Bug 1047299 (CVE-2013-7239)

Summary: CVE-2013-7239 memcached: SASL authentication allows wrong credentials to access memcache
Product: [Other] Security Response Reporter: Ratul Gupta <ratulg>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: bdunne, dajohnso, jfrey, jkurik, jorton, kseifried, lindner, matthias, mlichvar, obarenbo, pfrields, xlecauch
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: memcached 1.4.17 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2014-01-02 10:53:41 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1047300, 1047302, 1047303    
Bug Blocks: 1047305    

Description Ratul Gupta 2013-12-30 10:31:27 UTC 
Memcached was found to be affected by a SASL authentication bypass glitch.

The issue was that if the attacker makes an invalid request with SASL credentials, it will initially fail. However if he issue a second request with bad SASL credentials, it will authenticate. This way, an attacker can get access to memcache even with wrong SASL credentials.

References:
http://seclists.org/oss-sec/2013/q4/565
https://code.google.com/p/memcached/issues/detail?id=316
https://code.google.com/p/memcached/wiki/ReleaseNotes1417

Commit:
https://github.com/memcached/memcached/commit/87c1cf0f20be20608d3becf854e9cf0910f4ad32
Comment 2 Ratul Gupta 2013-12-30 10:33:19 UTC 
Created memcached tracking bugs for this issue:

Affects: fedora-all [bug 1047300]
Affects: epel-5 [bug 1047302]
Comment 3 Huzaifa S. Sidhpurwala 2014-01-02 05:16:45 UTC 
Statement:

Not Vulnerable. This issue does not affect the version of memcached package as shipped with Red Hat Enterprise Linux 5 and 6, since its not compiled with SASL support.
Comment 4 Miroslav Lichvar 2014-01-02 09:58:09 UTC 
Please note that none of the EPEL, RHEL or Fedora memcached packages are affected by this bug as they are not compiled with SASL support.