Chains can involve more than two weaknesses, and in some cases, they might have a tree-like structure. If the program is performing an atomic operation, it can leave the system in an inconsistent state. View - a subset of CWE entries that provides a way of examining CWE content. 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(). ( A girl said this after she killed a demon and saved MC). and Gary McGraw. Fix : Analysis found that this is a false positive result; no code changes are required. 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. () . Stepson gives milf step mom deep anal creampie in big ass. A Community-Developed List of Software & Hardware Weakness Types, Class: Not Language-Specific (Undetermined Prevalence), Technical Impact: Unexpected State; DoS: Crash, Exit, or Restart. Requirements specification: The choice could be made to use a Copyright 20062023, The MITRE Corporation. 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. 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. View - a subset of CWE entries that provides a way of examining CWE content. Il suffit de nous contacter ! int *ptr; int *ptr; After the declaration of an integer pointer variable, we store the address of 'x' variable to the pointer variable 'ptr'. 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 Android application has registered to handle a URL when sent an intent: The application assumes the URL will always be included in the intent. I got Fortify findings back and I'm getting a null dereference. What fortify do not like is the fact that you initialize the variable with null first, without condition, and then change it. Stringcmd=System.getProperty("cmd"); Why are non-Western countries siding with China in the UN? 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. (where the weakness exists independent of other weaknesses), [REF-6] Katrina Tsipenyuk, Brian Chess What is the point of Thrower's Bandolier? It is not uncommon for Java programmers to misunderstand read() and related methods that are part of many java.io classes. Microsoft Press. We set fields to "null" in many places in our code and Fortify is good with that. American Bandstand Frani Giordano, The program can dereference a null-pointer because it does not check the return value of a function that might return null. But attackers are skilled at finding unexpected paths through programs, particularly when exceptions are involved. If you preorder a special airline meal (e.g. 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. Fortify Software in partnership with FindBugs has launched the Java Open Review (JOR) Project. In addition, relationships such as PeerOf and CanAlsoBe are defined to show similar weaknesses that the user may want to explore. This can cause DoDangerousOperation() to operate on an unexpected value. operator is the logical negation operator. (Or use the ternary operator if you prefer). sharwood's butter chicken slow cooker larry murphy bally sports detroit how to fix null dereference in java fortify. 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. Connection String Parameter Pollution. The program can dereference a null-pointer because it does not check the return value of a function that might return null. 2012-09-11. Anyone have experience with this one? The following VB.NET code does not check to make sure that it has read 50 bytes from myfile.txt. An unexpected return value could place the system in a state that could lead to a crash or other unintended behaviors. CODETOOLS-7900078 Fortify: Analize and fix "Redundant Null Check" issues. When this happens, CWE refers to X as "primary" to Y, and Y is "resultant" from X. This MemberOf Relationships table shows additional CWE Categories and Views that reference this weakness as a member. Ignoring a method's return value can cause the program to overlook unexpected states and conditions. Take the following code: Integer num; num = new Integer(10); So you have a couple of choices: Ignore the warning. 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. 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. 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. <, [REF-961] Object Management Group (OMG). It serves as a common language, a measuring stick for security tools, and as a baseline for weakness identification, mitigation, and prevention efforts. Is there a single-word adjective for "having exceptionally strong moral principles"? Java (Undetermined Prevalence) C# (Undetermined Prevalence) Common Consequences. Can archive.org's Wayback Machine ignore some query terms? All rights reserved. It doesn't matter whether I handle the error or allow the program to die with a segmentation fault when it tries to dereference the null pointer." 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 . In order to avoid data races, correctly written programs must check the result of thread synchronization functions and appropriately handle all errors, either by attempting to recover from them or reporting them to higher levels. Note that this code is also vulnerable to a buffer overflow . Null-pointer errors are usually the result of one or more programmer assumptions being violated. Class level weaknesses typically describe issues in terms of 1 or 2 of the following dimensions: behavior, property, and resource. Does a barbarian benefit from the fast movement ability while wearing medium armor? that is still mostly independent of a resource or technology, but with sufficient details to provide specific methods for detection and prevention. 2005-11-07. "24 Deadly Sins of Software Security". -Wnonnull-compare is included in -Wall. The issue is that if you take data from an external source, then an attacker can use that source to manipulate your path. (Java) and to compare it with existing bug reports on the tool to test its efficacy. NIST. 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. It is impossible for the program to perform a graceful exit if required. What is the purpose of this D-shaped ring at the base of the tongue on my hiking boots? 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". Theres still some work to be done. Certain versions of content ("Material") accessible here may contain branding from Hewlett-Packard Company (now HP Inc.) and Hewlett Packard Enterprise Company. 2019-07-15. Availability: Null-pointer dereferences invariably result in the Fortify found 2 "Null Dereference" issues. Not the answer you're looking for? Penticton Regional Hospital Diagnostic Imaging, 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. Why is this sentence from The Great Gatsby grammatical? 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. Find centralized, trusted content and collaborate around the technologies you use most. The different Modes of Introduction provide information about how and when this weakness may be introduced. environment so that cmd is not defined, the program throws a null The program can potentially dereference a null-pointer, thereby raising a NullPointerException. This also passes Fortify's scan: Thanks for contributing an answer to Stack Overflow! failure of the process. Another good example of library abuse is expecting the callee to return trustworthy DNS information to the caller. occur. 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. The programmer expects that when fgets() returns, buf will contain a null-terminated string of length 9 or less. This table specifies different individual consequences associated with the weakness. Instead use String.valueOf (object). Server allows remote attackers to cause a denial of service (crash) via malformed requests that trigger a null dereference. Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2. SSL software allows remote attackers to cause a denial of service (crash) via a crafted SSL/TLS handshake that triggers a null dereference. Many modern techniques use data flow analysis to minimize the number of false positives. The same occurs with the presence of every form in html/jsp (x)/asp (x) page, that are suspect of CSRF weakness. 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. Before using a pointer, ensure that it is not equal to NULL: When freeing pointers, ensure they are not set to NULL, and be sure to The program can potentially dereference a null-pointer, thereby causing a segmentation fault. Closed; is cloned by. The following function attempts to acquire a lock in order to perform operations on a shared resource. The code loops through a set of users, reading a private data file for each user. What video game is Charlie playing in Poker Face S01E07? 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. Notice how that can never be possible since the method returns early with a 'false' value on the previous 'if' statement. Page 183. NULL pointer dereferences are frequently resultant from rarely encountered error conditions, since these are most likely to escape detection during the testing phases. 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 { [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. 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. 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.
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how to fix null dereference in java fortify