Bug 1303853 (CVE-2015-8791)

Summary:	CVE-2015-8791 libebml: function EbmlElement::ReadCodedSizeValue leaks information
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	dmitry, dominik, hdegoede, itamar, kwizart, martin.sourada
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	libebml 1.3.3	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-03-28 21:13:43 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:	1303854, 1303856
Bug Blocks:

Description Andrej Nemec 2016-02-02 09:16:38 UTC

The EbmlElement::ReadCodedSizeValue function in libEBML before 1.3.3 allows context-dependent attackers to obtain sensitive information from process heap memory via a crafted length value in an EBML id, which triggers an invalid memory access.

External references:

http://www.scip.ch/en/?vuldb.80729
https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-8791

Upstream fix:

https://github.com/Matroska-Org/libebml/commit/24e5cd7c666b1ddd85619d60486db0a5481c1b90

Comment 1 Andrej Nemec 2016-02-02 09:17:24 UTC

Created libebml tracking bugs for this issue:

Affects: epel-6 [bug 1303854]
Affects: epel-7 [bug 1303856]