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Bug 1348439 - (CVE-2016-4300) CVE-2016-4300 libarchive: Heap buffer overflow vulnerability in the 7zip read_SubStreamsInfo
CVE-2016-4300 libarchive: Heap buffer overflow vulnerability in the 7zip read...
Status: CLOSED ERRATA
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20160619,repor...
: Security
Depends On: 1352776 1353065 1353066
Blocks: 1334215
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Reported: 2016-06-21 03:50 EDT by Andrej Nemec
Modified: 2016-10-18 00:58 EDT (History)
5 users (show)

See Also:
Fixed In Version: libarchive 3.2.1
Doc Type: Bug Fix
Doc Text:
A vulnerability was found in libarchive's handling of 7zip data. A specially crafted 7zip file can cause a integer overflow resulting in memory corruption that can lead to code execution.
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Environment:
Last Closed: 2016-10-18 00:58:55 EDT
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CRM:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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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

  None (edit)
Description Andrej Nemec 2016-06-21 03:50:09 EDT 
An exploitable heap overflow vulnerability exists in the 7zip read_SubStreamsInfo functionality of libarchive. A specially crafted 7zip file can cause a integer overflow resulting in memory corruption that can lead to code execution. An attacker can send a malformed file to trigger this vulnerability.

External references:

http://www.talosintel.com/reports/TALOS-2016-0152/

Upstream fix:

https://github.com/libarchive/libarchive/commit/e79ef306afe332faf22e9b442a2c6b59cb175573
Comment 1 Doran Moppert 2016-06-22 02:31:02 EDT 
libarchive-2.8 does not include the affected functionality.

libarchive-3.1 has a smaller limit for UMAX_ENTRY (1m vs 100m), making
exploitation more difficult but not impossible.
Comment 2 Doran Moppert 2016-07-05 00:37:46 EDT 
Created libarchive tracking bugs for this issue:

Affects: fedora-all [bug 1352776]
Comment 5 errata-xmlrpc 2016-09-12 16:14:17 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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