Subversion - Remote Assertion DoS and Spoofing Vulnerabilities
Summary
DSA-3231-1: subversion - security update. Affects subversion versions < 1.6.17dfsg-4+deb7u9. Fixed in 1.6.17dfsg-4+deb7u9. How to fix ↓
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Background
Subversion is a popular version control system used for managing and tracking changes to files and directories. It provides a centralized repository for storing and sharing code, allowing multiple users to collaborate on projects. Subversion supports various protocols, including HTTP, HTTPS, and SVN, making it versatile and widely adopted in software development workflows. However, certain versions of Subversion are susceptible to remote assertion denial-of-service (DoS) attacks and spoofing vulnerabilities.
Vulnerability Detail
The first vulnerability, identified as CVE-2015-0248, affects Subversion mod_dav_svn and svnserve. It allows remote attackers to trigger a DoS condition by sending specific requests with dynamically evaluated revision numbers. This vulnerability can lead to service disruption and potential crashes.
The second vulnerability, known as CVE-2015-0251, affects Subversion HTTP servers. It enables attackers to spoof svn:author property values for new revisions by exploiting specially crafted v1 HTTP protocol request sequences. This vulnerability can be leveraged to manipulate revision history and potentially deceive users about the origin of code changes.
How To Fix
Minimum fixed version
1.6.17dfsg-4+deb7u9
This is the first release that contains the fix.
sudo apt-get install --only-upgrade subversionTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Conclusion
Subversion versions prior to the fixed versions mentioned in this report are vulnerable to remote assertion DoS and spoofing attacks. It is highly recommended to upgrade to the latest patched versions to mitigate these vulnerabilities and ensure the security of your Subversion installation. For further assistance or support in vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for subversion →
FAQ
Subversion is a version control system used for managing and tracking changes to files and directories in software development projects. It provides a centralized repository and supports various protocols for accessing and manipulating code.
A remote assertion DoS vulnerability refers to a security flaw that allows remote attackers to trigger assertion failures in software, leading to a denial-of-service condition. In the case of Subversion, certain requests with dynamically evaluated revision numbers can cause the server to crash or become unresponsive.
The spoofing vulnerability in Subversion HTTP servers enables attackers to manipulate svn:author property values for new revisions. This can be used to deceive users about the origin of code changes, potentially leading to trust issues and security concerns.
No, only specific versions of Subversion are affected. The fixed versions for the stable distribution (wheezy), upcoming stable distribution (jessie), and unstable distribution (sid) are mentioned in the 'how_to_fix' section.
To ensure the security of your Subversion installation, it is crucial to regularly update to the latest patched versions provided by the Subversion project. Additionally, following best practices for secure configuration and access control can further enhance the overall security posture.
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