Bug 1377925 (CVE-2016-8689)

Summary:	CVE-2016-8689 libarchive: heap based buffer overflow in read_header (archive_read_support_format_7zip.c)
Product:	[Other] Security Response	Reporter:	Doran Moppert <dmoppert>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	anto.trande, besser82, ndevos, praiskup, slawomir, trepik
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	libarchive 3.2.2	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-09-23 03:21:06 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Bug Depends On:	1378668, 1385674, 1385675, 1385676
Bug Blocks:	1376684, 1385672

Description Doran Moppert 2016-09-21 03:31:54 UTC

A crafted 7zip archive with multiple headers of the same kind could cause 
calculated values from one being used to interpret the other, leading to
out-of-bounds reads of adjacent structures on the heap.

Disclosed on oss-security:

http://seclists.org/oss-sec/2016/q3/516

Upstream issue:

https://github.com/libarchive/libarchive/issues/761

Upstream fix:

https://github.com/libarchive/libarchive/commit/7f17c79

Comment 1 Doran Moppert 2016-09-22 03:57:55 UTC

Code execution is not possible with this flaw, and the information disclosure is limited in both size and scope.

Comment 2 Doran Moppert 2016-09-23 03:16:20 UTC

Created libarchive tracking bugs for this issue:

Affects: fedora-all [bug 1378668]

Comment 3 Doran Moppert 2016-09-23 03:19:05 UTC

Statement:

Red Hat Product Security has rated this issue as having Low security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.

Comment 4 Doran Moppert 2016-10-18 04:31:05 UTC

*** Bug 1385670 has been marked as a duplicate of this bug. ***