The lack of a null terminator in buf can result in a buffer overflow in the subsequent call to strcpy(). NIST Workshop on Software Security Assurance Tools Techniques and Metrics. Dynamic analysis is a great way to uncover error-handling flaws. This table specifies different individual consequences associated with the weakness. environment, ensure that proper locking APIs are used to lock before the A Community-Developed List of Software & Hardware Weakness Types, Class: Not Language-Specific (Undetermined Prevalence), Technical Impact: Unexpected State; DoS: Crash, Exit, or Restart. "Seven Pernicious Kingdoms: A Taxonomy of Software Security Errors". Closed. CODETOOLS-7900078 Fortify: Analize and fix "Redundant Null Check" issues. We recently migrated our community to a new web platform and regretably the content for this page needed to be programmatically ported from its previous wiki page. Share Improve this answer Follow edited Jun 4, 2019 at 17:08 answered Jun 4, 2019 at 17:01 Thierry 5,170 33 39 (where the weakness exists independent of other weaknesses), [REF-6] Katrina Tsipenyuk, Brian Chess View - a subset of CWE entries that provides a way of examining CWE content. NULL pointer dereferences usually result in the failure of the process unless exception handling (on some platforms) is available and implemented. Anyone have experience with this one? Asking for help, clarification, or responding to other answers. 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. High severity (3.7) NULL Pointer Dereference in java-1.8.-openjdk-accessibility | CVE-2019-2962 OWASP, the OWASP logo, and Global AppSec are registered trademarks and AppSec Days, AppSec California, AppSec Cali, SnowFROC, and LASCON are trademarks of the OWASP Foundation, Inc. Not the answer you're looking for? 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. 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. Abstract. Note that this code is also vulnerable to a buffer overflow . For example, the owner may be momentarily null even if there are threads trying to acquire the lock but have not yet done so . Take the following code: Integer num; num = new Integer(10); Cross-Client Data Access. [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. Whenever we use the "return early" code pattern, Fortify is not able to understand it and raises a "possible null dereference" warning. How can we prove that the supernatural or paranormal doesn't exist? The traditional defense of this coding error is: "If my program runs out of memory, it will fail. PVS-Studio is a tool for detecting bugs and security weaknesses in the source code of programs, written in C, C++, C# and Java. 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. There are at least three flavors of this problem: check-after-dereference, dereference-after-check, and dereference-after-store. Network Operations Management (NNM and Network Automation). "Automated Source Code Reliability Measure (ASCRM)". There are at least three flavors of this problem: check-after-dereference, dereference-after-check, and dereference-a What video game is Charlie playing in Poker Face S01E07? 2010. Not the answer you're looking for? Explanation Null-pointer errors are usually the result of one or more programmer assumptions being violated. set them to NULL once they are freed: If you are working with a multi-threaded or otherwise asynchronous In addition, relationships such as PeerOf and CanAlsoBe are defined to show similar weaknesses that the user may want to explore. Show activity on this post. "Seven Pernicious Kingdoms: A Taxonomy of Software Security Errors". Variant level weaknesses typically describe issues in terms of 3 to 5 of the following dimensions: behavior, property, technology, language, and resource. But if an I/O error occurs, fgets() will not null-terminate buf. However, the code does not check the value returned by pthread_mutex_lock() for errors. Fix: Added if block around the close call at line 906 to keep this from being . Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2. 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 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. Removed issues. Agissons ici, pour que a change l-bas ! While there are no complete fixes aside from conscientious programming, the following steps will go a long way to ensure that NULL pointer dereferences do not occur. When it comes to these specific properties, you're safe. Network monitor allows remote attackers to cause a denial of service (crash) via a malformed Q.931, which triggers a null dereference. Here is a code snippet: public class Example { private Collection<Auth> Authorities; public Example (SomeUser user) { for (String role: user.getAuth ()) { //This is where Fortify gives me a null dereference Authorities.add (new Auth (role)); } } private List<String> getAuth () { return null; } } java fortify Share Improve this question The program can potentially dereference a null-pointer, thereby raising a NullPointerException. Most errors and unusual events in Java result in an exception being thrown. Unless otherwise specified, all content on the site is Creative Commons Attribution-ShareAlike v4.0 and provided without warranty of service or accuracy. 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. Is a PhD visitor considered as a visiting scholar? Pillar - a weakness that is the most abstract type of weakness and represents a theme for all class/base/variant weaknesses related to it. Many modern techniques use data flow analysis to minimize the number of false positives. This table shows the weaknesses and high level categories that are related to this weakness. For an attacker it provides an opportunity to stress the system in unexpected ways. Unchecked return value leads to resultant integer overflow and code execution. 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. It serves as a common language, a measuring stick for security tools, and as a baseline for weakness identification, mitigation, and prevention efforts. John Aldridge Hillsborough Nc Obituary, Take the following code: Integer num; num = new Integer(10); So you have a couple of choices: Ignore the warning. NIST Workshop on Software Security Assurance Tools Techniques and Metrics. Certain versions of content ("Material") accessible here may contain branding from Hewlett-Packard Company (now HP Inc.) and Hewlett Packard Enterprise Company. About an argument in Famine, Affluence and Morality. How do I convert a String to an int in Java? Check the results of all functions that return a value and verify that the value is non-null before acting upon it. Theres still some work to be done. including race conditions and simple programming omissions. Copyright 2023, OWASP Foundation, Inc. instructions how to enable JavaScript in your web browser. 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. Base - a weakness Euler: A baby on his lap, a cat on his back thats how he wrote his immortal works (origin?). In this paper we discuss some of the challenges of using a null It is equivalent to the following code: result = s Is Nothing OrElse s = String.Empty. null dereference-after-store . Alternate Terms Relationships Category:Java 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. 10 Avoiding Attempt to Dereference Null Object Errors - YouTube 0:00 / 8:00 10 Avoiding Attempt to Dereference Null Object Errors 4,029 views Oct 22, 2014 In this episode we look at 3 common. Note that this code is also vulnerable to a buffer overflow . Chapter 20, "Checking Returns" Page 624. Chain: Use of an unimplemented network socket operation pointing to an uninitialized handler function (, Chain: race condition might allow resource to be released before operating on it, leading to NULL dereference, Chain: some unprivileged ioctls do not verify that a structure has been initialized before invocation, leading to NULL dereference, Chain: IP and UDP layers each track the same value with different mechanisms that can get out of sync, possibly resulting in a NULL dereference, Chain: uninitialized function pointers can be dereferenced allowing code execution, Chain: improper initialization of memory can lead to NULL dereference, Chain: game server can access player data structures before initialization has happened leading to NULL dereference, Chain: The return value of a function returning a pointer is not checked for success (, Chain: a message having an unknown message type may cause a reference to uninitialized memory resulting in a null pointer dereference (, Chain: unchecked return value can lead to NULL dereference. NULL is used as though it pointed to a valid memory area. To learn more, see our tips on writing great answers. "Automated Source Code Security Measure (ASCSM)". High severity (5.3) NULL Pointer Dereference in java-1.8.-openjdk-accessibility | CVE-2021-35578 I have a solution to the Fortify Path Manipulation issues. This also passes Fortify's scan: Thanks for contributing an answer to Stack Overflow! The program can potentially dereference a null-pointer, thereby raising a NullPointerException. Class - a weakness that is described in a very abstract fashion, typically independent of any specific language or technology.
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