how to fix null dereference in java fortify

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. The method isXML () in jquery-1.4.4.js can dereference a null pointer on line 4283, thereby raising a NullExcpetion. The platform is listed along with how frequently the given weakness appears for that instance. I'd prefer to get rid of the finding vs. just write it off. Team Collaboration and Endpoint Management. The method isXML in jquery-1.4.4.js can dereference a null pointer on line 4283, thereby raising a NullExcpetion. More information is available Please select a different filter. More specific than a Pillar Weakness, but more general than a Base Weakness. Extended Description NULL pointer dereference issues can occur through a number of flaws, including race conditions, and simple programming omissions. "The Art of Software Security Assessment". 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. Java/JSP. 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. C#/VB.NET/ASP.NET. Dereference before null check. The The play-webgoat repository contains an example web app that uses the Play framework. For example, if a coder subclasses SecureRandom and returns a non-random value, the contract is violated. System.clearProperty ("os.name"); . Web-application scanning, also known as dynamic analysis, is a type of test that runs while an application is in a development environment. chain: unchecked return value can lead to NULL dereference. attacker might be able to use the resulting exception to bypass security () . "Automated Source Code Security Measure (ASCSM)". CODETOOLS-7900082 Fortify: Analize and fix "Missing Check against Null" issue. Palash Sachan 8-Feb-17 13:41pm. This user is already logged in to another session. <. public class MyClass {. Asking for help, clarification, or responding to other answers. The call cr.getPassword() may return null value in the com.hazelcast.client.connection.nio.ClientConnectionManagerImpl.encodeAuthenticationRequest(boolean, SerializationService, ClientPrincipal) method. 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. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. 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). It can be disabled with the -Wno-nonnull-compare option. 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. McGraw-Hill. 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. The two main view structures are Slices (flat lists) and Graphs (containing relationships between entries). (where the weakness exists independent of other weaknesses), [REF-6] Katrina Tsipenyuk, Brian Chess We nemen geen verantwoordelijkheid voor de inhoud van een website waarnaar we linken, gebruik je eigen goeddunken tijdens het surfen op de links. POSIX (POS), SEI CERT Perl Coding Standard - Guidelines 03. The program can potentially dereference a null-pointer, thereby raising a NullPointerException. rev2023.3.3.43278. 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. Redundant Null Check. Follow Up: struct sockaddr storage initialization by network format-string. When the URL is not present, the call to getStringExtra() will return null, thus causing a null pointer exception when length() is called. Category - a CWE entry that contains a set of other entries that share a common characteristic. Closed. ASCSM-CWE-252-resource. <, [REF-1031] "Null pointer / Null dereferencing". Variant - a weakness Explanation Null-pointer errors are usually the result of one or more programmer assumptions being violated. Check the results of all functions that return a value and verify that the value is expected. Furthermore, if the end of the file is reached before any characters are read, fgets() returns without writing anything to buf. These may be for specific named Languages, Operating Systems, Architectures, Paradigms, Technologies, or a class of such platforms. Class level weaknesses typically describe issues in terms of 1 or 2 of the following dimensions: behavior, property, and resource. attacker can intentionally trigger a null pointer dereference, the Convert byte[] to String (text data) The below example convert a string to a byte array or byte[] and vice versa. Explicitly initialize all your variables and other data stores, either during declaration or just before the first usage. 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. Certain versions of content ("Material") accessible here may contain branding from Hewlett-Packard Company (now HP Inc.) and Hewlett Packard Enterprise Company. . Use automated static analysis tools that target this type of weakness. 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. PS: Yes, Fortify should know that these properties are secure. 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. 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 getAuth(){ return new ArrayList<>(); } 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 case " Null Dereference ": return 476; // Fortify reports weak randomness issues under Obsolete by ESAPI, rather than in // the Insecure Randomness category if it thinks you are using ESAPI. How can I find out which sectors are used by files on NTFS? Theres still some work to be done. Copyright 2023 Open Text Corporation. TRESPASSING! This also passes Fortify's scan: Thanks for contributing an answer to Stack Overflow! Closed; is cloned by. 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 Network monitor allows remote attackers to cause a denial of service (crash) via a malformed RADIUS packet that triggers a null dereference. Apple. The product does not check the return value from a method or function, which can prevent it from detecting unexpected states and conditions. Ensure that you account for all possible return values from the function. Check the results of all functions that return a value and verify that the value is non-null before acting upon it. There is no guarantee that the amount of data returned is equal to the amount of data requested. In this paper we discuss some of the challenges of using a null dereference analysis in . My code is GPL licensed, can I issue a license to have my code be distributed in a specific MIT licensed project? Base - a weakness Share Improve this answer Follow edited Jun 4, 2019 at 17:08 answered Jun 4, 2019 at 17:01 Thierry 5,170 33 39 ( A girl said this after she killed a demon and saved MC). pointer exception when it attempts to call the trim() method. Just about every serious attack on a software system begins with the violation of a programmer's assumptions. Calculating probabilities from d6 dice pool (Degenesis rules for botches and triggers), Minimising the environmental effects of my dyson brain. corrected in a simple way. (Generated from version 2022.1.0.0007 of the Fortify Secure Coding Rulepacks) Exceptions. I'll try this solution. 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. 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. Returns the thread that currently owns the write lock, or null if not owned. More specific than a Base weakness. 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. What is the difference between public, protected, package-private and private in Java? 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(). An awesome tip to avoid NPE is to return empty When it comes to these specific properties, you're safe. Even when exception handling is being used, it can still be very difficult to return the software to a safe state of operation. How Intuit democratizes AI development across teams through reusability. 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. 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 This information is often useful in understanding where a weakness fits within the context of external information sources. American Bandstand Frani Giordano, CODETOOLS-7900078 Fortify: Analize and fix "Redundant Null Check" issues. Or was it caused by a memory leak that has built up over time? and John Viega. 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. Agissons ici, pour que a change l-bas ! The lack of a null terminator in buf can result in a buffer overflow in the subsequent call to strcpy(). The unary prefix ! Why is this sentence from The Great Gatsby grammatical? 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. Harvest Property Management Lodi, Ca, Find centralized, trusted content and collaborate around the technologies you use most. There is no guarantee that the amount of data returned is equal to the amount of data requested. Real ghetto African girls smoking with their pussies. 2016-01. The following Java Virtual Machine versions are supported: Java 8; Java 11; Java 17; while may produce spurious null dereference reports. 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. set them to NULL once they are freed: If you are working with a multi-threaded or otherwise asynchronous . By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. a NullPointerException. are no complete fixes aside from contentious programming, the following Chapter 20, "Checking Returns" Page 624. It is not uncommon for Java programmers to misunderstand read() and related methods that are part of many java.io classes. I have a solution to the Fortify Path Manipulation issues. CWE, CWSS, CWRAF, and the CWE logo are trademarks of The MITRE Corporation. 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). 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. Does a barbarian benefit from the fast movement ability while wearing medium armor? Note that this code is also vulnerable to a buffer overflow (CWE-119). Concatenating a string with null is safe. 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. that is still mostly independent of a resource or technology, but with sufficient details to provide specific methods for detection and prevention. 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. null. (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. 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. 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. Browse other questions tagged java fortify or ask your own question. 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. ASCRM-CWE-252-data. 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.

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