National Cyber-Alert System

Vulnerability Summary for CVE-2008-5161

Overview

Error handling in the SSH protocol in (1) SSH Tectia Client and Server and Connector 4.0 through 4.4.11, 5.0 through 5.2.4, and 5.3 through 5.3.8; Client and Server and ConnectSecure 6.0 through 6.0.4; Server for Linux on IBM System z 6.0.4; Server for IBM z/OS 5.5.1 and earlier, 6.0.0, and 6.0.1; and Client 4.0-J through 4.3.3-J and 4.0-K through 4.3.10-K; and (2) OpenSSH 4.7p1 and possibly other versions, when using a block cipher algorithm in Cipher Block Chaining (CBC) mode, makes it easier for remote attackers to recover certain plaintext data from an arbitrary block of ciphertext in an SSH session via unknown vectors.

Description

http://securitytracker.com/alerts/2008/Nov/1021235.html CBC mode connections are affected

Impact

CVSS Severity (version 2.0):

CVSS Version 2 Metrics:

Solution

With a valid username and password patches are available at the following link: https://downloads.ssh.com/}

Vendor Statments (disclaimer)

Official Statement from Red Hat (02/17/2009)

After reviewing the upstream fix for this issue, Red Hat does not intent to address this flaw at this time. A future update may address this issue.

References to Advisories, Solutions, and Tools

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US-CERT Vulnerability Note: VU#958563

Name: VU#958563

Hyperlink:http://www.kb.cert.org/vuls/id/958563

External Source: XF

Name: openssh-sshtectia-cbc-info-disclosure(46620)

Hyperlink:http://xforce.iss.net/xforce/xfdb/46620

External Source: VUPEN

Name: ADV-2009-1135

Hyperlink:http://www.vupen.com/english/advisories/2009/1135

External Source: CONFIRM

Name: http://www.ssh.com/company/news/article/953/

Type: Advisory

Hyperlink:http://www.ssh.com/company/news/article/953/

External Source: SECTRACK

Name: 1021382

Hyperlink:http://www.securitytracker.com/id?1021382

External Source: SECTRACK

Name: 1021236

Hyperlink:http://www.securitytracker.com/id?1021236

External Source: SECTRACK

Name: 1021235

Hyperlink:http://www.securitytracker.com/id?1021235

External Source: BID

Name: 32319

Hyperlink:http://www.securityfocus.com/bid/32319

External Source: BUGTRAQ

Name: 20081123 Revised: OpenSSH security advisory: cbc.adv

Hyperlink:http://www.securityfocus.com/archive/1/archive/1/498579/100/0/threaded

External Source: BUGTRAQ

Name: 20081121 OpenSSH security advisory: cbc.adv

Hyperlink:http://www.securityfocus.com/archive/1/archive/1/498558/100/0/threaded

External Source: CONFIRM

Name: http://www.rtpro.yamaha.co.jp/RT/FAQ/Security/CPNI957037.html

Hyperlink:http://www.rtpro.yamaha.co.jp/RT/FAQ/Security/CPNI957037.html

External Source: VUPEN

Name: ADV-2008-3409

Hyperlink:http://www.frsirt.com/english/advisories/2008/3409

External Source: VUPEN

Name: ADV-2008-3173

Type: Advisory

Hyperlink:http://www.frsirt.com/english/advisories/2008/3173

External Source: VUPEN

Name: ADV-2008-3172

Type: Advisory

Hyperlink:http://www.frsirt.com/english/advisories/2008/3172

External Source: MISC

Name: http://www.cpni.gov.uk/Docs/Vulnerability_Advisory_SSH.txt

Hyperlink:http://www.cpni.gov.uk/Docs/Vulnerability_Advisory_SSH.txt

External Source: MISC

Name: http://support.avaya.com/elmodocs2/security/ASA-2008-503.htm

Hyperlink:http://support.avaya.com/elmodocs2/security/ASA-2008-503.htm

External Source: CONFIRM

Name: http://support.attachmate.com/techdocs/2398.html

Hyperlink:http://support.attachmate.com/techdocs/2398.html

External Source: SUNALERT

Name: 247186

Hyperlink:http://sunsolve.sun.com/search/document.do?assetkey=1-66-247186-1

External Source: SECUNIA

Name: 34857

Hyperlink:http://secunia.com/advisories/34857

External Source: SECUNIA

Name: 33308

Hyperlink:http://secunia.com/advisories/33308

External Source: SECUNIA

Name: 33121

Hyperlink:http://secunia.com/advisories/33121

External Source: SECUNIA

Name: 32833

Hyperlink:http://secunia.com/advisories/32833

External Source: SECUNIA

Name: 32760

Type: Advisory

Hyperlink:http://secunia.com/advisories/32760

External Source: SECUNIA

Name: 32740

Type: Advisory

Hyperlink:http://secunia.com/advisories/32740

External Source: OSVDB

Name: 50036

Hyperlink:http://osvdb.org/50036

External Source: OSVDB

Name: 50035

Hyperlink:http://osvdb.org/50035

External Source: OSVDB

Name: 49872

Hyperlink:http://osvdb.org/49872

External Source: CONFIRM

Name: http://openssh.org/txt/cbc.adv

Hyperlink:http://openssh.org/txt/cbc.adv

External Source: HP

Name: HPSBMA02447

Hyperlink:http://marc.info/?l=bugtraq&m=125017764422557&w=2

External Source: HP

Name: HPSBMA02447

Hyperlink:http://marc.info/?l=bugtraq&m=125017764422557&w=2

External Source: MISC

Name: http://isc.sans.org/diary.html?storyid=5366

Hyperlink:http://isc.sans.org/diary.html?storyid=5366