how to fix null dereference in java fortify

The program can potentially dereference a null-pointer, thereby causing a segmentation fault. <, [REF-1032] "Null Reference Creation and Null Pointer Dereference". Is it suspicious or odd to stand by the gate of a GA airport watching the planes? set them to NULL once they are freed: If you are working with a multi-threaded or otherwise asynchronous If Fortify SCA can be put into a pipeline, it can also be hooked to fix issues automatically (although care must be taken to avoid situations like the Debian OpenSSL PRNG vulnerability, which was not a vulnerability until a security-focused static code analyzer suggested a fix that ended up being July 2019. pylint. (Java) and to compare it with existing bug reports on the tool to test its efficacy. It should be investigated and fixed OR suppressed as not a bug. 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. Copyright 2023 Open Text Corporation. [REF-62] Mark Dowd, John McDonald 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. Penticton Regional Hospital Diagnostic Imaging, Compliance Failure. Base level weaknesses typically describe issues in terms of 2 or 3 of the following dimensions: behavior, property, technology, language, and resource. Does a summoned creature play immediately after being summoned by a ready action? process, unless exception handling (on some platforms) is invoked, and What fortify do not like is the fact that you initialize the variable with null first, without condition, and then change it. In this case, the caller abuses the callee API by making certain assumptions about its behavior (that the return value can be used for authentication purposes). 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. My code is GPL licensed, can I issue a license to have my code be distributed in a specific MIT licensed project? While there Team Collaboration and Endpoint Management. Implementation: If all pointers that could have been modified are Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Ensure that you account for all possible return values from the function. 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. 2012-09-11. "The Art of Software Security Assessment". More information is available Please select a different filter. ASCRM-CWE-252-resource. 2016-01. 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. But, when you try to declare a reference type, something different happens. Most errors and unusual events in Java result in an exception being thrown. Implementation: Proper sanity checks at implementation time can Null-pointer dereferences, while common, can generally be found and corrected in a simple way. Is a PhD visitor considered as a visiting scholar? 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). <. : Fortify: The method processMessage() in VET360InboundProcessService.java can crash the program by dereferencing a null pointer on line 197. serve to prevent null-pointer dereferences. (Generated from version 2022.1.0.0007 of the Fortify Secure Coding Rulepacks) Exceptions. Variant - a weakness Network monitor allows remote attackers to cause a denial of service (crash) or execute arbitrary code via malformed packets that cause a NULL pointer dereference. 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. The method isXML () in jquery-1.4.4.js can dereference a null pointer on line 4283, thereby raising a NullExcpetion. 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. These relationships are defined as ChildOf, ParentOf, MemberOf and give insight to similar items that may exist at higher and lower levels of abstraction. 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. How to tell Jackson to ignore a field during serialization if its value is null? This can cause DoDangerousOperation() to operate on an unexpected value. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, what happens if, just for testing, you do. 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. 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. Time arrow with "current position" evolving with overlay number, Doubling the cube, field extensions and minimal polynoms. For an attacker it provides an opportunity to stress the system in unexpected ways. clones. Disadvantages Of Group Learning, Take the following code: Integer num; num = new Integer(10); of Computer Science University of Maryland College Park, MD ayewah@cs.umd.edu William Pugh Dept. Double-check the stack trace of the exception, and also check the surrounding lines in case the line number is wrong. Without handling the error, there is no way to know. is incorrect. Category:Vulnerability. 2016-01. [REF-6] Katrina Tsipenyuk, Brian Chess 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. Removed issues. It works under 64-bit systems in Windows, Linux and macOS environments, and can analyze source code intended for 32-bit, 64-bit and embedded ARM platforms. 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. Can archive.org's Wayback Machine ignore some query terms? The program can potentially dereference a null-pointer, thereby raising a NullPointerException. The following Java Virtual Machine versions are supported: Java 8; Java 11; Java 17; while may produce spurious null dereference reports. Convert byte[] to String (text data) The below example convert a string to a byte array or byte[] and vice versa. Palash Sachan 8-Feb-17 13:41pm. Expressions (EXP), Weaknesses in the 2019 CWE Top 25 Most Dangerous Software Errors, Weaknesses in the 2021 CWE Top 25 Most Dangerous Software Weaknesses, Weaknesses in the 2020 CWE Top 25 Most Dangerous Software Weaknesses, Weaknesses in the 2022 CWE Top 25 Most Dangerous Software Weaknesses, https://samate.nist.gov/SSATTM_Content/papers/Seven%20Pernicious%20Kingdoms%20-%20Taxonomy%20of%20Sw%20Security%20Errors%20-%20Tsipenyuk%20-%20Chess%20-%20McGraw.pdf, https://cwe.mitre.org/documents/sources/TheCLASPApplicationSecurityProcess.pdf, https://en.wikipedia.org/wiki/Null_pointer#Null_dereferencing, https://developer.apple.com/documentation/code_diagnostics/undefined_behavior_sanitizer/null_reference_creation_and_null_pointer_dereference, https://www.immuniweb.com/vulnerability/null-pointer-dereference.html, Cybersecurity and Infrastructure Security Agency, Homeland Security Systems Engineering and Development Institute, Null Dereference (Null Pointer Dereference), updated Applicable_Platforms, Common_Consequences, Relationships, Other_Notes, Taxonomy_Mappings, Weakness_Ordinalities, updated Common_Consequences, Demonstrative_Examples, Other_Notes, Potential_Mitigations, Weakness_Ordinalities, updated Potential_Mitigations, Relationships, updated Demonstrative_Examples, Description, Detection_Factors, Potential_Mitigations, updated Demonstrative_Examples, Observed_Examples, Relationships, updated Related_Attack_Patterns, Relationships, updated Observed_Examples, Related_Attack_Patterns, Relationships, updated Relationships, Taxonomy_Mappings, White_Box_Definitions, updated Demonstrative_Examples, Observed_Examples, updated Alternate_Terms, Applicable_Platforms, Observed_Examples. System.clearProperty ("os.name"); . cmd=cmd.trim(); Null-pointer dereference issues can occur through a number of flaws, McGraw-Hill. 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. Take the following code: Integer num; num = new Integer(10); So you have a couple of choices: Ignore the warning. The two main view structures are Slices (flat lists) and Graphs (containing relationships between entries). Page 183. 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." ImmuniWeb. Another good example of library abuse is expecting the callee to return trustworthy DNS information to the caller. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. 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. To learn more, see our tips on writing great answers. Class level weaknesses typically describe issues in terms of 1 or 2 of the following dimensions: behavior, property, and resource. if statement; and unlock when it has finished. Unless otherwise specified, all content on the site is Creative Commons Attribution-ShareAlike v4.0 and provided without warranty of service or accuracy. La Segunda Vida De Bree Tanner. Exceptions. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. 2005-11-07. What fortify do not like is the fact that you initialize the variable with null first, without condition, and then change it. 2005. <, [REF-1031] "Null pointer / Null dereferencing". Making statements based on opinion; back them up with references or personal experience. Harvest Property Management Lodi, Ca, 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. So mark them as Not an issue and move on. There are some Fortify links at the end of the article for your reference. From a user's perspective that often manifests itself as poor usability. This information is often useful in understanding where a weakness fits within the context of external information sources. Network monitor allows remote attackers to cause a denial of service (crash) via a malformed Q.931, which triggers a null dereference. More specific than a Pillar Weakness, but more general than a Base Weakness. Fix : Analysis found that this is a false positive result; no code changes are required. But attackers are skilled at finding unexpected paths through programs, particularly when exceptions are involved. Closed. The ftrace implementation in the Linux kernel before 3.8.8 allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact by leveraging the CAP_SYS_ADMIN capability for write access to the (1) set_ftrace_pid or (2) set_graph_function file, and then making an lseek system call. CWE, CWSS, CWRAF, and the CWE logo are trademarks of The MITRE Corporation. When it comes to these specific properties, you're safe. Returns the thread that currently owns the write lock, or null if not owned. Not the answer you're looking for? attacker can intentionally trigger a null pointer dereference, the Content Provider URI Injection. What does this means in this context? I'll update as soon as I have more information thx Thierry. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The best way to fix this is not returning, @MarkRotteveel those are from different classes, is there a way to return an empty list that will not cause null dereference? NULL is used as though it pointed to a valid memory area. It serves as a common language, a measuring stick for security tools, and as a baseline for weakness identification, mitigation, and prevention efforts. vegan) just to try it, does this inconvenience the caterers and staff? getAuth() should not return null.A method returning a List should per convention never return null but an empty List as default "empty" value.. private List, how to fix null dereference in java fortify 2022, Birthday Wishes For 14 Year Old Son From Mother. For example, if a program fails to call chdir() after calling chroot(), it violates the contract that specifies how to change the active root directory in a secure fashion. I'd prefer to get rid of the finding vs. just write it off. This table shows the weaknesses and high level categories that are related to this weakness. Connect and share knowledge within a single location that is structured and easy to search. As of September 1, 2017, the Material is now offered by Micro Focus, a separately owned and operated company. The programmer expects that when fgets() returns, buf will contain a null-terminated string of length 9 or less. Program does not check return value when invoking functions to drop privileges, which could leave users with higher privileges than expected by forcing those functions to fail. Does ZnSO4 + H2 at high pressure reverses to Zn + H2SO4? PS: Yes, Fortify should know that these properties are secure. 2nd Edition. matthew le nevez love child facebook; how to ignore a house on fire answer key twitter; who is depicted in this ninth century equestrian portrait instagram; wasilla accident report youtube; newark state of the city 2021 mail These may be for specific named Languages, Operating Systems, Architectures, Paradigms, Technologies, or a class of such platforms. one or more programmer assumptions being violated. Improper Check for Unusual or Exceptional Conditions, Unchecked Return Value to NULL Pointer Dereference, Memory Allocation with Excessive Size Value, Improperly Controlled Sequential Memory Allocation, OWASP Top Ten 2004 Category A9 - Denial of Service, CERT C Secure Coding Standard (2008) Chapter 4 - Expressions (EXP), CERT C Secure Coding Standard (2008) Chapter 9 - Memory Management (MEM), CERT C++ Secure Coding Section 03 - Expressions (EXP), CERT C++ Secure Coding Section 08 - Memory Management (MEM), SFP Secondary Cluster: Faulty Pointer Use, SEI CERT Oracle Secure Coding Standard for Java - Guidelines 02. Asking for help, clarification, or responding to other answers. Deerlake Middle School Teachers, void host_lookup(char *user_supplied_addr){, if("com.example.URLHandler.openURL".equals(intent.getAction())) {. Concatenating a string with null is safe. The unary prefix ! Extended Description NULL pointer dereference issues can occur through a number of flaws, including race conditions, and simple programming omissions. corrected in a simple way. Added Fortify's analysis trace, which is showing that the dereference of sortName is the problem. For example, if the program calls a function to drop privileges but does not check the return code to ensure that privileges were successfully dropped, then the program will continue to operate with the higher privileges. Apple. What are the differences between a HashMap and a Hashtable in Java? failure of the process. The traditional defense of this coding error is: "If my program runs out of memory, it will fail. Fortify keeps track of the parts that came from the original input. Object obj = new Object (); String text = obj.toString (); // 'obj' is dereferenced. report. The program can potentially dereference a null pointer, thereby raising null dereference-after-store . It doesn't matter whether I handle the error or allow the program to die with a segmentation fault when it tries to dereference the null pointer." What is the correct way to screw wall and ceiling drywalls? All rights reserved. Use automated static analysis tools that target this type of weakness. Availability: Null-pointer dereferences invariably result in the

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