how to fix null dereference in java fortify

The platform is listed along with how frequently the given weakness appears for that instance. Follow Up: struct sockaddr storage initialization by network format-string. Closed; is cloned by. Use of the Common Weakness Enumeration (CWE) and the associated references from this website are subject to the Terms of Use. "Seven Pernicious Kingdoms: A Taxonomy of Software Security Errors". By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. 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. The annotations will help SCA to reduce false negative or false positive security issues thus increasing the accuracy of the report. David LeBlanc. This is an example of a Project or Chapter Page. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. chain: unchecked return value can lead to NULL dereference. This weakness can be detected using dynamic tools and techniques that interact with the software using large test suites with many diverse inputs, such as fuzz testing (fuzzing), robustness testing, and fault injection. [A-Z a-z 0-9]*$")){ throw new IllegalArgumentException(); } message.setSubject(subject) This still gets flagged by Fortify. What can a lawyer do if the client wants him to be acquitted of everything despite serious evidence? This is not a perfect solution, since 100% accuracy and coverage are not feasible. Fortify Null Dereference in Java; Chain Validation test; Apigee issue with PUT and POST operation; Query annotation not working with and / or operators; org.springframework.beans.factory.BeanDefinitionStoreException: Failed to process import candidates for configuration class Web-application scanning, also known as dynamic analysis, is a type of test that runs while an application is in a development environment. NIST Workshop on Software Security Assurance Tools Techniques and Metrics. It can be disabled with the -Wno-nonnull-compare option. But the stream and reader classes do not consider it unusual or exceptional if only a small amount of data becomes available. Many modern techniques use data flow analysis to minimize the number of false positives. Stringcmd=System.getProperty("cmd"); <. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. 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. 2019-07-15. Is it suspicious or odd to stand by the gate of a GA airport watching the planes? 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. What fortify do not like is the fact that you initialize the variable with null first, without condition, and then change it. This behavior makes it important for programmers to examine the return value from read() and other IO methods to ensure that they receive the amount of data they expect. 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. If the program is performing an atomic operation, it can leave the system in an inconsistent state. In .NET, it is not uncommon for programmers to misunderstand Read() and related methods that are part of many System.IO classes. Asking for help, clarification, or responding to other answers. a NullPointerException. 856867 Defect: The method prettyPrintXML1() in IAMWebServiceDelegateImpl.java can crash the program by dereferencing a null pointer on line 906. 2002-12-04. Revolution Radio With Scott Mckay, When it comes to these specific properties, you're safe. The two main view structures are Slices (flat lists) and Graphs (containing relationships between entries). I'd prefer to get rid of the finding vs. just write it off. attacker can intentionally trigger a null pointer dereference, the NIST Workshop on Software Security Assurance Tools Techniques and Metrics. The product does not check the return value from a method or function, which can prevent it from detecting unexpected states and conditions. How Intuit democratizes AI development across teams through reusability. 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. (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. Find centralized, trusted content and collaborate around the technologies you use most. Here is a code snippet: public class Example { private Collection<Auth> Authorities; public Example (SomeUser user) { for (String role: user.getAuth ()) { //This is where Fortify gives me a null dereference Authorities.add (new Auth (role)); } } private List<String> getAuth () { return null; } } java fortify Share Improve this question int *ptr; int *ptr; After the declaration of an integer pointer variable, we store the address of 'x' variable to the pointer variable 'ptr'. More specific than a Pillar Weakness, but more general than a Base Weakness. Is this from a fortify web scan, or from a static code analysis? Most errors and unusual events in Java result in an exception being thrown. a NULL pointer dereference would then occur in the call to strcpy(). environment so that cmd is not defined, the program throws a null This MemberOf Relationships table shows additional CWE Categories and Views that reference this weakness as a member. Het is gebruikers verboden materiaal te plaatsen waarop personen jonger dan 18 jaar worden afgebeeld. Veracode's dynamic analysis scan automates the process, returning detailed guidance on security flaws to help developers fix them for good. Certain versions of content ("Material") accessible here may contain branding from Hewlett-Packard Company (now HP Inc.) and Hewlett Packard Enterprise Company. attacker might be able to use the resulting exception to bypass security Chat client allows remote attackers to cause a denial of service (crash) via a passive DCC request with an invalid ID number, which causes a null dereference. For example, if a program fails to call chdir() after calling chroot(), it violates the contract that specifies how to change the active root directory in a secure fashion. null. Connect and share knowledge within a single location that is structured and easy to search. [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. How do I efficiently iterate over each entry in a Java Map? For trivial true positives, these are ones that just never need to be fixed. 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. (where the weakness is a quality issue that might indirectly make it easier to introduce security-relevant weaknesses or make them more difficult to detect). Even when exception handling is being used, it can still be very difficult to return the software to a safe state of operation. This example takes an IP address from a user, verifies that it is well formed and then looks up the hostname and copies it into a buffer. ; Fix #308: Status color of tests in left frame; Fix #284: Enhance TEAM Engine to evaluate if core conformance classes are configured Copy link. The choice could be made to use a language that is not susceptible to these issues. 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: Whenever we use the "return early" code pattern, Fortify is not able to understand it and raises a "possible null dereference" warning. 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. 10 Avoiding Attempt to Dereference Null Object Errors - YouTube 0:00 / 8:00 10 Avoiding Attempt to Dereference Null Object Errors 4,029 views Oct 22, 2014 In this episode we look at 3 common. It's simply a check to make sure the variable is not null. 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. Does a summoned creature play immediately after being summoned by a ready action? including race conditions and simple programming omissions. report. Category - a CWE entry that contains a set of other entries that share a common characteristic. vegan) just to try it, does this inconvenience the caterers and staff? Warn if the compiler detects paths that trigger erroneous or undefined behavior due to dereferencing a null pointer. [REF-44] Michael Howard, David LeBlanc <, [REF-962] Object Management Group (OMG). Dynamic analysis is a great way to uncover error-handling flaws. Note that this code is also vulnerable to a buffer overflow (CWE-119). If you preorder a special airline meal (e.g. Network monitor allows remote attackers to cause a denial of service (crash) via a malformed Q.931, which triggers a null dereference. CWE is a community-developed list of software and hardware weakness types. American Bandstand Frani Giordano, Compliance Failure. In the following code, the programmer assumes that the system always has How to tell Jackson to ignore a field during serialization if its value is null? Note that this code is also vulnerable to a buffer overflow . Stepson gives milf step mom deep anal creampie in big ass. What fortify do not like is the fact that you initialize the variable with null first, without condition, and then change it. Java/JSP. Thanks for contributing an answer to Stack Overflow! More specific than a Pillar Weakness, but more general than a Base Weakness. While there are no complete fixes aside from conscientious programming, the following steps will go a long way to ensure that NULL pointer dereferences do not occur. Connect and share knowledge within a single location that is structured and easy to search. Take the following code: Integer num; num = new Integer(10); However, its // behavior isn't consistent. If an attacker can control the program's environment so that "cmd" is not defined, the program throws a NULL pointer exception when it attempts to call the trim() method. OS allows remote attackers to cause a denial of service (crash from null dereference) or execute arbitrary code via a crafted request during authentication protocol selection. The following VB.NET code does not check to make sure that it has read 50 bytes from myfile.txt. String os = System.getProperty ("os.name"); if (os.equalsIgnoreCase ("Windows 95") ) System.out.println ("Not supported"); Enter the username or e-mail you used in your profile. So mark them as Not an issue and move on. Suppress the warning (if Fortify allows that). When a reference has the value null, dereferencing . These relationships are defined as ChildOf, ParentOf, MemberOf and give insight to similar items that may exist at higher and lower levels of abstraction. Whenever we use the "return early" code pattern, Fortify is not able to understand it and raises a "possible null dereference" warning. 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. 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 { 2006. The lack of a null terminator in buf can result in a buffer overflow in the subsequent call to strcpy(). null dereference fortify fix java Follow us. Disadvantages Of Group Learning, The following Java Virtual Machine versions are supported: Java 8; Java 11; Java 17; while may produce spurious null dereference 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. The NULL pointer dereference weakness occurs where application dereferences a pointer that is expected to be a valid address but instead is equal to NULL. 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 are the differences between a HashMap and a Hashtable in Java? 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. The TOP 25 Errors List will be updated regularly and will be posted at both the SANS and MITRE sites. I think I know why I'm getting it , just wanted to know what would be the best way to fix the issue. 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). This table specifies different individual consequences associated with the weakness. Take the following code: Integer num; num = new Integer(10); So you have a couple of choices: Ignore the warning. TRESPASSING! The programmer has lost the opportunity to record diagnostic information. 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. [REF-62] Mark Dowd, John McDonald set them to NULL once they are freed: If you are working with a multi-threaded or otherwise asynchronous But, when you try to declare a reference type, something different happens. A null-pointer dereference takes place when a pointer with a value of Does ZnSO4 + H2 at high pressure reverses to Zn + H2SO4? We nemen geen verantwoordelijkheid voor de inhoud van een website waarnaar we linken, gebruik je eigen goeddunken tijdens het surfen op de links. 2016-01. Mature pregnant Mom ass fucked by horny Stepson, Perfect Pussy cant Stop Squirting all over herself, Shokugeki no Soma Todokoro Megumi Hard Sex, naughty teen in sexy lace lingerie dancing and seducing boy sucking him and riding him hard amateur, Slutty wife Jayla de Angelis gets assfucked by the hung doctor in POV. This website uses cookies to analyze our traffic and only share that information with our analytics partners. CWE, CWSS, CWRAF, and the CWE logo are trademarks of The MITRE Corporation. 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. . (Java) and to compare it with existing bug reports on the tool to test its efficacy. Pour adhrer l'association, rien de plus simple : une cotisation minimale de 1,50 est demande. 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. These relationships are defined as ChildOf, ParentOf, MemberOf and give insight to similar items that may exist at higher and lower levels of abstraction. When this method is called by a thread that is not the owner, the return value reflects a best-effort approximation of current lock status. How do I align things in the following tabular environment? Dereference before null check (REVERSE_INULL) There may be a null pointer exception, or else the comparison against null is unnecessary. The Optional class contains methods that can be used to make programs shorter and more intuitive [].. For Benchmark, we've seen it report it both ways. Without handling the error, there is no way to know. and Gary McGraw. 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. can be prevented. Reply Cancel Cancel; Top Take the following code: Integer num; num = new Integer(10); Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') Fix : Analysis found that this is a false positive result; no code changes are required. and Justin Schuh. PS: Yes, Fortify should know that these properties are secure. If you are working with a multithreaded or otherwise asynchronous environment, ensure that proper locking APIs are used to lock before the if statement; and unlock when it has finished. Expressions (EXP), https://samate.nist.gov/SSATTM_Content/papers/Seven%20Pernicious%20Kingdoms%20-%20Taxonomy%20of%20Sw%20Security%20Errors%20-%20Tsipenyuk%20-%20Chess%20-%20McGraw.pdf, https://www.microsoftpressstore.com/store/writing-secure-code-9780735617223, Cybersecurity and Infrastructure Security Agency, Homeland Security Systems Engineering and Development Institute, Detect and handle standard library errors, The CERT Oracle Secure Coding Standard for Java (2011), Provided Demonstrative Example and suggested CERT reference, updated Common_Consequences, Relationships, Other_Notes, Taxonomy_Mappings, updated Background_Details, Demonstrative_Examples, Description, Observed_Examples, Other_Notes, Potential_Mitigations, updated Common_Consequences, Demonstrative_Examples, References, updated Demonstrative_Examples, Potential_Mitigations, References, updated Demonstrative_Examples, References, updated Common_Consequences, Demonstrative_Examples, Relationships, Taxonomy_Mappings, updated Common_Consequences, References, Relationships, updated Demonstrative_Examples, Potential_Mitigations, updated Demonstrative_Examples, Relationships, Taxonomy_Mappings, updated Applicable_Platforms, References, Relationships, Taxonomy_Mappings, updated References, Relationships, Taxonomy_Mappings, updated Demonstrative_Examples, Observed_Examples, Relationships, Weakness_Ordinalities. issues result in general software reliability problems, but if an It should be investigated and fixed OR suppressed as not a bug. 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. 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. The two main view structures are Slices (flat lists) and Graphs (containing relationships between entries). Added Fortify's analysis trace, which is showing that the dereference of sortName is the problem. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. . Monitor the software for any unexpected behavior. This example takes an IP address from a user, verifies that it is well formed and then looks up the hostname and copies it into a buffer. 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. that is still mostly independent of a resource or technology, but with sufficient details to provide specific methods for detection and prevention. Vulnerability Asking for help, clarification, or responding to other answers. Thank you for visiting OWASP.org. 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 call cr.getPassword() may return null value in the com.hazelcast.client.connection.nio.ClientConnectionManagerImpl.encodeAuthenticationRequest(boolean, SerializationService, ClientPrincipal) method. High severity (3.7) NULL Pointer Dereference in java-1.8.-openjdk-accessibility | CVE-2019-2962 CODETOOLS-7900082 Fortify: Analize and fix "Missing Check against Null" issue. NULL pointer dereferences are frequently resultant from rarely encountered error conditions, since these are most likely to escape detection during the testing phases. 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. In this tutorial, we'll take a look at the need to check for null in Java and various alternatives that . citrus county livestock regulations; how many points did klay thompson score last night. 2016-01. If Fortify SCA can be put into a pipeline, it can also be hooked to fix issues automatically (although care must be taken to avoid situations like the Debian OpenSSL PRNG vulnerability, which was not a vulnerability until a security-focused static code analyzer suggested a fix that ended up being July 2019. pylint. The different Modes of Introduction provide information about how and when this weakness may be introduced. This table specifies different individual consequences associated with the weakness. 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). Base level weaknesses typically describe issues in terms of 2 or 3 of the following dimensions: behavior, property, technology, language, and resource. that is linked to a certain type of product, typically involving a specific language or technology. When to use LinkedList over ArrayList in Java? Furthermore, if the end of the file is reached before any characters are read, fgets() returns without writing anything to buf. Removed issues. corrected in a simple way. 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. As of September 1, 2017, the Material is now offered by Micro Focus, a separately owned and operated company. One can also violate the caller-callee contract from the other side. Apple. 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-pointer dereferences, while common, can generally be found and The unary prefix ! "24 Deadly Sins of Software Security". Convert byte[] to String (text data) The below example convert a string to a byte array or byte[] and vice versa. So mark them as Not an issue and move on. <. When to use LinkedList over ArrayList in Java? 2. 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? Alle links, video's en afbeeldingen zijn afkomstig van derden. 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 argument ignores three important considerations: The following examples read a file into a byte array. Pillar - a weakness that is the most abstract type of weakness and represents a theme for all class/base/variant weaknesses related to it. 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 . Only iterating over the list would be fine. steps will go a long way to ensure that null-pointer dereferences do not Abstract. (Generated from version 2022.1.0.0007 of the Fortify Secure Coding Rulepacks) Exceptions. This table shows the weaknesses and high level categories that are related to this weakness. 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. Copyright 2023, OWASP Foundation, Inc. instructions how to enable JavaScript in your web browser.

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