technologies, or a class of such platforms. As it merges scan results, Fortify Static Code Analyzer marks issues that were uncovered in a previous scan, but are no longer evident in the most recent Fortify Static Code Analyzer analysis results as Removed. Take the following code: Integer num; num = new Integer(10); Cross-Client Data Access. I think I know why I'm getting it , just wanted to know what would be the best way to fix the issue. Null dereference is a common type of runtime failure in Java programs, and it is necessary to verify whether a dereference in the program is safe. Enter the username or e-mail you used in your profile. one or more programmer assumptions being violated. In the following code, the programmer assumes that the system always has Category:Vulnerability. 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. Microsoft Press. Why are trials on "Law & Order" in the New York Supreme Court? Bny Mellon Layoffs 2021, and Justin Schuh. Closed. Whenever we use the "return early" code pattern, Fortify is not able to understand it and raises a "possible null dereference" warning. 3 FortifyJava 8 - Fortify : Null dereference for Java 8 Java 8 fortify Null Dereference null When working on a few Null Dereferencing warnings from Fortify, I was wondering if we could use standard .Net CodeContracts clauses to help Fortify in figuring out the exceptions. This table shows the weaknesses and high level categories that are related to this weakness. [REF-6] Katrina Tsipenyuk, Brian Chess The traditional defense of this coding error is: "If my program runs out of memory, it will fail. Web-application scanning, also known as dynamic analysis, is a type of test that runs while an application is in a development environment. <, [REF-962] Object Management Group (OMG). attacker can intentionally trigger a null pointer dereference, the For Benchmark, we've seen it report it both ways. 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. Pour adhrer l'association, rien de plus simple : une cotisation minimale de 1,50 est demande. What's the difference between a power rail and a signal line? The program might dereference a null-pointer because it does not check the return value of a function that might return null.
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