how to fix null dereference in java fortify

What does this means in this context? The same occurs with the presence of every form in html/jsp (x)/asp (x) page, that are suspect of CSRF weakness. 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. 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. junio 12, 2022. abc news anchors female philadelphia . that is still mostly independent of a resource or technology, but with sufficient details to provide specific methods for detection and prevention. When to use LinkedList over ArrayList in Java? Check the results of all functions that return a value and verify that the value is expected. The following code does not check to see if memory allocation succeeded before attempting to use the pointer returned by malloc(). Copyright 20062023, The MITRE Corporation. Unfortunately our Fortify scan takes several hours to run. This way you initialize sortName only once, and explicitely show that a null value is the right one in some cases, and not that you forgot some cases, leading to a var staying null while it is unexpected. For Benchmark, we've seen it report it both ways. ASCRM-CWE-252-data. Anything that requires dynamic memory should be buried inside an RAII object that releases the memory when it goes out of scope. What fortify do not like is the fact that you initialize the variable with null first, without condition, and then change it. Closed. 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. vegan) just to try it, does this inconvenience the caterers and staff? Explanation Null-pointer errors are usually the result of one or more programmer assumptions being violated. Is there a single-word adjective for "having exceptionally strong moral principles"? Returns the thread that currently owns the write lock, or null if not owned. This argument ignores three important considerations: The following examples read a file into a byte array. In addition, relationships such as PeerOf and CanAlsoBe are defined to show similar weaknesses that the user may want to explore. 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. Copyright 2023, OWASP Foundation, Inc. instructions how to enable JavaScript in your web browser. 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. Euler: A baby on his lap, a cat on his back thats how he wrote his immortal works (origin?). Note that this code is also vulnerable to a buffer overflow . When this happens, CWE refers to X as "primary" to Y, and Y is "resultant" from X. How to tell Jackson to ignore a field during serialization if its value is null? View - a subset of CWE entries that provides a way of examining CWE content. environment so that cmd is not defined, the program throws a null This solution passes the Fortify scan. <, [REF-1033] "NULL Pointer Dereference [CWE-476]". Deerlake Middle School Teachers, This MemberOf Relationships table shows additional CWE Categories and Views that reference this weakness as a member. 2010. Fortify Software in partnership with FindBugs has launched the Java Open Review (JOR) Project. Expressions (EXP), SEI CERT C Coding Standard - Guidelines 03. (Generated from version 2022.1.0.0007 of the Fortify Secure Coding Rulepacks) Exceptions. vegan) just to try it, does this inconvenience the caterers and staff? failure of the process. Why is this sentence from The Great Gatsby grammatical? Object obj = new Object (); String text = obj.toString (); // 'obj' is dereferenced. 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. Can archive.org's Wayback Machine ignore some query terms? Variant level weaknesses typically describe issues in terms of 3 to 5 of the following dimensions: behavior, property, technology, language, and resource. Asking for help, clarification, or responding to other answers. The platform is listed along with how frequently the given weakness appears for that instance. More information is available Please select a different filter. 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. 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). 2005. rev2023.3.3.43278. Closed; is cloned by. Concatenating a string with null is safe. null dereference fortify fix java Follow us. [A-Z a-z 0-9]*$")){ throw new IllegalArgumentException(); } message.setSubject(subject) This still gets flagged by Fortify. Compliance Failure. "The Art of Software Security Assessment". 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. If an attacker can control the programs corrected in a simple way. The traditional defense of this coding error is: "If my program runs out of memory, it will fail. 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. Is Java "pass-by-reference" or "pass-by-value"? java.util.Collections.emptyList() should only be used, if you are sure that every caller of the method does not change the list (does not try to add any items), as this would fail on this unmodifiable List. 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. All rights reserved. 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. Calculating probabilities from d6 dice pool (Degenesis rules for botches and triggers), Minimising the environmental effects of my dyson brain. 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. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Another good example of library abuse is expecting the callee to return trustworthy DNS information to the caller. 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. In both of these situations, fgets() signals that something unusual has happened by returning NULL, but in this code, the warning will not be noticed. (Generated from version 2022.1.0.0007 of the Fortify Secure Coding Rulepacks) We recreated the patterns in a small tool and then performed comparative analysis. 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. Making statements based on opinion; back them up with references or personal experience. 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. So mark them as Not an issue and move on. 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. This user is already logged in to another session. Agissons ici, pour que a change l-bas ! One weakness, X, can directly create the conditions that are necessary to cause another weakness, Y, to enter a vulnerable condition. Does a summoned creature play immediately after being summoned by a ready action? For trivial true positives, these are ones that just never need to be fixed. <, [REF-1031] "Null pointer / Null dereferencing". The following VB.NET code does not check to make sure that it has read 50 bytes from myfile.txt. 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:

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