You can drill down to the exact open source component that contains a vulnerability and apply a fix. The Black Duck Security Advisory for CVE-2020-1938 / BDSA-2020-0339. 768 Creativity Industry Park, Also, check the server.xml file. Black Duck’s enhanced vulnerability reports include information from both the NVD security feed and Black Duck Security Advisories, our own proprietary security feed from the Cybersecurity Research Center (CyRC). GhostCat Vulnerability: How to Prevent Unauthorized Access In order to prevent unauthorized access, simply disable the AJP endpoint. The key step is to disable the AJP port. Ghostcat is a vulnerability found in Apache Tomcat versions 6.x, 7.x, 8.x, and 9.x that allows remote code execution in some circumstances. This connection is treated with more trust than a connection such as HTTP, allowing an attacker to exploit it to perform actions that are not intended for … The best way to know what’s in your code is with software composition analysis (SCA). Posted by Tanay Sethi on Wednesday, April 1st, 2020. On February 20, China National Vulnerability Database (CNVD) published a security advisory for CNVD-2020-10487, a severe vulnerability in Apache Tomcat’s Apache JServ Protocol(or AJP). If the AJP Connector service is in use, we recommend that you upgrade Tomcat to version 9.0.31, 8.5.51, or 7.0.100, and then configure the “secret” attribute for the AJP Connector to set AJP protocol authentication credentials. The vulnerability affects versions 6, 7, 8 and 9 of the open source Java servlet container. Firewalls will also assist with preventing access to the server. During the initialization of protocols, AJP should not be there, just HTTP, and/or HTTPS. Update the Apache Tomcat to latest versions 9.0.31, 8.5.51, and 7.0.100 to fix this vulnerability. Firewalls will also assist with preventing access to the server. The connector enabled in Apache/Tomcat server via port 8009. If the AJP Connector service is not used, you can directly upgrade Tomcat to version 9.0.31, 8.5.51, or 7.0.100 for vulnerability fix. Ghostcat is a high-risk file read / include vulnerability in Tomcat. Below we see the default example that ships with the server.xml in the 9.0.31 release.
The best part is that you don’t need to keep rescanning your applications to uncover new vulnerabilities. - Otherwise, you need to figure out if the cluster or reverse server is communicating with the Tomcat AJP Connector service.
Andrew has been working in the IT industry since 1996, ranging from hardware and networking to application development. On the Apache Tomcat Security Advisory page, Ghostcat is described as “AJP Request Injection and potential Remote Code Execution.” The keyword “potential” serves to emphasize that Ghostcat is not an RCE vulnerability by default. Apache Tomcat includes the AJP connector, which is enabled by default and listens on all addresses on port 8009. In addition to the above measures, of course, you can also use firewalls to prevent untrusted sources from accessing the Tomcat AJP Connector service port. Previous: 3 ways to improve your software…, https://github.com/laolisafe/CVE-2020-1938, https://github.com/xindongzhuaizhuai/CVE-2020-1938, https://github.com/YDHCUI/CNVD-2020-10487-Tomcat-Ajp-lfi, https://github.com/nibiwodong/CNVD-2020-10487-Tomcat-ajp-POC, Interactive Application Security Testing (IAST). In short, Black Duck software composition analysis keeps development teams and security teams up to date with any new vulnerabilities that affect the open source components in their applications. In order to prevent unauthorized access, simply disable the AJP endpoint.
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