how to fix null dereference in java fortify

JS Strong proficiency with Rest API design implementation experience. vegan) just to try it, does this inconvenience the caterers and staff? 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. It serves as a common language, a measuring stick for security tools, and as a baseline for weakness identification, mitigation, and prevention efforts. 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. 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. Base - a weakness The program can potentially dereference a null-pointer, thereby raising a NullPointerException. CODETOOLS-7900080 Fortify: Analize and 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. CWE is a community-developed list of software and hardware weakness types. For example, the owner may be momentarily null even if there are threads trying to acquire the lock but have not yet done so . Find centralized, trusted content and collaborate around the technologies you use most. Most appsec missions are graded on fixing app vulns, not finding them. The two main view structures are Slices (flat lists) and Graphs (containing relationships between entries). NULL is used as though it pointed to a valid memory area. To learn more, see our tips on writing great answers. issues result in general software reliability problems, but if an The programmer has lost the opportunity to record diagnostic information. 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. The following code does not check to see if the string returned by the Item property is null before calling the member function Equals(), potentially causing a NULL dereference. But the stream and reader classes do not consider it unusual or exceptional if only a small amount of data becomes available. Software Security | Null Dereference - Micro Focus How Intuit democratizes AI development across teams through reusability. A method returning a List should per convention never return null but an empty List as default "empty" value. 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. These relationships are defined as ChildOf, ParentOf, MemberOf and give insight to similar items that may exist at higher and lower levels of abstraction. Just about every serious attack on a software system begins with the violation of a programmer's assumptions. Notice that the return value is not checked before the memcpy operation (CWE-252), so -1 can be passed as the size argument to memcpy() (CWE-805). expedia advert music 2021; 3rd florida infantry regiment; sheetz spiked slushies ingredients If there is a more properplace to file these types of bugs feel free to share and I'll proceed to file the bug there. Null pointers null dereference null dereference best practices Using Nullable type parameters Memory leak Unmanaged memory leaks. Ignoring a method's return value can cause the program to overlook unexpected states and conditions. operator is the null-forgiving, or null-suppression, operator. It should be investigated and fixed OR suppressed as not a bug. -Wnonnull-compare is included in -Wall. Pillar - a weakness that is the most abstract type of weakness and represents a theme for all class/base/variant weaknesses related to it. even then, little can be done to salvage the process. 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. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. This user is already logged in to another session. CWE - CWE-252: Unchecked Return Value (4.10) - Mitre Corporation Is it possible to get Fortify to properly interpret C# Null-Conditional CWE, CWSS, CWRAF, and the CWE logo are trademarks of The MITRE Corporation. Network monitor allows remote attackers to cause a denial of service (crash) or execute arbitrary code via malformed packets that cause a NULL pointer dereference. rev2023.3.3.43278. Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') -Wnull-dereference. attacker can intentionally trigger a null pointer dereference, the if statement; and unlock when it has finished. PVS-Studio is a tool for detecting bugs and security weaknesses in the source code of programs, written in C, C++, C# and Java. Most errors and unusual events in Java result in an exception being thrown. When the URL is not present, the call to getStringExtra() will return null, thus causing a null pointer exception when length() is called. how to fix null dereference in java fortify Generally, null variables, references and collections are tricky to handle in Java code.They are not only hard to identify but also complex to deal with. Unchecked return value leads to resultant integer overflow and code execution. 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? NULL Pointer Dereference in java-1.8.0-openjdk-accessibility | CVE-2019 Copyright 20062023, The MITRE Corporation. "24 Deadly Sins of Software Security". However, the code does not check the value returned by pthread_mutex_lock() for errors. For Benchmark, we've seen it report it both ways. Disadvantages Of Group Learning, 2005-11-07. The code loops through a set of users, reading a private data file for each user. In this tutorial, we'll take a look at the need to check for null in Java and various alternatives that . Note that this code is also vulnerable to a buffer overflow . Common Weakness Enumeration. We nemen geen verantwoordelijkheid voor de inhoud van een website waarnaar we linken, gebruik je eigen goeddunken tijdens het surfen op de links. Take the following code: Integer num; num = new Integer(10); of Computer Science University of Maryland College Park, MD ayewah@cs.umd.edu William Pugh Dept. 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. 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. 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). Could someone advise here? cmd=cmd.trim(); Null-pointer dereference issues can occur through a number of flaws, The program can dereference a null-pointer because it does not check the return value of a function that might return null. The following Java Virtual Machine versions are supported: Java 8; Java 11; Java 17; while may produce spurious null dereference reports. Best Practice for Suppressing Fortify SCA Findings 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. Null Dereference Analysis in Practice Nathaniel Ayewah Dept. LKML Archive on lore.kernel.org help / color / mirror / Atom feed * [PATCH] dm: fix dax_dev NULL dereference @ 2019-07-30 11:37 Pankaj Gupta 2019-07-30 11:38 ` Pankaj Gupta 0 siblings, 1 reply; 7+ messages in thread From: Pankaj Gupta @ 2019-07-30 11:37 UTC (permalink / raw) To: snitzer, dan.j.williams Cc: dm-devel, linux-nvdimm, linux-fsdevel, linux-kernel, agk, pagupta 'Murphy Zhou' reports . A Community-Developed List of Software & Hardware Weakness Types, Technical Impact: DoS: Crash, Exit, or Restart, Technical Impact: Execute Unauthorized Code or Commands; Read Memory; Modify Memory. NULL Pointer Dereference in java-1.8.0-openjdk-accessibility | CVE-2021 How can I find out which sectors are used by files on NTFS? Calculating probabilities from d6 dice pool (Degenesis rules for botches and triggers). 1st Edition. void host_lookup(char *user_supplied_addr){, if("com.example.URLHandler.openURL".equals(intent.getAction())) {. 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. serve to prevent null-pointer dereferences. process, unless exception handling (on some platforms) is invoked, and "Automated Source Code Reliability Measure (ASCRM)". This MemberOf Relationships table shows additional CWE Categories and Views that reference this weakness as a member. NIST Workshop on Software Security Assurance Tools Techniques and Metrics. In addition, relationships such as PeerOf and CanAlsoBe are defined to show similar weaknesses that the user may want to explore. This also passes Fortify's scan: Thanks for contributing an answer to Stack Overflow! Java/JSP. David LeBlanc. Chapter 7, "Program Building Blocks" Page 341. They will always result in the crash of the The text was updated successfully, but these errors were encountered: cmheazel self-assigned this Jan 8, 2018 The best way to avoid memory leaks in C++ is to have as few new/delete calls at the program level as possible ideally NONE. ssh component for Go allows clients to cause a denial of service (nil pointer dereference) against SSH servers. John Aldridge Hillsborough Nc Obituary, report. 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 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. <, [REF-1031] "Null pointer / Null dereferencing". This table shows the weaknesses and high level categories that are related to this weakness. ImmuniWeb. Variant - a weakness CODETOOLS-7900078 Fortify: Analize and fix "Redundant Null Check" issues. [PATCH] dm: fix dax_dev NULL dereference pointer exception when it attempts to call the trim() method. NIST. public class MyClass {. Is it suspicious or odd to stand by the gate of a GA airport watching the planes? This can cause DoDangerousOperation() to operate on an unexpected value. Follows a very simple code sample that should reproduce the issue: public override bool Equals (object obj) { var typedObj = obj as SomeCustomClass; if (typedObj == null) return false; return this.Name == typedObj.Name; } In this simple excerpt Fortify complains that "typedObj" can be null in the return statement. The program can potentially dereference a null pointer, thereby raising The The play-webgoat repository contains an example web app that uses the Play framework. 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). Alle links, video's en afbeeldingen zijn afkomstig van derden. 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. Palash Sachan 8-Feb-17 13:41pm. I'd prefer to get rid of the finding vs. just write it off. There is no guarantee that the amount of data returned is equal to the amount of data requested. Can archive.org's Wayback Machine ignore some query terms? Does ZnSO4 + H2 at high pressure reverses to Zn + H2SO4? In addition, relationships such as PeerOf and CanAlsoBe are defined to show similar weaknesses that the user may want to explore. Not the answer you're looking for? [A-Z a-z 0-9]*$")){ throw new IllegalArgumentException(); } message.setSubject(subject) This still gets flagged by Fortify. Another good example of library abuse is expecting the callee to return trustworthy DNS information to the caller. How do I align things in the following tabular environment? is incorrect. This table specifies different individual consequences associated with the weakness. failure of the process. Fortify is complaining about a Null Dereference when I set a field to null: But that seems really silly. When you assign the value of 10 on the second line, your value of 10 is written into the memory location referred to by x. 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. Most null pointer "Security problems caused by dereferencing null . 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. how to fix null dereference in java fortify More information is available Please select a different filter. Abstract. Base level weaknesses typically describe issues in terms of 2 or 3 of the following dimensions: behavior, property, technology, language, and resource. Network monitor allows remote attackers to cause a denial of service (crash) via a malformed Q.931, which triggers a null dereference. Null pointer errors are usually the result of int *ptr; int *ptr; After the declaration of an integer pointer variable, we store the address of 'x' variable to the pointer variable 'ptr'. Use of the Common Weakness Enumeration (CWE) and the associated references from this website are subject to the Terms of Use. Software Security | Missing Check against Null - Micro Focus 2012-09-11. operator is the logical negation operator. The program can potentially dereference a null-pointer, thereby raising a NullPointerException. Asking for help, clarification, or responding to other answers. Explanation Null-pointer errors are usually the result of one or more programmer assumptions being violated. [REF-62] Mark Dowd, John McDonald (Or use the ternary operator if you prefer). For more information, please refer to our General Disclaimer. There are at least three flavors of this problem: check-after-dereference, dereference-after-check, and dereference-after-store. Example . 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 to fix null dereference in java fortify 2023