Bug 596454 (CVE-2010-1749)

Summary: CVE-2010-1749 WebKit: use-after-free vulnerability in handling of CSS run-ins
Product: [Other] Security Response Reporter: Vincent Danen <vdanen>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED WONTFIX QA Contact:
Severity: urgent Docs Contact:
Priority: urgent    
Version: unspecifiedCC: bressers, jgrulich, jlieskov, jreznik, security-response-team, stransky, than
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2015-08-05 08:16:36 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On:    
Bug Blocks: 806808    

Description Vincent Danen 2010-05-26 19:03:51 UTC 
A use after free issue exists in WebKit's handling of CSS run-ins. Visiting a maliciously crafted website may lead to an unexpected application termination or arbitrary code execution. This issue is addressed through improved handling of CSS run-ins.

References:

Bugzilla: https://bugs.webkit.org/show_bug.cgi?id=27193, https://bugs.webkit.org/show_bug.cgi?id=38625
Trac: http://trac.webkit.org/changeset/45941

Acknowledgements:

Red Hat would like to thank Drew Yao of Apple Product Security for responsibly reporting this issue. Upstream acknowledges wushi of team509, working with TippingPoint's Zero Day Initiative, as the original reporter.
Comment 1 Tomas Hoger 2010-05-27 20:56:04 UTC 
The above upstream commit is included in current webkitgtk (F12+) and qt packages.
Comment 11 Josh Bressers 2010-06-05 01:34:50 UTC 
This particular flaw doesn't affect khtml.

The SVG testcase is very simplistic and straightforward. It's clear this variant does not affect khtml.

As a percautionary measure, it may make sense to modify khtml to check for anonymous blocks, but not because of this flaw.

The issue at hand is that during the destruction of the object, the anonymous blocks are mishandled. This is due to the render engine though, not to anonymous block itself. It is well known that the khtml and webkit render engines are drastically different. The fact that this issue doesn't affect khtml is not a surprise.
Comment 12 Jan Lieskovsky 2010-06-08 16:49:17 UTC 
Public via:
  [1] http://support.apple.com/kb/HT419