how to fix null dereference in java fortify

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. This is not a perfect solution, since 100% accuracy and coverage are not feasible. 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. <. Fortify keeps track of the parts that came from the original input. What is the purpose of this D-shaped ring at the base of the tongue on my hiking boots? [REF-961] Object Management Group (OMG). In the following code, the programmer assumes that the system always has To learn more, see our tips on writing great answers. 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. a property named cmd defined. The program can potentially dereference a null-pointer, thereby raising a NullPointerException. occur. In addition, relationships such as PeerOf and CanAlsoBe are defined to show similar weaknesses that the user may want to explore. About an argument in Famine, Affluence and Morality. process, unless exception handling (on some platforms) is invoked, and To learn more, see our tips on writing great answers. PS: Yes, Fortify should know that these properties are secure. The lack of a null terminator in buf can result in a buffer overflow in the subsequent call to strcpy(). These classes simply add the small amount of data to the return buffer, and set the return value to the number of bytes or characters read. 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). McGraw-Hill. (where the weakness exists independent of other weaknesses), [REF-6] Katrina Tsipenyuk, Brian Chess "Writing Secure Code". This table specifies different individual consequences associated with the weakness. Is Java "pass-by-reference" or "pass-by-value"? <, [REF-961] Object Management Group (OMG). 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. Show activity on this post. Pour adhrer l'association, rien de plus simple : une cotisation minimale de 1,50 est demande. 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. 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. When designing a function, make sure you return a value or throw an exception in case of an error. The program can potentially dereference a null pointer, thereby raising Enter the username or e-mail you used in your profile. 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). 2002-12-04. 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. How can we prove that the supernatural or paranormal doesn't exist? Most appsec missions are graded on fixing app vulns, not finding them. 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. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. : Fortify: The method processMessage() in VET360InboundProcessService.java can crash the program by dereferencing a null pointer on line 197. -Wnull-dereference. This argument ignores three important considerations: The following examples read a file into a byte array. Disclaimer: we hebben een nultolerantiebeleid tegen illegale pornografie. rev2023.3.3.43278. chain: unchecked return value can lead to NULL dereference. attacker can intentionally trigger a null pointer dereference, the Clark Atlanta University Music Department, Common Weakness Enumeration. I believe this particular behavior is a gap in the Fortify analyzer implementation, as all other static analysis tools seem to understand the code flow and will not complain about potential null references in this case. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Check the results of all functions that return a value and verify that the value is expected. [REF-62] Mark Dowd, John McDonald This MemberOf Relationships table shows additional CWE Categories and Views that reference this weakness as a member. Palash Sachan 8-Feb-17 13:41pm. 2005-11-07. More information is available Please select a different filter. Because memcpy() assumes that the value is unsigned, it will be interpreted as MAXINT-1 (CWE-195), and therefore will copy far more memory than is likely available to the destination buffer (CWE-787, CWE-788). SSL software allows remote attackers to cause a denial of service (crash) via a crafted SSL/TLS handshake that triggers a null dereference. 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. and Justin Schuh. 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 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. An awesome tip to avoid NPE is to return empty When it comes to these specific properties, you're safe. What is the point of Thrower's Bandolier? issues result in general software reliability problems, but if an CWE, CWSS, CWRAF, and the CWE logo are trademarks of The MITRE Corporation. Connection String Parameter Pollution. The Likelihood provides information about how likely the specific consequence is expected to be seen relative to the other consequences in the list. They are not necessary and expose risk according to the Fortify scan. Why are non-Western countries siding with China in the UN? Thank you for visiting OWASP.org. Identify error conditions that are not likely to occur during normal usage and trigger them. Copyright 20062023, The MITRE Corporation. Stringcmd=System.getProperty("cmd"); CWE is a community-developed list of software and hardware weakness types. environment, ensure that proper locking APIs are used to lock before the Explicitly initialize all your variables and other data stores, either during declaration or just before the first usage. Web-application scanning, also known as dynamic analysis, is a type of test that runs while an application is in a development environment. CODETOOLS-7900082 Fortify: Analize and fix "Missing Check against Null" issue. null dereference-after-store . If an attacker can control the programs [REF-6] Katrina Tsipenyuk, Brian Chess This solution passes the Fortify scan. Java (Undetermined Prevalence) C# (Undetermined Prevalence) Common Consequences. By using this site, you accept the Terms of Use and Rules of Participation. 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. This also passes Fortify's scan: Thanks for contributing an answer to Stack Overflow! ssh component for Go allows clients to cause a denial of service (nil pointer dereference) against SSH servers. Agissons ici, pour que a change l-bas ! Pillar - a weakness that is the most abstract type of weakness and represents a theme for all class/base/variant weaknesses related to it. Note that this code is also vulnerable to a buffer overflow (CWE-119). By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Class - a weakness that is described in a very abstract fashion, typically independent of any specific language or technology. attacker might be able to use the resulting exception to bypass security Does ZnSO4 + H2 at high pressure reverses to Zn + H2SO4? Alle rechten voorbehouden. . These may be for specific named Languages, Operating Systems, Architectures, Paradigms, Technologies, or a class of such platforms. Check the documentation for the Connection object of the type returned by the getConnection() factory method, and see if the methods rollback() and close() Null Dereference. 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. NIST Workshop on Software Security Assurance Tools Techniques and Metrics. However, the code does not check the value returned by pthread_mutex_lock() for errors. 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. Class - a weakness that is described in a very abstract fashion, typically independent of any specific language or technology. This information is often useful in understanding where a weakness fits within the context of external information sources. Use automated static analysis tools that target this type of weakness. 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. Variant - a weakness Team Collaboration and Endpoint Management. Another good example of library abuse is expecting the callee to return trustworthy DNS information to the caller. (Generated from version 2022.4.0.0009 of the Fortify Secure Coding Rulepacks), Fortify Taxonomy: Software Security Errors. Expressions (EXP), SEI CERT C Coding Standard - Guidelines 03. The Java VM sets them so, as long as Java isn't corrupted, you're safe. These may be for specific named Languages, Operating Systems, Architectures, Paradigms, Technologies, or a class of such platforms. In this paper we discuss some of the challenges of using a null dereference analysis in . An unexpected return value could place the system in a state that could lead to a crash or other unintended behaviors. Furthermore, if the end of the file is reached before any characters are read, fgets() returns without writing anything to buf. 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. When a reference has the value null, dereferencing . vegan) just to try it, does this inconvenience the caterers and staff? Most errors and unusual events in Java result in an exception being thrown. Chapter 20, "Checking Returns" Page 624. 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 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. 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.