Bug 1625528 (CVE-2018-12379)

Summary: CVE-2018-12379 Mozilla: Out-of-bounds write with malicious MAR file
Product: [Other] Security Response Reporter: Doran Moppert <dmoppert>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: cschalle, gecko-bugs-nobody, jhorak, security-response-team, stransky
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Last Closed: 2018-11-05 11:49:45 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: 1623016, 1623017, 1623037, 1623039, 1623040, 1625533, 1625535, 1636821    
Bug Blocks: 1623023, 1636820    

Description Doran Moppert 2018-09-05 07:14:53 UTC 
When the Mozilla Updater opens a MAR format file which contains a very long item filename, an out-of-bounds write can be triggered, leading to a potentially exploitable crash. This requires running the Mozilla Updater manually on the local system with the malicious MAR file in order to occur. 



External Reference:

https://www.mozilla.org/en-US/security/advisories/mfsa2018-21/#CVE-2018-12379
Comment 1 Doran Moppert 2018-09-05 07:14:57 UTC 
Acknowledgments:

Name: the Mozilla project
Upstream: Holger Fuhrmannek
Comment 4 errata-xmlrpc 2018-09-12 10:56:04 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:2692 https://access.redhat.com/errata/RHSA-2018:2692
Comment 5 errata-xmlrpc 2018-09-12 10:57:46 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2018:2693 https://access.redhat.com/errata/RHSA-2018:2693
Comment 7 Doran Moppert 2018-10-09 01:58:58 UTC 
Statement:

This flaw cannot be exploited through email in Thunderbird as scripting is disabled in this for email content. It may be possible to exploit through Feeds (Atom or RSS) or other browser-like contexts.
Comment 8 errata-xmlrpc 2018-10-30 16:58:26 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2018:3403 https://access.redhat.com/errata/RHSA-2018:3403
Comment 9 errata-xmlrpc 2018-11-05 10:44:11 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:3458 https://access.redhat.com/errata/RHSA-2018:3458