Bug 1348444 (CVE-2016-4302)

Summary:	CVE-2016-4302 libarchive: Heap buffer overflow in the Rar decompression functionality
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	dmoppert, ndevos, praiskup, sardella, slawomir
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	libarchive 3.2.1	Doc Type:	If docs needed, set a value
Doc Text:	A vulnerability was found in libarchive's handling of RAR archives. A specially crafted RAR file can cause a heap overflow, potentially leading to code execution in the context of the application.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-10-18 04:59:10 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1352776, 1353065, 1353066
Bug Blocks:	1334215

Description Andrej Nemec 2016-06-21 07:59:14 UTC

An exploitable heap overflow vulnerability exists in the Rar decompression functionality of libarchive. A specially crafted Rar file can cause a heap corruption eventually leading to code execution. An attacker can send a malformed file to trigger this vulnerability.

External references:

http://www.talosintel.com/reports/TALOS-2016-0154/

Upstream fix:

https://github.com/libarchive/libarchive/commit/05caadc7eedbef471ac9610809ba683f0c698700

Comment 1 Doran Moppert 2016-06-22 07:15:59 UTC

Libarchive-2.8 does not include the rar/ppmd functionality that introduced this
flaw.

Comment 2 Doran Moppert 2016-07-05 04:37:55 UTC

Created libarchive tracking bugs for this issue:

Affects: fedora-all [bug 1352776]

Comment 5 errata-xmlrpc 2016-09-12 20:14:24 UTC

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