Bug 1211260 – CVE-2016-4354 CVE-2016-4355 libksba: integer overflow in the BER decoder src/ber-decoder.c (ber_decoder_s)

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Bug 1211260 - (CVE-2016-4354, CVE-2016-4355) CVE-2016-4354 CVE-2016-4355 libksba: integer overflow in the BER decoder src/ber-decoder.c (ber_decoder_s)

Summary:	CVE-2016-4354 CVE-2016-4355 libksba: integer overflow in the BER decoder src/...

Status:	NEW

Aliases:	CVE-2016-4354, CVE-2016-4355

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

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=moderate,public=20150408,repor...
Keywords:	Security

Depends On:	1211263
Blocks:	1211262
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Reported:	2015-04-13 09:06 EDT by Vasyl Kaigorodov
Modified:	2016-05-02 04:22 EDT (History)
CC List:	3 users (show)

See Also:
Fixed In Version:	libksba 1.3.3
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:
Type:	---
Regression:	---
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CRM:
Verified Versions:
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oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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Description Vasyl Kaigorodov 2015-04-13 09:06:14 EDT

Version 1.3.3 of libksba fxes an integer overflow in the BER decoder:

http://git.gnupg.org/cgi-bin/gitweb.cgi?p=libksba.git;a=commit;h=aea7b6032865740478ca4b706850a5217f1c3887

Comment 1 Vasyl Kaigorodov 2015-04-13 09:10:27 EDT

Created libksba tracking bugs for this issue:

Affects: fedora-all [bug 1211263]

Comment 2 Huzaifa S. Sidhpurwala 2015-05-03 23:27:18 EDT

Statement:

Red Hat Product Security has rated this issue as having moderate security impact, a future update may address this flaw in libksba.

Comment 3 Andrej Nemec 2016-05-02 04:22:51 EDT

CVE assignments:

http://seclists.org/oss-sec/2016/q2/172

Descriptions:

Use CVE-2016-4354 for the use of an incorrect integer data type.

Use CVE-2016-4355 for the cases in which the code was simply making no
attempt to check for an integer overflow (the "+ 100" cases and the
"+= d->val.length" case).

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