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: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED WONTFIX QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: 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:
Embargoed:
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. ***