CVE-2020-11991 Explained : Impact and Mitigation
Learn about CVE-2020-11991 affecting Apache Cocoon 2.1.0 to 2.1.12, allowing unauthorized access to server files via manipulated XML. Find mitigation steps and long-term security practices.
Apache Cocoon 2.1.0 to 2.1.12 is affected by a vulnerability that allows an attacker to access any file on the server system by using a specially crafted XML with external system entities.
Understanding CVE-2020-11991
This CVE involves an information disclosure vulnerability in Apache Cocoon.
What is CVE-2020-11991?
CVE-2020-11991 is a security vulnerability in Apache Cocoon versions 2.1.0 to 2.1.12 that enables unauthorized access to server files through a manipulated XML file.
The Impact of CVE-2020-11991
The vulnerability allows an attacker to exploit the StreamGenerator component to access sensitive files on the server system, potentially leading to unauthorized information disclosure.
Technical Details of CVE-2020-11991
This section provides detailed technical information about the vulnerability.
Vulnerability Description
When processing user-provided XML using the StreamGenerator, Apache Cocoon is susceptible to external system entity attacks, enabling unauthorized file access.
Affected Systems and Versions
- Product: Apache Cocoon
- Versions Affected: Apache Cocoon 2.1.0 to 2.1.12
Exploitation Mechanism
The vulnerability arises from the mishandling of XML parsing in the StreamGenerator, allowing an attacker to include external system entities in a crafted XML to access server files.
Mitigation and Prevention
Protecting systems from CVE-2020-11991 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply security patches or updates provided by Apache to mitigate the vulnerability.
- Restrict access to the Apache Cocoon server to authorized personnel only.
- Monitor server logs for any suspicious activities.
Long-Term Security Practices
- Regularly update and patch Apache Cocoon and other software components to prevent security vulnerabilities.
- Implement secure coding practices to mitigate the risk of similar vulnerabilities in the future.
Patching and Updates
- Stay informed about security advisories from Apache and apply patches promptly to address known vulnerabilities.