Bug 1209943 (CVE-2013-7439)

Summary: CVE-2013-7439 libX11: buffer overflow in MakeBigReq macro
Product: [Other] Security Response Reporter: Vasyl Kaigorodov <vkaigoro>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: ajax, huzaifas, jrusnack, magoldma, opensource, sandmann
Target Milestone: ---Keywords: Reopened, Security
Target Release: ---   
Hardware: All   
OS: Linux   
Fixed In Version: libX11 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2015-08-22 06:34:44 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On:    
Bug Blocks: 1209944    

Description Vasyl Kaigorodov 2015-04-08 13:36:54 UTC
The MakeBigReq macro in libX11 before version contained a 4-byte buffer overflow:


Fixed by the following commit in libX11


CVE request: http://seclists.org/oss-sec/2015/q2/73

Comment 1 Huzaifa S. Sidhpurwala 2015-04-09 06:27:55 UTC

This issue does not affect the version of libX11 package as shipped with Red Hat Enterprise Linux 7.

This issue was was fixed in Red Hat Enterprise Linux 6 via the following security advisory:


This issue affects the version of libX11 package as shipped with Red Hat Enterprise Linux 5. Red Hat Enterprise Linux 5 is now in Extended Life Cycle phase of the support and maintenance life cycle. This issue is not currently planned to be addressed in future updates.

Comment 2 Huzaifa S. Sidhpurwala 2015-04-09 07:13:54 UTC
This issue was assigned CVE-2013-7439 via 


Comment 3 Till Maas 2015-04-15 16:28:16 UTC
According to http://lists.x.org/archives/xorg-announce/2015-April/002561.html a rebuild of all software using the vulnerable version of the macros is required. Is this tracked somewhere or did this already happen? Did this happen for EPEL?