Bug 1217825 (CVE-2023-49288)

Summary:	VUL-0: CVE-2023-49288: squid: Use-After-Free in the HTTP Collapsed Forwarding Feature
Product:	[Novell Products] SUSE Security Incidents	Reporter:	SMASH SMASH <smash_bz>
Component:	Incidents	Assignee:	Adam Majer <amajer>
Status:	IN_PROGRESS ---	QA Contact:	Security Team bot <security-team>
Severity:	Major
Priority:	P3 - Medium	CC:	amajer, andrea.mattiazzo, meissner, stoyan.manolov, thomas.leroy
Version:	unspecified
Target Milestone:	---
Hardware:	Other
OS:	Other
URL:	https://smash.suse.de/issue/387016/
Whiteboard:	CVSSv3.1:SUSE:CVE-2023-49288:7.5:(AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Found By:	Security Response Team	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---

Description SMASH SMASH 2023-12-05 15:37:06 UTC

Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Affected versions of squid are subject to a a Use-After-Free bug which can lead to a Denial of Service attack via collapsed forwarding. All versions of Squid from 3.5 up to and including 5.9 configured with "collapsed_forwarding on" are vulnerable. Configurations with "collapsed_forwarding off" or without a "collapsed_forwarding" directive are not vulnerable. This bug is fixed by Squid version 6.0.1. Users are advised to upgrade. Users unable to upgrade should remove all collapsed_forwarding lines from their squid.conf.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-49288
https://github.com/squid-cache/squid/security/advisories/GHSA-rj5h-46j6-q2g5

Comment 4 Andrea Mattiazzo 2023-12-13 09:29:14 UTC

Could you please double check my assumption? With the information in the advisory, I wasn't able to find the specific flow and which pointers are affected by this use-after-free bug.

Comment 5 Gabriele Sonnu 2023-12-13 10:49:21 UTC

*** Bug 1217778 has been marked as a duplicate of this bug. ***