Bug 1265610 (CVE-2015-4505)

Summary: CVE-2015-4505 Mozilla: Arbitrary file manipulation by local user through Mozilla updater (MFSA 2015-100)
Product: [Other] Security Response Reporter: Prasad Pandit <ppandit>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: cschalle, gecko-bugs-nobody, jhorak, stransky
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: 2015-09-23 20:20:29 UTC Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 1261782    

Description Prasad Pandit 2015-09-23 11:00:13 UTC 
Security researcher Holger Fuhrmannek reported that when the Mozilla updater
is run, the updater can be manipulated to load the updated files from a working
directory under user control in concert with junctions. When the updates are
run by the Mozilla Maintenance Service on Windows, these malicious files can
be run with elevated privileges and be used to replace arbitrary files on the
system. This could allow for arbitrary code execution by a malicious user with
local system access but does not allow for exploitation by web content.

This issue is specific to Windows and does not affect Linux or OS X systems.

Upstream bug:

https://bugzilla.mozilla.org/show_bug.cgi?id=1177861

External References:

https://www.mozilla.org/en-US/security/advisories/mfsa2015-100/
Comment 1 Martin Prpič 2015-09-24 12:42:02 UTC 
Acknowledgements:

Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Holger Fuhrmannek as the original reporter.