Bug 1348772 – CVE-2015-8921 libarchive: Global out of bounds read in mtree parser

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Bug 1348772 - (CVE-2015-8921) CVE-2015-8921 libarchive: Global out of bounds read in mtree parser

Summary:	CVE-2015-8921 libarchive: Global out of bounds read in mtree parser

Status:	ASSIGNED

Aliases:	CVE-2015-8921

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	low Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=low,public=20160617,reported=2...
Keywords:	Security

Depends On:	1352775 1352776 1353065 1353066 1353067 1353068
Blocks:	1334215
	Show dependency tree / graph

Reported:	2016-06-21 23:31 EDT by Doran Moppert
Modified:	2016-09-12 16:14 EDT (History)
CC List:	5 users (show)

See Also:
Fixed In Version:	libarchive 3.2.0
Doc Type:	Bug Fix
Doc Text:	A vulnerability was found in libarchive. A specially crafted mtree file could cause libarchive to read beyond a statically declared structure, potentially disclosing application memory.
Story Points:	---
Clone Of:
Environment:
Last Closed:
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
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
Red Hat Product Errata	RHSA-2016:1850	normal	SHIPPED_LIVE	Important: libarchive security update	2016-09-12 19:54:24 EDT

Groups: None (edit)

Description Doran Moppert 2016-06-21 23:31:42 EDT

An out of bounds read was discovered in the mtree parser.  A specially
crafted mtree file could cause libarchive to read beyond a statically
declared structure.  The read was using memcmp(), so data could not
be directly exfiltrated by an attacker.

The vulnerable code appears to be reachable through other paths in
libarchive-2.8, though the reproducer in the upstream ticket fails
to generate a warning.

Upstream bug:
    https://github.com/libarchive/libarchive/issues/512

Upstream fix:
    https://github.com/libarchive/libarchive/commit/1cbc76f

Comment 2 Doran Moppert 2016-07-05 00:38:01 EDT

Created libarchive tracking bugs for this issue:

Affects: fedora-all [bug 1352776]
Affects: epel-5 [bug 1352775]

Comment 4 Pavel Raiskup 2016-07-08 03:23:25 EDT

(In reply to Doran Moppert from comment #0)
> Upstream fix:
>     https://github.com/libarchive/libarchive/commit/1cbc76f

For myself: that is incomplete fix, there are follow-up patches.

Comment 5 errata-xmlrpc 2016-09-12 15:56:38 EDT

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2016:1850 https://rhn.redhat.com/errata/RHSA-2016-1850.html

Comment 6 errata-xmlrpc 2016-09-12 16:14:31 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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