Sensitive Information Exposure in Squid
Summary
CVE-2022-41317: An issue was discovered in Squid 4.9 through 4.17 and 5.0.6 through 5.6. Affects squid across 2 version ranges.
< 5.7-r0
>= 1521895e24671463bf590cabcdbd2acf637ed2c1, < 5bb2694408e7a42897e9efe775361579d8864de8
Fixed in 5.7-r0. How to fix ↓
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Background
Squid is a popular open-source proxy caching server that is widely used to improve web performance and reduce bandwidth usage. It acts as an intermediary between clients and web servers, caching frequently accessed content to provide faster responses. Squid is known for its robustness, scalability, and extensive feature set. However, a vulnerability has been discovered in versions 4.9 through 4.17 and 5.0.6 through 5.6 of Squid, which can lead to the exposure of sensitive information about clients using the proxy.
Vulnerability Detail
The vulnerability, identified as CVE-2022-41317, arises due to inconsistent handling of internal URIs within Squid. An attacker can exploit this flaw by sending an HTTPS request to an internal cache manager URL, resulting in the exposure of sensitive information about clients. This information can include potentially confidential data, such as user credentials or session identifiers. The vulnerability has a CVSS score of 6.5, indicating a moderate severity level.
How To Fix
Minimum fixed version
5.7-r0
This is the first release that contains the fix.
sudo apk add --upgrade squidTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, users can consider restricting access to the internal cache manager URL. This can be achieved by configuring appropriate access control rules or firewall settings to limit access to trusted IP addresses or networks. By restricting access, the risk of sensitive information exposure can be mitigated until the upgrade to Squid 5.7 or later is performed.
Conclusion
In conclusion, the vulnerability in Squid versions 4.9 through 4.17 and 5.0.6 through 5.6 can lead to the exposure of sensitive information about clients using the proxy. To mitigate this risk, it is crucial to upgrade to Squid 5.7 or later. Restricting access to the internal cache manager URL can serve as a temporary workaround. For further assistance and support in addressing this vulnerability, please contact DevNack.com.
See every vulnerability recorded for squid →
FAQ
Squid is an open-source proxy caching server that improves web performance and reduces bandwidth usage by caching frequently accessed content.
The vulnerability allows an attacker to obtain sensitive information about clients using the Squid proxy, potentially compromising user credentials or session identifiers.
Versions 4.9 through 4.17 and 5.0.6 through 5.6 of Squid are affected by this vulnerability.
To fix this vulnerability, it is recommended to upgrade to Squid version 5.7 or later.
Yes, as a temporary workaround, access to the internal cache manager URL can be restricted to trusted IP addresses or networks.
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