Bug 1340099 (CVE-2016-5034)

Summary:	CVE-2016-5034 libdwarf: Out-of-bounds write in dwarf_elf_access.c
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	fche, orion
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 02:52:56 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:	1340128, 1340129
Bug Blocks:

Description Andrej Nemec 2016-05-26 12:47:58 UTC

An out-of-bounds write was found in libdwarf. Test object shows an invalid write in dwarf_elf_access.c (when doing the relocations). Adding the relocation value to anything overflowed and disguised the bad relocation record. With a 32bit kernel build the test could show a double-free and coredump due to the unchecked invalid writes from relocations.

References:

http://seclists.org/oss-sec/2016/q2/393

External references:

https://www.prevanders.net/dwarfbug.html

Upstream fix:

https://sourceforge.net/p/libdwarf/code/ci/10ca310f64368dc083efacac87732c02ef560a92

Comment 1 Andrej Nemec 2016-05-26 13:42:27 UTC

Created libdwarf tracking bugs for this issue:

Affects: fedora-all [bug 1340128]
Affects: epel-6 [bug 1340129]