null dereference fortify fix java

I know we could change the code to remove it, but that would be changing the structure of our code because of a problem in the tool. Exceptions. This would produce the expected null dereference findings, which could be further tuned to take the null-sanitizing methods into account. . We can fix this issue just by replacing the .equals() method with== so lets implement == symbol and try to compile our code. Java/JSP Abstract The program can dereference a null-pointer because it does not check the return value of a function that might return null. 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". So mark them as Not an issue and move on. Null Dereference (Code Quality, Control Flow): The method ThroughDate() in Program.cs can dereference a null pointer, thereby raising a NullException. at com.fortify.sca.frontend.FrontEndSession.runFrontEnd(FrontEndSession.java:193) [fortify-sca-18.20.1071.jar:?] JavaDereference before null check . References As // such, we are adding this other way to determine if . The purpose of this Release Notes document is to announce the release of the ES 5.16. A fully runnable web app written in Java, it supports analysis by Static (SAST), Dynamic (DAST), and Runtime (IAST) tools that support Java. For an attacker it provides an opportunity to stress the system in unexpected ways. If maybeNull is null, the conditional will resolve to false, and will not enter the block where maybeNull.OtherMember is accessed. In my attempts I see that Fortify may lack knowledge of null-sanitizing methods but any method will quiet down the Null Dereference rule. We have these rule packs installed that seem to be relevant to the .Net, Name: Fortify Secure Coding Rules, Core, .NETVersion: 2017.3.0.0008ID: D57210E5-E762-4112-97DD-019E61D32D0ESKU: RUL13002, Version: 2017.3.0.0008ID: 557BCC56-CD42-43A7-B4FE-CDD00D58577ESKU: RUL13027Provides coverage of security relevant APIs in various extended and third-party .NET libraries including Log4Net(TM) and the Microsoft EnterpriseLibrary(TM). In this example, the variable x is an int and Java will initialize it to 0 for you. 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. The call cr.getPassword() may return null value in the com.hazelcast.client.connection.nio.ClientConnectionManagerImpl.encodeAuthenticationRequest(boolean, SerializationService, ClientPrincipal) method. Investigate instances where Fortify has identified a null pointer as a potential security flaw. In this paper we discuss some of the challenges of using a null dereference CODETOOLS-7900082 Fortify: Analize and fix "Missing Check against Null" issue CODETOOLS-7900081 Fortify: Analize and fix "Null Dereference" issues CODETOOLS-7900080 Fortify: Analize and fix "Log Forging" issues CODETOOLS-7900079 Fortify: Analize and fix "Code Correctness: Regular Expressions Denial of Service" issues CVE-2010-2949 A NULL pointer dereference flaw was found in the way the Quagga bgpd We would like to show you a description here but the site wont allow us. share. fill_foo checks if the pointer has a value, not if the pointer has a valid value. Thanks to both of you; that's much clearer now. spelling and grammar. . Extended Description NULL pointer dereference issues can occur through a number of flaws, including race conditions, and simple programming omissions. Try this: if (connection != null && conection.State != ConnectionState.Closed) { conection.Close (); } But better, use a using block around your connection creation so it is automatically closed and disposed when it goes out of scope. Example. But we have observed in practice that not every potential null dereference is a "bug " that developers want to fix. Once the value of the location is obtained by the pointer, this pointer is considered dereferenced. Basically, yes. Warn if the compiler detects paths that trigger erroneous or undefined behavior due to dereferencing a null pointer. Linux reduced time to fix new defects, found by Coverity Scan, from 120 days to 5 days. Roseanne But what exactly does it mean to "dereference a null pointer"? Fix: Made minor changes in the code to resolve the null dereference and . The program can potentially dereference a null-pointer, thereby raising a NullException. 2 Answers Sorted by: 4 Fortify is raising an issue, not an error because you are taken input from the process's environment and then opening a path with it without doing any input filtering. 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. Asking for help, clarification, or responding to other answers. Closed. vent ever possible null dereference. 2Null Dereference 2.1 null null dereference-after-store . Fix : Analysis found that this is a false positive result; no code changes are required. It serves as a common language, a measuring stick for security tools, and as a baseline for weakness identification, mitigation, and prevention efforts. Difference Between FileInputStream and FileReader in Java, Introduction about the error with example. (Generated from version 2022.4.0.0009 of the Fortify Secure Coding Rulepacks), Fortify Taxonomy: Software Security Errors. If you get an exception, don't catch it and return null, instead wrap and rethrow the exception. IsNullOrEmpty is a convenience method that enables you to simultaneously test whether a String is Nothing or its value is Empty. Jk Robbins wrote:The FindBugs tool is telling me that line 5 contains a null pointer dereference to the id variable but I don't see the problem. Is it plausible for constructed languages to be used to affect thought and control or mold people towards desired outcomes? Available in C# 8.0 and later, the unary postfix ! Chain: The return value of a function returning a pointer is not checked for success ( CWE-252) resulting in the later use of an uninitialized variable ( CWE-456) and a null pointer dereference ( CWE-476) CVE-2007-3798. . NullPointerException is a runtime condition where we try to access or modify an object which has not been initialized yet. if (foo == null) { foo.setBar (val); . } Before using a pointer, ensure that it is not equal to NULL: if (pointer1 != NULL) { /* make use of pointer1 */ /* . It is equivalent to the following code: result = s Is Nothing OrElse s = String.Empty. TimeZone getOffset(int, int, int, int, int, int) Method in Java with Examples, ZoneOffset ofHoursMinutesSeconds(int, int, int) method in Java with Examples, SimpleTimeZone setStartRule(int, int, int) method in Java with Examples, SimpleTimeZone setEndRule(int, int, int) method in Java with Examples, HijrahDate of(int, int, int) method in Java with Example, IsoChronology date(int, int, int) method in Java with Example, JapaneseChronology date(int, int, int) method in Java with Example, JapaneseDate of(int, int, int) method in Java with Example, JapaneseDate of(JapaneseEra,int, int, int) method in Java with Example, MinguoChronology date(int, int, int) method in Java with Example. Jk Robbins wrote:Thanks, you are correct, I meant line 9 and I see the error now. It is important to remember here to return the literal and not the char being checked. Test every line of code and potential execution path. They should be investigated and fixed OR suppressed as not a bug. email is in use. I've been searching for an explanation of this message and can't find anything that clearly explains it. Issue Links clones CODETOOLS-7900081 Fortify: Analize and fix "Null Dereference" issues Closed relates to CODETOOLS-7900046 Complete Fortify code updates Closed Activity All Comments Work Log History Activity If not, leave it as null. Midwest Athletics Cheer, They are not only hard to identify but also complex to deal with. #icon5632{font-size:;background:;padding:;border-radius:;color:;} But you must first determine if this is a real security concern or a false positive. "Leadership is nature's way of removing morons from the productive flow" - Dogbert Articles by Winston can be found here. Teams. Noncompliant Code Example. It is not uncommon for Java programmers to misunderstand read() and related methods that are part of many java.io classes. VES-6699. Fix: Modified rules and code to no longer dereference a null pointer. In the most recent project scanned, only 1 of 24 Null Dereference issues found was legitamite. Find and fix defects in your Java, C/C++, C#, JavaScript, Ruby, or Python open source project for free . Q&A for work. Believe me, using "dereference" to mean "set to null" is a misconception. So mark them as Not an issue and move on. Is it correct to use "the" before "materials used in making buildings are"? Should Fortify be handling this correctly by default(and we have something misconfigured)? Description. 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. Dereference actually means we access an object from heap memory using a suitable variable. So mark them as Not an issue and move on. When indirection operator (*) is used with the pointer variable, then it is known as dereferencing a pointer. 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. -- Ted Nelson. Team Collaboration and Endpoint Management. What it is complaining about is that if you take data from an external source, then an attacker can use that source to manipulate your path. When it comes to these specific properties, you're safe. : 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. 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. One of the common issues reported by Fortify is the Path Manipulation issue. By clicking Sign up for GitHub, you agree to our terms of service and Fortify flags this for null dereference. I don't see a problem in line 5. Fortify is raising an issue, not an error because you are taken input from the process's environment and then opening a path with it without doing any input filtering. PS: Yes, Fortify should know that these properties are secure. This message takes into account the current system culture. 1 solution Solution 1 Nothing. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. 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. $ c:/jdk8/bin/javac -cp lib/commons-lang3-3.7.jar -d build NPE.java$ java -cp 'lib/commons-lang3-3.7.jar;build' npe.NPE fooarg is foodangerousLength is 3protected length is 3StringUtils protected length is 3(as much dangerous) length is 3StringUtils protected (no thanks to Fortify tracking) length is 3Called a method of an object returned by a method: 1OS Windows 7 is supportedOS Windows 7 is supported$ sourceanalyzer -scan -cp lib/commons-lang3-3.7.jar NPE.java[error]: Your license does not allow access to Fortify SCA for Pythoncom.fortify.licensing.UnlicensedCapabilityException: Your license does not allow access to Fortify SCA for Python at com.fortify.licensing.Licensing.getCapabilityConfig(Licensing.java:120) ~[fortify-common-18.20.0.1071.jar:?] Fortify-Issue-300 Null Dereference issues #302. Generally, null variables, references and collections are tricky to handle in Java code. In summary, nobody writes C++ code that way, so don't do it! Using Kolmogorov complexity to measure difficulty of problems? 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. The list of things beyond my ability to control is . 101 if (os.equalsIgnoreCase("Windows 95")) { 102 log("OS " os " is not supported"); 103 } else { 104 log("OS " os " is supported"); 105 } 106 107 // Fortify fails to catch a possible NPE as it loses track of the null 108 // resource after passing it to another method. If the destination Raster is null, a new Raster will be created. An attack signature is a unique arrangement of information that can be used to identify an attacker's attempt to exploit a known operating system or application vulnerability. For example: org.apache.commons.lang3.StringUtils.defaultIfEmpty() CVE-2009-3620. However, its // behavior isn't consistent. Already on GitHub? 20 Bay Street, 11th Floor Toronto, Ontario, Canada M5J 2N8 : 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. Dereferencing a null pointer An impossible checked cast . Security problems result from trusting input. at com.fortify.licensing.Licensing.requireCapability(Licensing.java:63) ~[fortify-common-18.20.0.1071.jar:?] NPD vulnerability can be exploited by hackers to maliciously crash a process to cause a denial of service or execute an arbitrary code under specific conditions. about checking values between rows with dynamic table created using java script. The main theme of Dereferencing is placing the memory address into the reference. Null-pointer errors are usually the result of one or more programmer assumptions being violated. Issue Links. we have been using fortify tool in our code to check for security vulnerabilities.