Bug 1335396 – CVE-2016-4579 libksba: Out-of-bounds read in _ksba_ber_parse_tl

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Bug 1335396 - (CVE-2016-4579) CVE-2016-4579 libksba: Out-of-bounds read in _ksba_ber_parse_tl

Summary:	CVE-2016-4579 libksba: Out-of-bounds read in _ksba_ber_parse_tl

Status:	NEW

Aliases:	CVE-2016-4579

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
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Assigned To:	Red Hat Product Security
QA Contact:
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URL:
Whiteboard:	impact=moderate,public=20160510,repor...
Keywords:	Security

Depends On:	1334832
Blocks:	1211262
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Reported:	2016-05-12 03:39 EDT by Andrej Nemec
Modified:	2016-05-16 18:25 EDT (History)
CC List:	2 users (show)

See Also:
Fixed In Version:	libksba 1.3.4
Doc Type:	Bug Fix
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Description Andrej Nemec 2016-05-12 03:39:55 EDT

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 03:44:58 EDT

Created libksba tracking bugs for this issue:

Affects: fedora-all [bug 1334832]

Comment 2 Fedora Update System 2016-05-14 19:25:51 EDT

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 18:25:51 EDT

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.

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