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Last updated: 7/23/2014 1:56:17 AM

CVE Publication rate: 18.43

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Vulnerability Workload Index: 6.34
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National Cyber Awareness System

Vulnerability Summary for CVE-2008-4109

Original release date: 09/18/2008
Last revised: 02/12/2009
Source: US-CERT/NIST

Overview

A certain Debian patch for OpenSSH before 4.3p2-9etch3 on etch; before 4.6p1-1 on sid and lenny; and on other distributions such as SUSE uses functions that are not async-signal-safe in the signal handler for login timeouts, which allows remote attackers to cause a denial of service (connection slot exhaustion) via multiple login attempts. NOTE: this issue exists because of an incorrect fix for CVE-2006-5051.

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score: 5.0 (MEDIUM) (AV:N/AC:L/Au:N/C:N/I:N/A:P) (legend)
Impact Subscore: 2.9
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 (01/01/1900)
Not vulnerable. The patch used to fix CVE-2006-5051 in Red Hat Enterprise Linux 2.1, 3, 4, and 5 was complete and does not suffer from this problem.

References to Advisories, Solutions, and Tools

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External Source: UBUNTU
Name: USN-649-1
External Source: CONFIRM
Name: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=498678
External Source: SECTRACK
Name: 1020891
External Source: DEBIAN
Name: DSA-1638
Type: Patch Information
External Source: SECUNIA
Name: 32181
External Source: SECUNIA
Name: 31885
External Source: SUSE
Name: SUSE-SR:2008:020
External Source: SECUNIA
Name: 32080
External Source: XF
Name: openssh-signalhandler-dos(45202)

Vulnerable software and versions

Skip Navigation Links.
Collapse Configuration 1Configuration 1
Collapse ANDAND
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cpe:/a:debian:linux:unknown:unknown:sid
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* cpe:/a:openbsd:openssh:4.0p1
* cpe:/a:openbsd:openssh:4.1p1
* 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:4.1
* cpe:/a:openbsd:openssh:2.3.1
* cpe:/a:openbsd:openssh:2.3
* cpe:/a:openbsd:openssh:3.0.2p1
* cpe:/a:openbsd:openssh:2.5
* cpe:/a:openbsd:openssh:2.1.1
* cpe:/a:openbsd:openssh:2.2
* cpe:/a:openbsd:openssh:2
* cpe:/a:openbsd:openssh:2.1
* cpe:/a:openbsd:openssh:1.5.7
* cpe:/a:openbsd:openssh:1.5.8
* cpe:/a:openbsd:openssh:1.3
* cpe:/a:openbsd:openssh:1.5
* cpe:/a:openbsd:openssh:1.2.27
* cpe:/a:openbsd:openssh:1.2.3
* cpe:/a:openbsd:openssh:1.2.1
* cpe:/a:openbsd:openssh:1.2.2
* cpe:/a:openbsd:openssh:1.2
* cpe:/a:openbsd:openssh:3.1
* cpe:/a:openbsd:openssh:3.2
* cpe:/a:openbsd:openssh:3.1p1
* cpe:/a:openbsd:openssh:3.0.1
* cpe:/a:openbsd:openssh:3.0p1
* cpe:/a:openbsd:openssh:3.0.2
* cpe:/a:openbsd:openssh:3.0.1p1
* cpe:/a:openbsd:openssh:2.9.9
* cpe:/a:openbsd:openssh:2.9p2
* cpe:/a:openbsd:openssh:3.0
* cpe:/a:openbsd:openssh:2.9.9p2
* cpe:/a:openbsd:openssh:2.5.2
* cpe:/a:openbsd:openssh:2.5.1
* cpe:/a:openbsd:openssh:2.9p1
* cpe:/a:openbsd:openssh:2.9
* 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:3.5p1
* cpe:/a:openbsd:openssh:3.6
* cpe:/a:openbsd:openssh:3.6.1
* cpe:/a:openbsd:openssh:3.6.1p1
* cpe:/a:openbsd:openssh:3.3p1
* cpe:/a:openbsd:openssh:3.4
* cpe:/a:openbsd:openssh:3.4p1
* cpe:/a:openbsd:openssh:3.5
* 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:4.2
* cpe:/a:openbsd:openssh:4.2p1
* cpe:/a:openbsd:openssh:4.3
* cpe:/a:openbsd:openssh:4.3p1
* cpe:/a:openbsd:openssh:4.3p2
* cpe:/a:openbsd:openssh:4.4
* cpe:/a:openbsd:openssh:4.4p1
* cpe:/a:openbsd:openssh:4.6 and previous versions
Collapse Configuration 2Configuration 2
Collapse ANDAND
Collapse OROR
cpe:/a:debian:linux:unknown:unknown:etch
Collapse OROR
* cpe:/a:openbsd:openssh:4.0p1
* cpe:/a:openbsd:openssh:4.1p1
* 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:4.1
* cpe:/a:openbsd:openssh:2.3.1
* cpe:/a:openbsd:openssh:2.3
* cpe:/a:openbsd:openssh:3.0.2p1
* cpe:/a:openbsd:openssh:2.5
* cpe:/a:openbsd:openssh:2.1.1
* cpe:/a:openbsd:openssh:2.2
* cpe:/a:openbsd:openssh:2
* cpe:/a:openbsd:openssh:2.1
* cpe:/a:openbsd:openssh:1.5.7
* cpe:/a:openbsd:openssh:1.5.8
* cpe:/a:openbsd:openssh:1.3
* cpe:/a:openbsd:openssh:1.5
* cpe:/a:openbsd:openssh:1.2.27
* cpe:/a:openbsd:openssh:1.2.3
* cpe:/a:openbsd:openssh:1.2.1
* cpe:/a:openbsd:openssh:1.2.2
* cpe:/a:openbsd:openssh:1.2
* cpe:/a:openbsd:openssh:3.1
* cpe:/a:openbsd:openssh:3.2
* cpe:/a:openbsd:openssh:3.1p1
* cpe:/a:openbsd:openssh:3.0.1
* cpe:/a:openbsd:openssh:3.0p1
* cpe:/a:openbsd:openssh:3.0.2
* cpe:/a:openbsd:openssh:3.0.1p1
* cpe:/a:openbsd:openssh:2.9.9
* cpe:/a:openbsd:openssh:2.9p2
* cpe:/a:openbsd:openssh:3.0
* cpe:/a:openbsd:openssh:2.9.9p2
* cpe:/a:openbsd:openssh:2.5.2
* cpe:/a:openbsd:openssh:2.5.1
* cpe:/a:openbsd:openssh:2.9p1
* cpe:/a:openbsd:openssh:2.9
* 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:3.5p1
* cpe:/a:openbsd:openssh:3.6
* cpe:/a:openbsd:openssh:3.6.1
* cpe:/a:openbsd:openssh:3.6.1p1
* cpe:/a:openbsd:openssh:3.3p1
* cpe:/a:openbsd:openssh:3.4
* cpe:/a:openbsd:openssh:3.4p1
* cpe:/a:openbsd:openssh:3.5
* 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:4.2
* cpe:/a:openbsd:openssh:4.2p1
* cpe:/a:openbsd:openssh:4.3
* cpe:/a:openbsd:openssh:4.3p1
* cpe:/a:openbsd:openssh:4.3p2 and previous versions
* Denotes Vulnerable Software
Changes related to vulnerability configurations

Technical Details

Vulnerability Type (View All)