Bug 1350280 – CVE-2016-5844 libarchive: undefined behaviour (integer overflow) in iso parser

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Bug 1350280 - (CVE-2016-5844) CVE-2016-5844 libarchive: undefined behaviour (integer overflow) in iso parser

Summary:	CVE-2016-5844 libarchive: undefined behaviour (integer overflow) in iso parser

Status:	NEW

Aliases:	CVE-2016-5844

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

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

URL:
Whiteboard:	impact=low,public=20160624,reported=2...
Keywords:	Security

Depends On:	1352775 1352776 1353065 1353066 1353067 1353068
Blocks:	1334215
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Reported:	2016-06-26 19:48 EDT by Doran Moppert
Modified:	2016-09-12 16:15 EDT (History)
CC List:	4 users (show)

See Also:
Fixed In Version:	libarchive 3.2.1
Doc Type:	If docs needed, set a value
Doc Text:	Undefined behavior (signed integer overflow) was discovered in libarchive, in the ISO parser. A crafted file could potentially cause denial of service.
Story Points:	---
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Last Closed:
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Regression:	---
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CRM:
Verified Versions:
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oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2016:1844	normal	SHIPPED_LIVE	Important: libarchive security update	2016-09-12 20:11:35 EDT
Red Hat Product Errata	RHSA-2016:1850	normal	SHIPPED_LIVE	Important: libarchive security update	2016-09-12 19:54:24 EDT

Groups: None (edit)

Description Doran Moppert 2016-06-26 19:48:35 EDT

Hanno Böck has disclosed another Undefined Behaviour (signed integer 
overflow) on oss-security:

    http://seclists.org/oss-sec/2016/q2/591

Upstream ticket:

    https://github.com/libarchive/libarchive/issues/717

Upstream fix (released in libarchive-3.2.1):

    https://github.com/libarchive/libarchive/commit/3ad08e0

While the UB exists in 3.2.0, an earlier patch seems to mitigate against 
the issue:

    https://github.com/libarchive/libarchive/commit/e6c9668f

This function is called immediately after the overflow, and will 
immediately reject a negative skipsize with ARCHIVE_FATAL, skipping all 
further processing.

Previous releases up to and including 3.1.2 (including 2.8.3, 2.8.4) do 
not include the mitigation and are thus likely vulnerable.

Comment 1 Doran Moppert 2016-07-05 00:38:39 EDT

Created libarchive tracking bugs for this issue:

Affects: fedora-all [bug 1352776]
Affects: epel-5 [bug 1352775]

Comment 3 errata-xmlrpc 2016-09-12 15:56:51 EDT

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2016:1850 https://rhn.redhat.com/errata/RHSA-2016-1850.html

Comment 4 errata-xmlrpc 2016-09-12 16:15:09 EDT

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:1844 https://rhn.redhat.com/errata/RHSA-2016-1844.html

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