how to fix null dereference in java fortify

The code loops through a set of users, reading a private data file for each user. More information is available Please select a different filter. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. NIST. 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? 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 Fix : Analysis found that this is a false positive result; no code changes are required. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. The programmer expects that when fgets() returns, buf will contain a null-terminated string of length 9 or less. Thierry's answer works great. Wikipedia. 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. The following Java Virtual Machine versions are supported: Java 8; Java 11; Java 17; while may produce spurious null dereference reports. 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. Null-pointer exceptions usually occur when one or more of the programmer's assumptions is violated. [REF-961] Object Management Group (OMG). if statement; and unlock when it has finished. 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." (Generated from version 2022.1.0.0007 of the Fortify Secure Coding Rulepacks) Exceptions. ASCRM-CWE-252-data. 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. ssh component for Go allows clients to cause a denial of service (nil pointer dereference) against SSH servers. Network Operations Management (NNM and Network Automation). I'll try this solution. 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. Note that this code is also vulnerable to a buffer overflow (CWE-119). Follows a very simple code sample that should reproduce the issue: In this simple excerpt Fortify complains that "typedObj" can be null in the return statement. 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. ASCRM-CWE-252-resource. Vulnerability For example, if a coder subclasses SecureRandom and returns a non-random value, the contract is violated. Denial of service Flooding Resource exhaustion Sustained client engagement Denial of service problems in C# Infinite loop Economic Denial of Sustainability (EDoS) Amplification Other amplification examples There are too few details in this report for us to be able to work on it. (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. Calculating probabilities from d6 dice pool (Degenesis rules for botches and triggers). NULL pointer dereference issues can occur through a number of flaws, including race conditions, and simple programming omissions. 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. serve to prevent null-pointer dereferences. can be prevented. Notice how that can never be possible since the method returns early with a 'false' value on the previous 'if' statement. How to will fortify scan in eclipse Ace Madden. The product does not check the return value from a method or function, which can prevent it from detecting unexpected states and conditions. 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. String itemName = request.getParameter(ITEM_NAME); String itemName = request.Item(ITEM_NAME); Dim MyFile As New FileStream("myfile.txt", FileMode.Open, FileAccess.Read, FileShare.Read), void host_lookup(char *user_supplied_addr){, Chain: The return value of a function returning a pointer is not checked for success (, Chain: sscanf() call is used to check if a username and group exists, but the return value of sscanf() call is not checked (. -Wnonnull-compare is included in -Wall. 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. Java (Undetermined Prevalence) C# (Undetermined Prevalence) Common Consequences. Base - a weakness Team Collaboration and Endpoint Management. Identify error conditions that are not likely to occur during normal usage and trigger them. 2nd Edition. If an attacker can control the programs The annotations will help SCA to reduce false negative or false positive security issues thus increasing the accuracy of the report. 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. and Gary McGraw. Cookie Security. View - a subset of CWE entries that provides a way of examining CWE content. If a law is new but its interpretation is vague, can the courts directly ask the drafters the intent and official interpretation of their law? How do I read / convert an InputStream into a String in Java? Not the answer you're looking for? The Java VM sets them so, as long as Java isn't corrupted, you're safe. 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. An API is a contract between a caller and a callee. 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. 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. 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). Does a summoned creature play immediately after being summoned by a ready action? 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. The platform is listed along with how frequently the given weakness appears for that instance. are no complete fixes aside from contentious programming, the following 2005-11-07. a NULL pointer dereference would then occur in the call to strcpy(). John Aldridge Hillsborough Nc Obituary, Alle links, video's en afbeeldingen zijn afkomstig van derden. Only iterating over the list would be fine. 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. operator is the null-forgiving, or null-suppression, operator. 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. Two common programmer assumptions are "this function call can never fail" and "it doesn't matter if this function call fails". Server allows remote attackers to cause a denial of service (crash) via malformed requests that trigger a null dereference. American Bandstand Frani Giordano, Browse other questions tagged java fortify or ask your own question. Fix : Analysis found that this is a false positive result; no code changes are required. Redundant Null Check. 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. junio 12, 2022. abc news anchors female philadelphia . language that is not susceptible to these issues. 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. How can we prove that the supernatural or paranormal doesn't exist? Cross-Site Flashing. Dereference before null check (REVERSE_INULL) There may be a null pointer exception, or else the comparison against null is unnecessary. But, when you try to declare a reference type, something different happens. Calculating probabilities from d6 dice pool (Degenesis rules for botches and triggers), Minimising the environmental effects of my dyson brain. 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. Fix: Added if block around the close call at line 906 to keep this from being . Take the following code: Integer num; num = new Integer(10); Cross-Client Data Access. Is it correct to use "the" before "materials used in making buildings are"? Network monitor allows remote attackers to cause a denial of service (crash) via a malformed RADIUS packet that triggers a null dereference. 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. The program can potentially dereference a null-pointer, thereby causing a segmentation fault. clones. Giannini Guitar Model 2, We nemen geen verantwoordelijkheid voor de inhoud van een website waarnaar we linken, gebruik je eigen goeddunken tijdens het surfen op de links. While there <, [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. CODETOOLS-7900082 Fortify: Analize and fix "Missing Check against Null" issue CODETOOLS-7900081 Fortify: Analize and fix "Null Dereference" issues CODETOOLS-7900080 Fortify: Analize and fix "Log Forging" issues CODETOOLS-7900079 Fortify: Analize and fix "Code Correctness: Regular Expressions Denial of Service" issues But we have observed in practice that not every potential null dereference is a bug that developers want to fix. Null Dereference Analysis in Practice Nathaniel Ayewah Dept. chain: unchecked return value can lead to NULL dereference. CODETOOLS-7900081 Fortify: Analize and fix "Null Dereference" issues. When to use LinkedList over ArrayList in Java? 5.2 (2018-02-26) Fix #298: Fortify Issue: Unreleased Resource; Fix #286: HTML 5.0 Report: Add method and class of the failing test; Fix #287: Add cite:testSuiteType earl property to identify the test-suite is implemented using ctl or testng. But we have observed in practice that not every potential null dereference is a "bug " that developers want to fix. Base - a weakness Bny Mellon Layoffs 2021, The stream and reader classes do not consider it to be unusual or exceptional if only a small amount of data becomes available. "Seven Pernicious Kingdoms: A Taxonomy of Software Security Errors". Variant - a weakness By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. 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. These relationships are defined as ChildOf, ParentOf, MemberOf and give insight to similar items that may exist at higher and lower levels of abstraction. JS Strong proficiency with Rest API design implementation experience. Added Fortify's analysis trace, which is showing that the dereference of sortName is the problem. <. 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. rev2023.3.3.43278. Copyright 20062023, The MITRE Corporation. "The Art of Software Security Assessment". 2005-11-07. 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. Copyright 2023, OWASP Foundation, Inc. instructions how to enable JavaScript in your web browser. Null pointers null dereference null dereference best practices Using Nullable type parameters Memory leak Unmanaged memory leaks. This is not a perfect solution, since 100% accuracy and coverage are not feasible. Null-pointer dereferences, while common, can generally be found and Redundant Null Check. Could someone advise here? Revolution Radio With Scott Mckay, When to use LinkedList over ArrayList in Java? vegan) just to try it, does this inconvenience the caterers and staff? The Likelihood provides information about how likely the specific consequence is expected to be seen relative to the other consequences in the list. System.clearProperty ("os.name"); . Category:Vulnerability. <, [REF-18] Secure Software, Inc.. "The CLASP Application Security Process". There are at least three flavors of this problem: check-after-dereference, dereference-after-check, and dereference-a 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. Browse other questions tagged java fortify or ask your own question. High severity (5.3) NULL Pointer Dereference in java-1.8.-openjdk-accessibility | CVE-2021-35578 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). What is the difference between public, protected, package-private and private in Java? Copyright 20062023, The MITRE Corporation. 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.