how to fix null dereference in java fortify

Content Provider URI Injection. Fix: Commented out the debug lines to the logger. set them to NULL once they are freed: If you are working with a multi-threaded or otherwise asynchronous This MemberOf Relationships table shows additional CWE Categories and Views that reference this weakness as a member. The SAST tool used was Fortify SCA, (and obviously if httpInputStream is different from null, to avoid a possible Null Dereference by invoking the close() method). This table specifies different individual consequences associated with the weakness. Added Fortify's analysis trace, which is showing that the dereference of sortName is the problem. Null pointers null dereference null dereference best practices Using Nullable type parameters Memory leak Unmanaged memory leaks. It should be investigated and fixed OR suppressed as not a bug. Null-pointer dereferences, while common, can generally be found and corrected in a simple way. This type of 'return early' pattern is very common with validation as it avoids nested scopes thus making the code easier to read in general. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. 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. NIST Workshop on Software Security Assurance Tools Techniques and Metrics. <, [REF-18] Secure Software, Inc.. "The CLASP Application Security Process". Not the answer you're looking for? Here is a code snippet: getAuth() should not return null. and Justin Schuh. Vulnerability (Java) and to compare it with existing bug reports on the tool to test its efficacy. View - a subset of CWE entries that provides a way of examining CWE content. can be prevented. cmd=cmd.trim(); Null-pointer dereference issues can occur through a number of flaws, 2019-07-15. Redundant Null Check. steps will go a long way to ensure that null-pointer dereferences do not Deerlake Middle School Teachers, 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: Explicitly initialize all your variables and other data stores, either during declaration or just before the first usage. This table specifies different individual consequences associated with the 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. Making statements based on opinion; back them up with references or personal experience. Java/JSP. What is the point of Thrower's Bandolier? Example . The programmer assumes that the files are always 1 kilobyte in size and therefore ignores the return value from Read(). "24 Deadly Sins of Software Security". Bny Mellon Layoffs 2021, The following code does not check to see if memory allocation succeeded before attempting to use the pointer returned by malloc(). To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Most errors and unusual events in Java result in an exception being thrown. <, [REF-1031] "Null pointer / Null dereferencing". Il suffit de nous contacter ! The program can dereference a null-pointer because it does not check the return value of a function that might return null. 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. A password reset link will be sent to you by email. Returns the thread that currently owns the write lock, or null if not owned. Dereferencing follows the memory address stored in a reference, to the place in memory where the actual object resides. NIST Workshop on Software Security Assurance Tools Techniques and Metrics. [REF-44] Michael Howard, David LeBlanc 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(). Agissons ici, pour que a change l-bas ! It is important to remember here to return the literal and not the char being checked. one or more programmer assumptions being violated. In the following code, the programmer assumes that the system always has [REF-6] Katrina Tsipenyuk, Brian Chess While there "Automated Source Code Security Measure (ASCSM)". Copyright 2023 Open Text Corporation. Fortify Software in partnership with FindBugs has launched the Java Open Review (JOR) Project. Category:Vulnerability. If you preorder a special airline meal (e.g. is incorrect. Addison Wesley. environment, ensure that proper locking APIs are used to lock before the In rare circumstances, when NULL is equivalent to the 0x0 memory address and privileged code can access it, then writing or reading memory is possible, which may lead to code execution. Double-check the stack trace of the exception, and also check the surrounding lines in case the line number is wrong. Palash Sachan 8-Feb-17 13:41pm. Category:Code Quality ssh component for Go allows clients to cause a denial of service (nil pointer dereference) against SSH servers. NULL pointer dereferences are frequently resultant from rarely encountered error conditions, since these are most likely to escape detection during the testing phases. 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. The Likelihood provides information about how likely the specific consequence is expected to be seen relative to the other consequences in the list. The program can dereference a null-pointer because it does not check the return value of a function that might return null. High severity (5.3) NULL Pointer Dereference in java-1.8.-openjdk-accessibility | CVE-2021-35578 Thanks for contributing an answer to Stack Overflow! Base level weaknesses typically describe issues in terms of 2 or 3 of the following dimensions: behavior, property, technology, language, and resource. I think I know why I'm getting it , just wanted to know what would be the best way to fix the issue. Is this from a fortify web scan, or from a static code analysis? Explanation Null-pointer errors are usually the result of one or more programmer assumptions being violated. and Gary McGraw. 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. Connection conn = null; Boolean myConn = false; try { if (conn == null) { conn = DatabaseUtil.getConnection (); myConn = true; } result = DbClass.getObject (conn, otherParameters); }catch (DatabaseException de) { throw de; }catch (SQLException sqle) { throw new DatabaseException ("Error Message"); }finally { if (myConn && conn != null) { try { Fix : Analysis found that this is a false positive result; no code changes are required. 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. 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. We nemen geen verantwoordelijkheid voor de inhoud van een website waarnaar we linken, gebruik je eigen goeddunken tijdens het surfen op de links. Monitor the software for any unexpected behavior. does pass the Fortify review. rev2023.3.3.43278. American Bandstand Frani Giordano, If an attacker can create a smaller file, the program will recycle the remainder of the data from the previous user and treat it as though it belongs to the attacker. Browse other questions tagged java fortify or ask your own question. This website uses cookies to analyze our traffic and only share that information with our analytics partners. The Java VM sets them so, as long as Java isn't corrupted, you're safe. 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. Network monitor allows remote attackers to cause a denial of service (crash) via a malformed RADIUS packet that triggers a null dereference. Unfortunately our Fortify scan takes several hours to run. In this tutorial, we'll take a look at the need to check for null in Java and various alternatives that . null. But if an I/O error occurs, fgets() will not null-terminate buf. Notice how that can never be possible since the method returns early with a 'false' value on the previous 'if' statement. [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. Anyone have experience with this one? There is no guarantee that the amount of data returned is equal to the amount of data requested. which best describes the pillbugs organ of respiration; jesse pearson obituary; ion select placeholder color; best fishing spots in dupage county 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. 2. Wij hebben geen controle over de inhoud van deze sites. 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. What is the correct way to screw wall and ceiling drywalls? Dereference before null check. Making statements based on opinion; back them up with references or personal experience. Extended Description NULL pointer dereference issues can occur through a number of flaws, including race conditions, and simple programming omissions. Did the call to malloc() fail because req_size was too large or because there were too many requests being handled at the same time? 2010. A Community-Developed List of Software & Hardware Weakness Types, Class: Not Language-Specific (Undetermined Prevalence), Technical Impact: Unexpected State; DoS: Crash, Exit, or Restart. Explanation Null-pointer errors are usually the result of one or more programmer assumptions being violated. The program can potentially dereference a null-pointer, thereby raising a NullPointerException. Can archive.org's Wayback Machine ignore some query terms? 2.1. 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. Could someone advise here? -Wnull-dereference. [REF-62] Mark Dowd, John McDonald 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. Chains can involve more than two weaknesses, and in some cases, they might have a tree-like structure. public class MyClass {. Class - a weakness that is described in a very abstract fashion, typically independent of any specific language or technology. process, unless exception handling (on some platforms) is invoked, and Most errors and unusual events in Java result in an exception being thrown. Real ghetto African girls smoking with their pussies. Redundant Null Check. Revolution Radio With Scott Mckay, The program can potentially dereference a null-pointer, thereby raising a NullPointerException. Wikipedia. What is a NullPointerException, and how do I fix it? Ignoring a method's return value can cause the program to overlook unexpected states and conditions. The unary prefix ! <, [REF-962] Object Management Group (OMG). Fortify SCA is used to find and fix following software vulnerabilities at the root cause: Buffer Overflow, Command Injection, Cross-Site Scripting, Denial of Service, Format String, Integer Overflow, . This information is often useful in understanding where a weakness fits within the context of external information sources. 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. Use of the Common Weakness Enumeration (CWE) and the associated references from this website are subject to the Terms of Use. citrus county livestock regulations; how many points did klay thompson score last night. 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. <, [REF-1032] "Null Reference Creation and Null Pointer Dereference". Pillar - a weakness that is the most abstract type of weakness and represents a theme for all class/base/variant weaknesses related to it. The following function attempts to acquire a lock in order to perform operations on a shared resource. Alle rechten voorbehouden. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Show activity on this post. There are at least three flavors of this problem: check-after-dereference, dereference-after-check, and dereference-a [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.

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