Squid - Denial of Service Vulnerability
Summary
DLA-1267-1: squid - security update. Affects squid versions < 2.7.STABLE9-4.1+deb7u3. Fixed in 2.7.STABLE9-4.1+deb7u3. How to fix ↓
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Background
Squid is a high-performance proxy caching server for web clients. It is designed to improve the response time and reduce bandwidth usage by caching and reusing frequently requested web pages. Squid is widely used as a proxy server in various environments, including corporate networks, ISPs, and educational institutions. However, a vulnerability has been discovered in Squid that could allow remote attackers to trigger a denial of service (DoS) condition.
Vulnerability Detail
The vulnerability, identified as CVE-2018-1000027, is caused by incorrect pointer handling in Squid. This flaw can be exploited by a remote client delivering certain HTTP requests in conjunction with specific trusted server responses involving the processing of ESI (Edge Side Includes) responses or downloading of intermediate CA (Certificate Authority) certificates. By exploiting this vulnerability, an attacker can trigger a DoS condition, impacting all clients accessing the Squid service.
How To Fix
Minimum fixed version
2.7.STABLE9-4.1+deb7u3
This is the first release that contains the fix.
sudo apt-get install --only-upgrade squidTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There is no known workaround for this vulnerability. It is essential to apply the provided fix by upgrading the Squid package to the patched version.
Conclusion
In conclusion, Squid is vulnerable to a denial of service attack due to incorrect pointer handling. To mitigate this vulnerability, it is crucial to upgrade the Squid package to the patched version. No known workarounds are available, so applying the fix is essential. For further support on vulnerability remediation, you can contact DevNack.com.
See every vulnerability recorded for squid →
FAQ
Squid is a high-performance proxy caching server for web clients. It improves response time and reduces bandwidth usage by caching frequently requested web pages.
The vulnerability allows remote attackers to trigger a denial of service condition, affecting all clients accessing the Squid service.
To fix this vulnerability, upgrade the Squid package to version 2.7.STABLE9-4.1+deb7u3 or later.
No, there is no known workaround for this vulnerability. It is crucial to apply the provided fix by upgrading the Squid package.
You can find more information about Debian LTS security advisories, including how to apply updates and frequently asked questions, on the Debian Wiki page dedicated to LTS (Long Term Support).
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