Bug 1625528 – CVE-2018-12379 Mozilla: Out-of-bounds write with malicious MAR file

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Bug 1625528 - (CVE-2018-12379) CVE-2018-12379 Mozilla: Out-of-bounds write with malicious MAR file

Summary:	CVE-2018-12379 Mozilla: Out-of-bounds write with malicious MAR file

Status:	NEW

Aliases:	CVE-2018-12379

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=moderate,public=20180905,repor...
Keywords:	Security

Depends On:	1623039 1623040 1623016 1623017 1623037 1625533 1625535 1636821
Blocks:	1636820 1623023
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Reported:	2018-09-05 03:14 EDT by Doran Moppert
Modified:	2018-10-30 12:58 EDT (History)
CC List:	5 users (show)

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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2018:2692	None	None	None	2018-09-12 06:56 EDT
Red Hat Product Errata	RHSA-2018:2693	None	None	None	2018-09-12 06:57 EDT
Red Hat Product Errata	RHSA-2018:3403	None	None	None	2018-10-30 12:58 EDT

Groups: None (edit)

Description Doran Moppert 2018-09-05 03:14:53 EDT

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 03:14:57 EDT

Acknowledgments:

Name: the Mozilla project
Upstream: Holger Fuhrmannek

Comment 4 errata-xmlrpc 2018-09-12 06:56:04 EDT

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 06:57:46 EDT

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 2018-10-08 21:58:58 EDT

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 12:58:26 EDT

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

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