Bug 1852554 (CVE-2020-14058) - CVE-2020-14058 squid: DoS in TLS handshake
Summary: CVE-2020-14058 squid: DoS in TLS handshake
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2020-14058
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1852555 1853135 1853136
Blocks: 1852556
TreeView+ depends on / blocked
 
Reported: 2020-06-30 17:04 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-03-30 13:54 UTC (History)
5 users (show)

Fixed In Version: squid 4.12, squid 5.0.3
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in squid. A denial-of-service attack while processing TLS certificates is possible due to use of a potentially dangerous function in Squid and the default certificate validation helper. The highest threat from this vulnerability is to system availability.
Clone Of:
Environment:
Last Closed: 2020-11-04 02:26:15 UTC

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2020:4743 0 None None None 2020-11-04 03:32:09 UTC

Description Guilherme de Almeida Suckevicz 2020-06-30 17:04:45 UTC 
Due to use of a potentially dangerous function Squid and the default certificate validation helper are vulnerable to a Denial of Service attack when processing TLS certificates.

Reference:
https://github.com/squid-cache/squid/security/advisories/GHSA-qvf6-485q-vm57
Comment 1 Guilherme de Almeida Suckevicz 2020-06-30 17:05:00 UTC 
Created squid tracking bugs for this issue:

Affects: fedora-all [bug 1852555]
Comment 2 Huzaifa S. Sidhpurwala 2020-07-02 04:26:15 UTC 
Upstream patches:

Squid 4:
http://www.squid-cache.org/Versions/v4/changesets/squid-4-93f5fda134a2a010b84ffedbe833d670e63ba4be.patch

Squid 5:
http://www.squid-cache.org/Versions/v5/changesets/squid-5-c6d1a4f6a2cbebceebc8a3fcd8f539ceb7b7f723.patch
Comment 3 Huzaifa S. Sidhpurwala 2020-07-02 04:26:18 UTC 
External References:

https://github.com/squid-cache/squid/security/advisories/GHSA-qvf6-485q-vm57
Comment 8 Product Security DevOps Team 2020-11-04 02:26:15 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-14058
Comment 9 errata-xmlrpc 2020-11-04 03:32:08 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:4743 https://access.redhat.com/errata/RHSA-2020:4743
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