Bug 1276332 (CVE-2015-8789)

Summary:	CVE-2015-8789 libebml: Use-after-free vulnerability in EblMaster::Read()
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	anemec, 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 21:12:35 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:	1276336, 1276337
Bug Blocks:

Description Adam Mariš 2015-10-29 13:32:20 UTC

When the parser encountered a deeply nested element with an infinite size then a following element of an upper level was not propagated correctly. Instead the element with the infinite size was added into the EBML element tree a second time resulting in memory access after freeing it and multiple attempts to free the same memory address during destruction.

Upstream patch:

https://github.com/Matroska-Org/libebml/commit/88409e2a94dd3b40ff81d08bf6d92f486d036b24

Comment 1 Adam Mariš 2015-10-29 13:38:21 UTC

Created libebml tracking bugs for this issue:

Affects: fedora-all [bug 1276336]
Affects: epel-all [bug 1276337]

Comment 2 Andrej Nemec 2016-02-01 08:35:49 UTC

Added CVE according to http://www.cvedetails.com/cve/CVE-2015-8789/

Comment 3 Dominik 'Rathann' Mierzejewski 2017-01-13 10:13:56 UTC

*** Bug 1412632 has been marked as a duplicate of this bug. ***