CVE-2023-49288

Summary

CVE-2023-49288 is a Denial of Service vulnerability affecting Squid, a popular caching proxy for the Web. The issue is a Use-After-Free bug in collapsed forwarding, a feature enabled by default in squid.conf. Versions 3.5 to 5.9 of Squid are vulnerable, while configurations without the "collapsed_forwarding" directive or those with it turned off are not. The bug can result in a collapsed forwarding condition, causing a server overload and potential downtime. Squid version 6.0.1 contains the necessary fix, and affected users are advised to upgrade or remove all collapsed_forwarding lines from their squid.conf files.

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