Bug 1218118 (CVE-2015-3455) - CVE-2015-3455 squid: incorrect X509 server certificate validation (SQUID-2015:1)
Summary: CVE-2015-3455 squid: incorrect X509 server certificate validation (SQUID-2015:1)
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2015-3455
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: 1218119 1233265
Blocks: 1210268 1218121
TreeView+ depends on / blocked
 
Reported: 2015-05-04 08:47 UTC by Martin Prpič
Modified: 2021-02-17 05:20 UTC (History)
6 users (show)

Fixed In Version: squid 3.5.4, squid 3.4.13, squid 3.3.14, squid 3.2.14
Doc Type: Bug Fix
Doc Text:
It was found that Squid configured with client-first SSL-bump did not correctly validate X.509 server certificate host name fields. A man-in-the-middle attacker could use this flaw to spoof a Squid server using a specially crafted X.509 certificate.
Clone Of:
Environment:
Last Closed: 2015-11-20 04:58:35 UTC
Embargoed:


Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2015:2378 0 normal SHIPPED_LIVE Moderate: squid security and bug fix update 2015-11-19 10:51:27 UTC

Description Martin Prpič 2015-05-04 08:47:25 UTC
It was found that when Squid was configured with client-first SSL-bump it did not correctly validate X509 server certificate domain / host name fields. A man-in-the-middle attacker could use this flaw to spoof a Squid server using a specially crafted X.509 certificate.

This flaw is only exploitable Squid is configured to perform SSL Bumping with the "client-first" or "bump" mode of operation. Sites that do not use SSL-Bump are not vulnerable.

This flaw is fixed in Squid versions 3.5.4, 3.4.13, 3.3.14, and 3.2.14. All Squid-2.x, 3.0 and 3.1 are not vulnerable to this flaw.

External References:

http://www.squid-cache.org/Advisories/SQUID-2015_1.txt

Comment 1 Martin Prpič 2015-05-04 08:48:31 UTC
Statement:

This issue did not affect the versions of squid as shipped with Red Hat Enterprise Linux 5 and 6.

Comment 2 Martin Prpič 2015-05-04 08:48:56 UTC
Created squid tracking bugs for this issue:

Affects: fedora-all [bug 1218119]

Comment 4 errata-xmlrpc 2015-11-19 12:20:36 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2015:2378 https://rhn.redhat.com/errata/RHSA-2015-2378.html

Comment 5 Fedora Update System 2016-05-06 19:54:34 UTC
libecap-1.0.0-1.fc22, squid-3.5.10-1.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.


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