Bug 1300330 – CVE-2016-2050 libdwarf: Out-of-bounds write in get_abbrev_array_info

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Bug 1300330 - (CVE-2016-2050) CVE-2016-2050 libdwarf: Out-of-bounds write in get_abbrev_array_info

Summary:	CVE-2016-2050 libdwarf: Out-of-bounds write in get_abbrev_array_info

Status:	CLOSED NOTABUG

Aliases:	CVE-2016-2050

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=20160119,reported=2...
Keywords:	Security

Depends On:	1300333 1300332
Blocks:	1299970
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Reported:	2016-01-20 08:40 EST by Adam Mariš
Modified:	2016-10-27 04:44 EDT (History)
CC List:	5 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2016-04-01 11:52:15 EDT
Type:	---
Regression:	---
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Documentation:	---
CRM:
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oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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Description Adam Mariš 2016-01-20 08:40:39 EST

An out-of-bounds write vulnerability was found in libdwarf-20151114 in get_abbrev_array_info function.

CVE request (contains reproducer and valgrind report):

http://seclists.org/oss-sec/2016/q1/141

Comment 1 Adam Mariš 2016-01-20 08:41:22 EST

Created libdwarf tracking bugs for this issue:

Affects: fedora-all [bug 1300332]
Affects: epel-all [bug 1300333]

Comment 3 Cedric Buissart 2016-04-01 11:48:55 EDT

This bug appears to have been introduced by the following upstream commit from  Wed Dec 31 16:45:14 2014 -0800 :
https://github.com/tomhughes/libdwarf/commit/3ff5a4a024924

and is resolved by the following commit :
https://github.com/tomhughes/libdwarf/commit/a05f5e2ae6a5f

Red Hat Enterprise Linux v.7 is shipped with an earlier version and is not impacted.

Comment 4 Cedric Buissart 2016-04-01 11:49:35 EDT

Statement:

This issue did not affect the versions of libdwarf as shipped
with Red Hat Enterprise Linux 7.

Comment 5 Cedric Buissart 2016-04-01 11:51:38 EDT

External BTS bug for CVE-2016-2050: 
 Bug 963791 - (CVE-2016-2050) VUL-1: CVE-2016-2050: libdwarf: Out-of-bounds write in get_abbrev_array_info 
https://bugzilla.novell.com/show_bug.cgi?id=963791

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