More specific than a Pillar Weakness, but more general than a Base Weakness. rev2023.3.3.43278. Description. Once you are fixing issues automatically (not all issues will be like this, so focus on certain always-true positives with standardized remediation that can be code generated through high-fidelity qualities), then you can turn your attention towards trivial true positives. java"HP Fortify v3.50""Null Dereference"Fortifynull. Il suffit de nous contacter ! The annotations will help SCA to reduce false negative or false positive security issues thus increasing the accuracy of the report. The platform is listed along with how frequently the given weakness appears for that instance. How do I convert a String to an int in Java? Asking for help, clarification, or responding to other answers. Even when exception handling is being used, it can still be very difficult to return the software to a safe state of operation. Implementation: Proper sanity checks at implementation time can NULL pointer dereference issues can occur through a number of flaws, including race conditions, and simple programming omissions. a NULL pointer dereference would then occur in the call to strcpy(). process, unless exception handling (on some platforms) is invoked, and This table shows the weaknesses and high level categories that are related to this weakness. <, [REF-962] Object Management Group (OMG). how many points did klay thompson score last night, keller williams luxury listing presentation, who died in the manchester united plane crash, what does the bible say about feeding birds, Penticton Regional Hospital Diagnostic Imaging, Clark Atlanta University Music Department, is the character amos decker black or white. NULL is used as though it pointed to a valid memory area. Thank you for visiting OWASP.org. When designing a function, make sure you return a value or throw an exception in case of an error. This is an example of a Project or Chapter Page. Base level weaknesses typically describe issues in terms of 2 or 3 of the following dimensions: behavior, property, technology, language, and resource. The Scope identifies the application security area that is violated, while the Impact describes the negative technical impact that arises if an adversary succeeds in exploiting this weakness. Harvest Property Management Lodi, Ca, Chain - a Compound Element that is a sequence of two or more separate weaknesses that can be closely linked together within software. Exceptions. This table specifies different individual consequences associated with the weakness. cmd=cmd.trim(); Null-pointer dereference issues can occur through a number of flaws, Since the code does not check the return value from gethostbyaddr (CWE-252), a NULL pointer dereference (CWE-476) would then occur in the call to strcpy(). The program can potentially dereference a null-pointer, thereby causing a segmentation fault. These may be for specific named Languages, Operating Systems, Architectures, Paradigms, Technologies, or a class of such platforms. 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. If you preorder a special airline meal (e.g. Palash Sachan 8-Feb-17 13:41pm. Fortify Software in partnership with FindBugs has launched the Java Open Review (JOR) Project. 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. CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Many analysis techniques have been proposed to determine when a potentially null value may be dereferenced. can be prevented. The opinions expressed above are the personal opinions of the authors, not of Micro Focus. Null-pointer dereferences, while common, can generally be found and corrected in a simple way. SSL software allows remote attackers to cause a denial of service (crash) via a crafted SSL/TLS handshake that triggers a null dereference. Common Weakness Enumeration. The TOP 25 Errors List will be updated regularly and will be posted at both the SANS and MITRE sites. It can be disabled with the -Wno-nonnull-compare option. <, [REF-1032] "Null Reference Creation and Null Pointer 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. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, what happens if, just for testing, you do. Java/JSP. 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. 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? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. The Likelihood provides information about how likely the specific consequence is expected to be seen relative to the other consequences in the list. logic or to cause the application to reveal debugging information that The method isXML () in jquery-1.4.4.js can dereference a null pointer on line 4283, thereby raising a NullExcpetion. void host_lookup(char *user_supplied_addr){, if("com.example.URLHandler.openURL".equals(intent.getAction())) {. Connection String Parameter Pollution. Penticton Regional Hospital Diagnostic Imaging, 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). 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 "24 Deadly Sins of Software Security". Is Java "pass-by-reference" or "pass-by-value"? The following code does not check to see if memory allocation succeeded before attempting to use the pointer returned by malloc(). vegan) just to try it, does this inconvenience the caterers and staff? 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. Certain versions of content ("Material") accessible here may contain branding from Hewlett-Packard Company (now HP Inc.) and Hewlett Packard Enterprise Company. Null-pointer dereferences, while common, can generally be found and It is not uncommon for Java programmers to misunderstand read() and related methods that are part of many java.io classes. These relationships are defined as ChildOf, ParentOf, MemberOf and give insight to similar items that may exist at higher and lower levels of abstraction. They will always result in the crash of the [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. If you can guaranty this, then the empty List is even better, as it does not create a new object all the time. 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. The Java VM sets them so, as long as Java isn't corrupted, you're safe. Class level weaknesses typically describe issues in terms of 1 or 2 of the following dimensions: behavior, property, and resource. Double-check the stack trace of the exception, and also check the surrounding lines in case the line number is wrong. Base - a weakness 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. Example . ImmuniWeb. CWE is a community-developed list of software and hardware weakness types. and Justin Schuh. What fortify do not like is the fact that you initialize the variable with null first, without condition, and then change it. Just about every serious attack on a software system begins with the violation of a programmer's assumptions. System.clearProperty ("os.name"); . 2016-01. The following function attempts to acquire a lock in order to perform operations on a shared resource. For an attacker it provides an opportunity to stress the system in unexpected ways. 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-62] Mark Dowd, John McDonald 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. 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. Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2, How to avoid false positive "Null Dereference" error in Fortify, Java Null Dereference when setting a field to null with Fortify. The program can potentially dereference a null-pointer, thereby raising a NullPointerException. Thierry's answer works great. Is there a single-word adjective for "having exceptionally strong moral principles"? This website uses cookies to analyze our traffic and only share that information with our analytics partners. To learn more, see our tips on writing great answers. PS: Yes, Fortify should know that these properties are secure. As a matter of fact, any miss in dealing with null cannot be identified at compile time and results in a NullPointerException at runtime.. Fix: Added if block around the close call at line 906 to keep this from being 3 FortifyJava 8 - Fortify : Null dereference for Java 8 Java 8 fortify Null Dereference null Common Weakness Enumeration. 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. It serves as a common language, a measuring stick for security tools, and as a baseline for weakness identification, mitigation, and prevention efforts. How do I efficiently iterate over each entry in a Java Map? This MemberOf Relationships table shows additional CWE Categories and Views that reference this weakness as a member. Here is a code snippet: getAuth() should not return null. So mark them as Not an issue and move on. rev2023.3.3.43278. 2005-11-07. Expressions (EXP), SEI CERT C Coding Standard - Guidelines 12. As of September 1, 2017, the Material is now offered by Micro Focus, a separately owned and operated company. Category:Vulnerability. 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. Explicitly initialize all your variables and other data stores, either during declaration or just before the first usage. The program can dereference a null-pointer because it does not check the return value of a function that might return null. McGraw-Hill. NULL pointer dereferences usually result in the failure of the process unless exception handling (on some platforms) is available and implemented. Instead use String.valueOf (object). NIST Workshop on Software Security Assurance Tools Techniques and Metrics. Class - a weakness that is described in a very abstract fashion, typically independent of any specific language or technology. View - a subset of CWE entries that provides a way of examining CWE content. Error Handling (ERR), SEI CERT C Coding Standard - Guidelines 50. Alle links, video's en afbeeldingen zijn afkomstig van derden. [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. ASCSM-CWE-252-resource. operator is the logical negation operator. Take the following code: Integer num; num = new Integer(10); So you have a couple of choices: Ignore the warning. David LeBlanc. will be valuable in planning subsequent attacks. Could someone advise here? The The play-webgoat repository contains an example web app that uses the Play framework. Whenever we use the "return early" code pattern, Fortify is not able to understand it and raises a "possible null dereference" warning. But we have observed in practice that not every potential null dereference is a "bug " that developers want to 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. TRESPASSING! But attackers are skilled at finding unexpected paths through programs, particularly when exceptions are involved. 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. Dereference before null check (REVERSE_INULL) There may be a null pointer exception, or else the comparison against null is unnecessary. Thanks for the input! 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. 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. 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. even then, little can be done to salvage the process. The lack of a null terminator in buf can result in a buffer overflow in the subsequent call to strcpy(). Most appsec missions are graded on fixing app vulns, not finding them. The following Java Virtual Machine versions are supported: Java 8; Java 11; Java 17; while may produce spurious null dereference reports. Is it suspicious or odd to stand by the gate of a GA airport watching the planes? Explanation Null-pointer errors are usually the result of one or more programmer assumptions being violated. 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. : Fortify: The method processMessage() in VET360InboundProcessService.java can crash the program by dereferencing a null pointer on line 197. <, [REF-1033] "NULL Pointer Dereference [CWE-476]". 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. While there Null pointers null dereference null dereference best practices Using Nullable type parameters Memory leak Unmanaged memory leaks. What can a lawyer do if the client wants him to be acquitted of everything despite serious evidence? 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. In addition, relationships such as PeerOf and CanAlsoBe are defined to show similar weaknesses that the user may want to explore. Avoid Returning null from Methods. This is not a perfect solution, since 100% accuracy and coverage are not feasible. Het is gebruikers verboden materiaal te plaatsen waarop personen jonger dan 18 jaar worden afgebeeld. Making statements based on opinion; back them up with references or personal experience.