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Bug 1377925 - (CVE-2016-8689) CVE-2016-8689 libarchive: heap based buffer overflow in read_header (archive_read_support_format_7zip.c)
CVE-2016-8689 libarchive: heap based buffer overflow in read_header (archive_...
Status: CLOSED WONTFIX
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20160915,reported=2...
: Security
: 1385670 (view as bug list)
Depends On: 1385676 1378668 1385674 1385675
Blocks: 1376684 1385672
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Reported: 2016-09-20 23:31 EDT by Doran Moppert
Modified: 2016-11-08 10:51 EST (History)
6 users (show)

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Last Closed: 2016-09-22 23:21:06 EDT
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Description Doran Moppert 2016-09-20 23:31:54 EDT 
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 2016-09-21 23:57:55 EDT 
Code execution is not possible with this flaw, and the information disclosure is limited in both size and scope.
Comment 2 Doran Moppert 2016-09-22 23:16:20 EDT 
Created libarchive tracking bugs for this issue:

Affects: fedora-all [bug 1378668]
Comment 3 Doran Moppert 2016-09-22 23:19:05 EDT 
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 00:31:05 EDT 
*** Bug 1385670 has been marked as a duplicate of this bug. ***
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