Bug 1262849

Summary: libxml2: Out-of-bounds memory access when parsing unclosed HTML comment
Product: [Other] Security Response Reporter: Adam Mariš <amaris>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED DUPLICATE QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: adamkrisusa, athmanem, carnil, c.david86, drizt72, erik-fedora, fedora-mingw, lfarkas, mnewsome, mprpic, ohudlick, rjones, slawomir, veillard, yselkowi
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2015-11-13 16:19:53 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: 1262851, 1262853, 1262854    
Bug Blocks: 1262850, 1276694    

Description Adam Mariš 2015-09-14 13:31:07 UTC 
Out-of-bounds memory access vulnerability when parsing unclosed HTMl comment was found in libxml2. By entering a unclosed html comment such as <!-- the libxml2 parser didn't stop parsing at the end of the buffer, causing random memory to be included in the parsed comment.

CVE request:

http://seclists.org/oss-sec/2015/q3/540

Upstream was notified, but patch is not released yet. However, a patch for nokogiri, which uses embedded libxml2, was proposed:

https://github.com/Shopify/nokogiri/compare/1b1fcad8bd64ab70256666c38d2c998e86ade8c0...master
Comment 1 Adam Mariš 2015-09-14 13:33:10 UTC 
Created libxml2 tracking bugs for this issue:

Affects: fedora-all [bug 1262851]
Comment 2 Adam Mariš 2015-09-14 13:33:12 UTC 
Created mingw-libxml2 tracking bugs for this issue:

Affects: fedora-all [bug 1262853]
Affects: epel-7 [bug 1262854]
Comment 3 Martin Prpič 2015-11-03 10:30:21 UTC 
*** Bug 1276688 has been marked as a duplicate of this bug. ***
Comment 4 Adam Mariš 2015-11-13 15:21:06 UTC 
Upstream patch:

https://git.gnome.org/browse/libxml2/commit/?id=e724879d964d774df9b7969fc846605aa1bac54c
Comment 5 Adam Mariš 2015-11-13 16:19:53 UTC 

*** This bug has been marked as a duplicate of bug 1213957 ***
Comment 6 adamusa 2023-06-27 07:28:24 UTC Comment hidden (spam)