Security Update for squid3
Summary
DLA-478-1: squid3 - security update. Affects squid3 versions < 3.1.20-2.2+deb7u5. Fixed in 3.1.20-2.2+deb7u5. How to fix ↓
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Background
Squid3 is a popular caching proxy that is widely used to improve web performance by caching frequently accessed web content. It acts as an intermediary between clients and servers, storing copies of web pages and resources to serve them quickly to clients upon request. However, several security vulnerabilities have been discovered in Squid3, which could potentially be exploited by attackers to compromise the system or perform denial of service attacks.
Vulnerability Detail
The vulnerabilities in Squid3 include:
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CVE-2016-4051: A buffer overflow vulnerability in Squid cachemgr.cgi allows remote attackers to execute arbitrary code or cause a denial of service (DoS) by providing malicious inputs.
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CVE-2016-4052: A buffer overflow vulnerability in Squid makes it vulnerable to a DoS attack when processing ESI responses.
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CVE-2016-4053: Squid is vulnerable to public information disclosure of the server stack layout when processing ESI responses.
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CVE-2016-4054: Squid is vulnerable to remote code execution when processing ESI responses.
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CVE-2016-4554: Squid is vulnerable to a header smuggling attack that could lead to cache poisoning and bypass of same-origin security policy.
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CVE-2016-4555 and CVE-2016-4556: Squid is vulnerable to a DoS attack when processing ESI responses due to incorrect pointer handling and reference counting.
These vulnerabilities pose a significant risk to the security and stability of systems running Squid3.
How To Fix
Minimum fixed version
3.1.20-2.2+deb7u5
This is the first release that contains the fix.
sudo apt-get install --only-upgrade squid3Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There are no specific workarounds mentioned for these vulnerabilities. It is crucial to apply the security update as soon as possible to mitigate the risks associated with these vulnerabilities.
Conclusion
The vulnerabilities in Squid3 can have severe consequences for the security and stability of systems. It is crucial to apply the recommended security update to protect against potential attacks. For further support and assistance with vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for squid3 →
FAQ
Squid3 is a caching proxy that improves web performance by storing copies of web pages and resources to serve them quickly to clients upon request.
These vulnerabilities can allow attackers to execute arbitrary code, cause denial of service, disclose sensitive information, and bypass security policies.
To fix these vulnerabilities, upgrade to the latest version of Squid3 (3.1.20-2.2+deb7u5 for Debian 7 Wheezy).
No specific workarounds are mentioned for these vulnerabilities. It is recommended to apply the security update.
You can obtain the updated packages from the official Debian repositories or the Squid website.
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