Bug 828360 (CVE-2012-2388)

Summary: CVE-2012-2388 strongswan: authentication bypass due to RSA signature verification flaw
Product: [Other] Security Response Reporter: Vincent Danen <vdanen>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: psimerda
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Clone Of: Environment:
Last Closed: 2012-07-10 01:11:33 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On: 828361, 828362    
Bug Blocks:    

Description Vincent Danen 2012-06-04 17:12:24 UTC 
strongSwan 4.6.4 was released [1] to fix a security flaw in 4.2.0 through to 4.6.3.  If the gmp plugin were used for RSA signature verification with IKEv1 or IKEv2, an empty or zeroed signature was handled as a legitimate one.  A connection definition using RSA authentication is required to exploit this flaw, and an attacker presenting a forged signature and/or certificate could authenticate as any legitimate user.

The fix is present in version 4.6.4 or as a patch [2].

[1] http://www.strongswan.org/blog/2012/05/31/strongswan-4.6.4-released-(cve-2012-2388).html
[2] http://download.strongswan.org/patches/09_gmp_rsa_signature_patch/strongswan-4.2.0-4.6.3_gmp_rsa_signature.patch
Comment 1 Vincent Danen 2012-06-04 17:15:00 UTC 
Created strongswan tracking bugs for this issue

Affects: fedora-all [bug 828361]
Affects: epel-6 [bug 828362]