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Last updated: 12/21/2014 12:56:50 PM

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National Cyber Awareness System

Vulnerability Summary for CVE-2006-4924

Original release date: 09/26/2006
Last revised: 09/02/2013
Source: US-CERT/NIST

Overview

sshd in OpenSSH before 4.4, when using the version 1 SSH protocol, allows remote attackers to cause a denial of service (CPU consumption) via an SSH packet that contains duplicate blocks, which is not properly handled by the CRC compensation attack detector.

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score: 7.8 (HIGH) (AV:N/AC:L/Au:N/C:N/I:N/A:C) (legend)
Impact Subscore: 6.9
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows disruption of service

Vendor Statements (disclaimer)

Official Statement from Red Hat (03/14/2007)
Red Hat Enterprise Linux 5 is not vulnerable to this issue as it contains a backported patch.

References to Advisories, Solutions, and Tools

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External Source: SGI
Name: 20061001-01-P
External Source: SUSE
Name: SUSE-SR:2006:024
External Source: SECUNIA
Name: 22208
Type: Advisory
External Source: SECUNIA
Name: 22926
Type: Advisory
External Source: CONFIRM
Name: http://www.vmware.com/support/vi3/doc/esx-3069097-patch.html
External Source: VUPEN
Name: ADV-2009-0740
External Source: SECUNIA
Name: 22091
Type: Advisory
External Source: DEBIAN
Name: DSA-1212
Type: Patch Information
External Source: MLIST
Name: [openssh-unix-dev] 20060927 Announce: OpenSSH 4.4 released
External Source: SECUNIA
Name: 24805
US-CERT Vulnerability Note: CERT-VN
Name: VU#787448
External Source: CONFIRM
Name: http://sourceforge.net/forum/forum.php?forum_id=681763
External Source: XF
Name: openssh-block-dos(29158)
External Source: SECUNIA
Name: 22245
Type: Advisory
External Source: CONFIRM
Name: http://support.avaya.com/elmodocs2/security/ASA-2006-216.htm
External Source: SECUNIA
Name: 22823
Type: Advisory
External Source: MLIST
Name: [security-announce] 20070409 Globus Security Advisory 2007-02: GSI-OpenSSH vulnerability
External Source: OPENPKG
Name: OpenPKG-SA-2006.022
External Source: CONFIRM
Name: http://bugs.gentoo.org/show_bug.cgi?id=148228
External Source: DEBIAN
Name: DSA-1189
Type: Patch Information
External Source: VUPEN
Name: ADV-2006-3777
External Source: MISC
Name: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=207955
Type: Advisory; Patch Information
External Source: GENTOO
Name: GLSA-200609-17
External Source: MANDRIVA
Name: MDKSA-2006:179
External Source: SECUNIA
Name: 22495
Type: Advisory
External Source: SECUNIA
Name: 22236
Type: Advisory
External Source: UBUNTU
Name: USN-355-1
External Source: SECUNIA
Name: 34274
US-CERT Vulnerability Note: OVAL
Name: oval:org.mitre.oval:def:1193
Type: Tool Signature
External Source: SECUNIA
Name: 21923
Type: Advisory
External Source: SECUNIA
Name: 22183
Type: Advisory
External Source: SECUNIA
Name: 24479
External Source: REDHAT
Name: RHSA-2006:0697
External Source: CONFIRM
Name: http://docs.info.apple.com/article.html?artnum=305214
External Source: SECUNIA
Name: 23241
Type: Advisory
External Source: SECUNIA
Name: 29371
External Source: SECUNIA
Name: 22270
Type: Advisory
External Source: APPLE
Name: APPLE-SA-2007-03-13
External Source: BUGTRAQ
Name: 20060927 rPSA-2006-0174-1 gnome-ssh-askpass openssh openssh-client openssh-server
External Source: SECTRACK
Name: 1016931
External Source: OPENBSD
Name: [2.9] 015: SECURITY FIX: October 12, 2006
External Source: SLACKWARE
Name: SSA:2006-272-02
External Source: VUPEN
Name: ADV-2006-4401
External Source: VUPEN
Name: ADV-2006-4869
External Source: BID
Name: 20216
Type: Patch Information; Exploit
External Source: SECUNIA
Name: 23038
Type: Advisory
External Source: SECUNIA
Name: 22158
Type: Advisory
External Source: TRUSTIX
Name: 2006-0054
External Source: SUNALERT
Name: 102962
External Source: FREEBSD
Name: FreeBSD-SA-06:22.openssh
External Source: CONFIRM
Name: http://blogs.sun.com/security/entry/sun_alert_102962_security_vulnerability
External Source: OVAL
Name: oval:org.mitre.oval:def:10462
External Source: OSVDB
Name: 29152
External Source: CONFIRM
Name: http://www.vmware.com/support/vi3/doc/esx-9986131-patch.html
External Source: SCO
Name: SCOSA-2008.2
US-CERT Vulnerability Note: CERT
Name: TA07-072A
External Source: GENTOO
Name: GLSA-200611-06
External Source: CONFIRM
Name: http://support.avaya.com/elmodocs2/security/ASA-2006-262.htm
External Source: SUSE
Name: SUSE-SA:2006:062
External Source: VUPEN
Name: ADV-2007-2119
External Source: SECUNIA
Name: 25608
External Source: HP
Name: SSRT061267
External Source: SECUNIA
Name: 22196
Type: Advisory
External Source: SECUNIA
Name: 22352
Type: Advisory
External Source: SECUNIA
Name: 23680
External Source: CONFIRM
Name: https://issues.rpath.com/browse/RPL-661
External Source: SECUNIA
Name: 23340
Type: Advisory
External Source: VUPEN
Name: ADV-2007-1332
External Source: SECUNIA
Name: 24799
External Source: SECUNIA
Name: 22116
Type: Advisory
External Source: FREEBSD
Name: FreeBSD-SA-06:22
External Source: SECUNIA
Name: 22164
Type: Advisory
External Source: REDHAT
Name: RHSA-2006:0698
External Source: SECUNIA
Name: 22362
Type: Advisory
External Source: SECUNIA
Name: 22298
Type: Advisory
External Source: CONFIRM
Name: http://sourceforge.net/project/shownotes.php?release_id=461863&group_id=69227
External Source: CONFIRM
Name: https://hypersonic.bluecoat.com/support/securityadvisories/ssh_server_on_sg
External Source: SECUNIA
Name: 22487
Type: Advisory
External Source: VUPEN
Name: ADV-2007-0930

References to Check Content

Identifier: oval:org.mitre.oval:def:10462
Check System: http://oval.mitre.org/XMLSchema/oval-definitions-5
Identifier: oval:org.mitre.oval:def:1193
Check System: http://oval.mitre.org/XMLSchema/oval-definitions-5

Vulnerable software and versions

+ Configuration 1
+ OR
* cpe:/a:openbsd:openssh:1.2
* cpe:/a:openbsd:openssh:1.2.1
* cpe:/a:openbsd:openssh:1.2.2
* cpe:/a:openbsd:openssh:1.2.27
* cpe:/a:openbsd:openssh:1.2.3
* cpe:/a:openbsd:openssh:2.1
* cpe:/a:openbsd:openssh:2.1.1
* cpe:/a:openbsd:openssh:2.2
* cpe:/a:openbsd:openssh:2.3
* cpe:/a:openbsd:openssh:2.5
* cpe:/a:openbsd:openssh:2.5.1
* cpe:/a:openbsd:openssh:2.5.2
* cpe:/a:openbsd:openssh:2.9
* cpe:/a:openbsd:openssh:2.9.9
* cpe:/a:openbsd:openssh:2.9.9p2
* cpe:/a:openbsd:openssh:2.9p1
* cpe:/a:openbsd:openssh:2.9p2
* cpe:/a:openbsd:openssh:3.0
* cpe:/a:openbsd:openssh:3.0.1
* cpe:/a:openbsd:openssh:3.0.1p1
* cpe:/a:openbsd:openssh:3.0.2
* cpe:/a:openbsd:openssh:3.0.2p1
* cpe:/a:openbsd:openssh:3.0p1
* cpe:/a:openbsd:openssh:3.1
* cpe:/a:openbsd:openssh:3.1p1
* cpe:/a:openbsd:openssh:3.2
* cpe:/a:openbsd:openssh:3.2.2
* cpe:/a:openbsd:openssh:3.2.2p1
* cpe:/a:openbsd:openssh:3.2.3p1
* cpe:/a:openbsd:openssh:3.3
* cpe:/a:openbsd:openssh:3.3p1
* cpe:/a:openbsd:openssh:3.4
* cpe:/a:openbsd:openssh:3.4p1
* cpe:/a:openbsd:openssh:3.5
* cpe:/a:openbsd:openssh:3.5p1
* cpe:/a:openbsd:openssh:3.6
* cpe:/a:openbsd:openssh:3.6.1
* cpe:/a:openbsd:openssh:3.6.1p1
* cpe:/a:openbsd:openssh:3.6.1p2
* cpe:/a:openbsd:openssh:3.7
* cpe:/a:openbsd:openssh:3.7.1
* cpe:/a:openbsd:openssh:3.7.1p1
* cpe:/a:openbsd:openssh:3.7.1p2
* cpe:/a:openbsd:openssh:3.8
* cpe:/a:openbsd:openssh:3.8.1
* cpe:/a:openbsd:openssh:3.8.1p1
* cpe:/a:openbsd:openssh:3.9
* cpe:/a:openbsd:openssh:3.9.1
* cpe:/a:openbsd:openssh:3.9.1p1
* cpe:/a:openbsd:openssh:4.0
* cpe:/a:openbsd:openssh:4.0p1
* cpe:/a:openbsd:openssh:4.1p1
* cpe:/a:openbsd:openssh:4.2
* cpe:/a:openbsd:openssh:4.2p1
* cpe:/a:openbsd:openssh:4.3
* cpe:/a:openbsd:openssh:4.3p1

* Denotes Vulnerable Software
Changes related to vulnerability configurations

Technical Details

Vulnerability Type (View All)
  • Resource Management Errors (CWE-399)