Private personal information may include a password, phone number, geographic location, personal messages, credit card number, etc. Note that this code is also vulnerable to a buffer overflow . How can I reduce false positives and maintain the rule? Alternate Terms Relationships . Once the value of the location is obtained by the pointer, this pointer is considered dereferenced. In the most recent project scanned, only 1 of 24 Null Dereference issues found was legitamite. Check the documentation for the Connection object of the type returned by the getConnection() factory method, and see if the methods rollback() and close() will even throw an exception. The method ThroughDate intentionally uses the C# 6.0 null-conditional operator to guard against null values, and is designed to safely return null if any of the values it processes happen to be null. The suggested remedy to this problem is to use a whitelist of trusted directories as valid inputs; and, reject everything else. Now, let us move to the solution for this error. I have problem to understand how is that solving original issue - path in configuration file How to resolve Path Manipulation error given by fortify? Poor code quality leads to unpredictable behavior. A null pointer dereference, on the other hand, is a specific type of null dereference that occurs when you try to access an object reference that has a null value in a programming language that uses pointers. application of binomial distribution in civil engineering eames replica lounge chair review eames replica lounge chair review Even if you were to add input filtering, the odds are low that Fortify were to recognize it and stop producing the issue. So mark them as Not an issue and move on. For instance, what's wrong with this code? ; Updated: 29 Sep 2017 To translate Scala code for Fortify to scan, you must be a current Lightbend subscriber. When it comes to these specific properties, you're safe. I have a solution to the Fortify Path Manipulation issues. I did not try that. at com.fortify.licensing.Licensing.requireCapability(Licensing.java:63) ~[fortify-common-18.20.0.1071.jar:?] Searching it online showed only a match in a SonarQube plugin that may be reusing the GUID by mistake. : System.getProperty may return NULL NPE.java(98) : allocated -> allocated : os may be null NPE.java(101) : allocated -> used : os.equalsIgnoreCase() : os used without null check[A423998C51F661CE8B2EB269BB0AF58D : low : Poor Logging Practice : Use of a System Output Stream : structural ] NPE.java(43)[5494E2A573D3F6F3F5F24DE49D893068 : low : J2EE Bad Practices : Leftover Debug Code : structural ] NPE.java(56)$ cat -n NPE.java 1 package npe; 2 3 import org.apache.commons.lang3.StringUtils; 4 5 public class NPE { 6 int v; 7 8 9 public NPE(int v) { 10 this.v = v; 11 } 12 13 14 public static int dangerousLength(String s) { 15 return s.length(); 16 } 17 18 19 public String stringify() { 20 if (v != 0) { 21 return "non-0"; 22 } else { 23 return null; 24 } 25 } 26 27 28 public NPE frugalCopy() { 29 if (v != 0) { 30 return new NPE(v); 31 } else { 32 return null; 33 } 34 } 35 36 37 public int getV() { 38 return v; 39 } 40 41 42 public static void log(String s) { 43 System.out.println(s); 44 } 45 46 47 public static String defaultIfEmpty(String s, String v) { 48 if (s == null || s.length() == 0) { 49 return v; 50 } else { 51 return s; 52 } 53 } 54 55 56 public static void main(String[] args) { 57 String arg = null; 58 if (args.length > 0) { 59 arg = args[0]; 60 } 61 log("arg is " arg); 62 63 // Fortify fails to catch a possible NPE when the null is passed as an 64 // argument. Copyright 2023 Open Text Corporation. pass = getPassword (); jadejaan over 5 years ago I am trying to validate SMTP header so that fortify can identified it as a fix. #icon876:hover{color:;background:;} info@thermapure.com, Wishing everyone a peaceful and green holiday from here in Ventura! We also report experimental results for XYLEM, Coverity Prevent, Fortify SCA, Eclipse and FindBugs, and observe of Computer Science University of Maryland College Park, MD pugh@cs.umd.edu Abstract Many analysis techniques have been proposed to determine when a potentially null value may be You won't find it anywhere in any official Java documents. dstenger closed this as completed in #302 on Feb 22, 2018. dstenger added this to the 5.2 milestone on Feb 22, 2018. : Fortify: On line 768 of HistoryDAOImpl.java, execute() uses hibernate to execute a dynamic SQL statement built with input coming from an untrusted source Fix : Analysis found that this finding is a false positive; no code changes are required. Take the following code: Integer num; num = new Integer(10); Closed; relates to. An API is a contract between a caller and a callee. operator is the null-forgiving, or null-suppression, operator. It is not uncommon for Java programmers to misunderstand read() and related methods that are part of many java.io classes. How can we prove that the supernatural or paranormal doesn't exist? So "dereferencing a null pointer" means trying to do something to the object that it's pointing to. Fix #300: Fortify Issue: Null Dereference; Fix #304: Result view (tree) is missing of wms-client test; Fix #276: Enhance impementation of SOAP request to be able to handle elements in CDATA; Fix #280: Improve report text for core conformance classes; Fix #278: Detailed test messages with XML special characters are incomplete Java does not allow dereferencing does not redefine the term "dereferencing". \Projects\UnreleasedStream> java HttpURLConnectionReader http != null inputStream != null Exception: java.io.IOExpection: stream is closed http != null inputStream != null . Trying to understand how to get this basic Fourier Series, How to handle a hobby that makes income in US. (Generated from version 2022.1.0.0007 of the Fortify Secure Coding Rulepacks) Exceptions. 109 String os2 = defaultIfEmpty(System.getProperty("os.name"), null); 110 if (os2.equalsIgnoreCase("Windows 95")) { 111 log("OS " os2 " is not supported"); 112 } else { 113 log("OS " os2 " is supported"); 114 } 115 } 116 }. 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. I do not know why and how the Data Flow syntax differs from the Control Flow one. In this paper we discuss some of the challenges of using a null dereference analysis in practice, and reasons why developers may not feel it necessary to change code to prevent ever possible null dereference. Thanks for contributing an answer to Information Security Stack Exchange! Bangkok Bank Branch Code List, Null Dereference C/C++ C#/VB.NET/ASP.NET Java/JSP Abstract clones. The opinions expressed above are the personal opinions of the authors, not of Micro Focus. Extended Description NULL pointer dereference issues can occur through a number of flaws, including race conditions, and simple programming omissions. . Note that this code is also vulnerable to a buffer overflow . The issue is that if you take data from an external source, then an attacker can use that source to manipulate your path. Null dereference is a commonly occurring defect in Java programs, and many static-analysis tools identify such defects. Learn more . Network Operations Management (NNM and Network Automation). Just about every serious attack on a software system begins with the violation of a programmer's assumptions. Thus, enabling the attacker do delete files or otherwise compromise your system. The following Java Virtual Machine versions are supported: Java 8; Java 11; Java 17; . There are at least three flavors of this problem: check-after-dereference, dereference-after-check, and dereference-after-store. The Java VM sets them so, as long as Java isn't corrupted, you're safe. Some uses of the null pointer are: a) To initialize a pointer variable when that pointer variable isnt assigned any valid memory address yet. The best answers are voted up and rise to the top, Not the answer you're looking for? Warn if the compiler detects paths that trigger erroneous or undefined behavior due to dereferencing a null pointer. The purpose of this Release Notes document is to announce the release of the ES 5.14. . 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. 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. As of September 1, 2017, the Material is now offered by Micro Focus, a separately owned and operated company. As a counter-example, though, note that calling free() or delete on a NULL in C and C++ is guaranteed to be a no-op. Also I failed to reproduce the case. Null pointer dereference (NPD) is a widespread vulnerability that occurs whenever an executing program attempts to dereference a null pointer. The value is then dereferenced without a null check in ClientAuthenticationCodec.encodeRequest call: Because your release of resources is conditional on the state of a boolean variable and encased in another try block, the static analyzer must be deciding that rollback() and close() are not guaranteed to execute.. But what exactly does it mean to "dereference a null pointer"? Symantec security products include an extensive database of attack signatures. #icon8226:hover{color:;background:;} 800-366-2022 If You Got this error while youre compiling your code? Posted 29-Sep-17 0:30am OriginalGriff Comments Here is a POC The Optional class contains methods that can be used to make programs shorter and more intuitive [].. C#/VB.NET/ASP.NET. Note that you can copy references without accessing the object it references. Chances are they have and don't get it. Here, we will follow the below-mentioned points to understand and eradicate the error alongside checking the outputs with minor tweaks in our sample code. 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. Dereference before null check (REVERSE_INULL) There may be a null pointer exception, or else the . If you have encountered it a lot, that just means it is a popular misconception . Null Dereference Issue New: May 7, 2019 which is not fixed and in the parser, it checks cwe no in also the sample you provided does not contain any cwe no in and in fortify parser it uses this method to extract cwe no which raise problem: If you never set a variable to null you can never have an unexpected null. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. All rights reserved. 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.