CVE-2016-5002: Apache XML-RPC XXE Vulnerability
Summary
CVE-2016-5002: Apache XML-RPC XXE Vulnerability. Affects org.apache.xmlrpc:xmlrpc versions < 3.1.3. No fix is published. How to fix ↓
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Background
The Apache XML-RPC library (ws-xmlrpc) version 3.1.3 is an open-source library used in Apache Archiva. It provides functionality for XML-RPC communication. XML-RPC is a remote procedure call (RPC) protocol encoded in XML. It allows clients to make method calls to a server using HTTP as the transport mechanism. The library is widely used in various applications and systems that require remote communication. However, version 3.1.3 of the library is vulnerable to an XML external entity (XXE) vulnerability.
Vulnerability Detail
The XML external entity (XXE) vulnerability in Apache XML-RPC 3.1.3 allows remote attackers to conduct server-side request forgery (SSRF) attacks by exploiting a crafted Document Type Definition (DTD). This vulnerability enables an attacker to read arbitrary files on the server or perform actions on behalf of the server. By sending specially crafted XML requests, an attacker can abuse this vulnerability to bypass security restrictions and access sensitive information or perform unauthorized actions.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround mentioned for this vulnerability. However, as a general best practice, it is recommended to implement input validation and sanitization techniques to prevent XXE attacks. Additionally, restricting access to sensitive files and directories can help mitigate the impact of this vulnerability.
Conclusion
The Apache XML-RPC library version 3.1.3 is vulnerable to an XML external entity (XXE) vulnerability, which can be exploited for server-side request forgery (SSRF) attacks. To mitigate this vulnerability, it is recommended to upgrade the library to a non-vulnerable version and implement input validation and sanitization techniques. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
An XML external entity (XXE) vulnerability is a type of security vulnerability that allows an attacker to read arbitrary files or perform actions on behalf of the server by exploiting the processing of external entities in XML input.
Server-side request forgery (SSRF) is a type of vulnerability that allows an attacker to make requests from the server to other internal or external resources. In the context of this vulnerability, an attacker can use SSRF to access sensitive information or perform unauthorized actions.
You can use Vulert's playground (https://vulert.com/scanner) to check if your application is affected by this vulnerability. Vulert monitors and alerts in real-time for open-source vulnerabilities using just the pom.xml file.
The CVSS score of this vulnerability is 7.8, indicating a high severity level.
There may be known exploits for this vulnerability. It is crucial to address this vulnerability promptly by upgrading the Apache XML-RPC library to a non-vulnerable version.
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