Bug 1335396 (CVE-2016-4579)

Summary:	CVE-2016-4579 libksba: Out-of-bounds read in _ksba_ber_parse_tl
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	rdieter, tmraz
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	libksba 1.3.4	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 02:51:43 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:	1334832
Bug Blocks:	1211262

Description Andrej Nemec 2016-05-12 07:39:55 UTC

A vulnerability was found in libksba. The returned length of the object from _ksba_ber_parse_tl (ti.length) was not always checked against the actual buffer length, thus leading to a read access after the end of the buffer and a crash.

Upstream fix:

http://git.gnupg.org/cgi-bin/gitweb.cgi?p=libksba.git;a=commit;h=a7eed17a0b2a1c09ef986f3b4b323cd31cea2b64

References:

http://seclists.org/oss-sec/2016/q2/304

Comment 1 Andrej Nemec 2016-05-12 07:44:58 UTC

Created libksba tracking bugs for this issue:

Affects: fedora-all [bug 1334832]

Comment 2 Fedora Update System 2016-05-14 23:25:51 UTC

libksba-1.3.4-1.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.

Comment 3 Fedora Update System 2016-05-16 22:25:51 UTC

libksba-1.3.4-1.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.