Bug 771782 – CVE-2012-0027 openssl: invalid GOST parameters DoS attack

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Bug 771782 - (CVE-2012-0027) CVE-2012-0027 openssl: invalid GOST parameters DoS attack

Summary:	CVE-2012-0027 openssl: invalid GOST parameters DoS attack

Status:	CLOSED NOTABUG

Aliases:	CVE-2012-0027

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=20120104,repor...
Keywords:	Security

Depends On:
Blocks:	771783
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Reported:	2012-01-04 17:58 EST by Vincent Danen
Modified:	2012-12-17 12:58 EST (History)
CC List:	7 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2012-01-05 04:20:15 EST
Type:	---
Regression:	---
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Documentation:	---
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RHEL 7.3 requirements from Atomic Host:
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Description Vincent Danen 2012-01-04 17:58:53 EST

Invalid GOST parameters DoS Attack (CVE-2012-0027)
===================================================

A malicious TLS client can send an invalid set of GOST parameters
which will cause the server to crash due to lack of error checking.
This could be used in a denial-of-service attack.

Only users of the OpenSSL GOST ENGINE are affected by this bug.

Thanks to Andrey Kulikov <amdeich@gmail.com> for identifying and fixing
this issue.

Affected users should upgrade to OpenSSL 1.0.0f.

Reference: http://openssl.org/news/secadv_20120104.txt

Comment 1 Vincent Danen 2012-01-04 18:07:07 EST

Seems to be the fix here:

http://cvs.openssl.org/chngview?cn=21957

Comment 2 Tomas Mraz 2012-01-05 03:54:03 EST

GOST Engine is not being compiled on Fedora and RHEL due to requirement of EC crypto.

Comment 3 Tomas Hoger 2012-01-05 04:18:39 EST

Additionally, openssl versions in Red Hat Enterprise Linux 5 and earlier do not include GOST at all.

Comment 4 Tomas Hoger 2012-01-05 04:20:15 EST

Statement:

Not vulnerable. This issue did not affect the versions of openssl as shipped with Red Hat Enterprise Linux 3, 4, 5 and 6, as they did not include GOST engine support.

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