Bug 1798545 (CVE-2020-8517) - CVE-2020-8517 squid: Buffer Overflow in ext_lm_group_acl helper
Summary: CVE-2020-8517 squid: Buffer Overflow in ext_lm_group_acl helper
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2020-8517
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1798546
Blocks: 1798558
TreeView+ depends on / blocked
 
Reported: 2020-02-05 15:02 UTC by Pedro Sampaio
Modified: 2023-10-06 19:08 UTC (History)
6 users (show)

Fixed In Version: squid 4.10
Doc Type: No Doc Update
Doc Text:
Clone Of:
Environment:
Last Closed: 2020-02-13 10:30:35 UTC
Embargoed:

Attachments (Terms of Use)

Description Pedro Sampaio 2020-02-05 15:02:30 UTC 
An issue was discovered in Squid before 4.10. Due to incorrect input validation, the NTLM authentication credentials parser in ext_lm_group_acl may write to memory outside the credentials buffer. On systems with memory access protections, this can result in the helper process being terminated unexpectedly. This leads to the Squid process also terminating and a denial of service for all clients using the proxy.

References:

http://www.squid-cache.org/Advisories/SQUID-2020_3.txt 	
http://www.squid-cache.org/Versions/v4/changesets/squid-4-6982f1187a26557e582172965e266f544ea562a5.patch
Comment 1 Pedro Sampaio 2020-02-05 15:03:05 UTC 
Created squid tracking bugs for this issue:

Affects: fedora-all [bug 1798546]
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