Vulnerability Monitor

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CVE-2008-4109

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.

Security Impact Summary

CVE-2008-4109 is a security vulnerability that . Impacting 2 products from debian, from openbsd organizations running these solutions should prioritize assessment and patching.

Historical Context

Originally identified in 2008, this vulnerability predates many modern security frameworks and practices. The vulnerability landscape of that era was characterized by different threat models and less mature defense mechanisms compared to contemporary standards.

Published

2008-09-18T15:04:27.437

Last Modified

2025-04-09T00:30:58.490

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 5.0 (MEDIUM)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-264
NVD-CWE-noinfo

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	debian	linux	unknown	No
Application	openbsd	openssh	≤ 4.3p2	Yes
Application	openbsd	openssh	1.2	Yes
Application	openbsd	openssh	1.2.1	Yes
Application	openbsd	openssh	1.2.2	Yes
Application	openbsd	openssh	1.2.3	Yes
Application	openbsd	openssh	1.2.27	Yes
Application	openbsd	openssh	1.3	Yes
Application	openbsd	openssh	1.5	Yes
Application	openbsd	openssh	1.5.7	Yes
Application	openbsd	openssh	1.5.8	Yes
Application	openbsd	openssh	2	Yes
Application	openbsd	openssh	2.1	Yes
Application	openbsd	openssh	2.1.1	Yes
Application	openbsd	openssh	2.2	Yes
Application	openbsd	openssh	2.3	Yes
Application	openbsd	openssh	2.3.1	Yes
Application	openbsd	openssh	2.5	Yes
Application	openbsd	openssh	2.5.1	Yes
Application	openbsd	openssh	2.5.2	Yes
Application	openbsd	openssh	2.9	Yes
Application	openbsd	openssh	2.9.9	Yes
Application	openbsd	openssh	2.9.9p2	Yes
Application	openbsd	openssh	2.9p1	Yes
Application	openbsd	openssh	2.9p2	Yes
Application	openbsd	openssh	3.0	Yes
Application	openbsd	openssh	3.0.1	Yes
Application	openbsd	openssh	3.0.1p1	Yes
Application	openbsd	openssh	3.0.2	Yes
Application	openbsd	openssh	3.0.2p1	Yes
Application	openbsd	openssh	3.0p1	Yes
Application	openbsd	openssh	3.1	Yes
Application	openbsd	openssh	3.1p1	Yes
Application	openbsd	openssh	3.2	Yes
Application	openbsd	openssh	3.2.2	Yes
Application	openbsd	openssh	3.2.2p1	Yes
Application	openbsd	openssh	3.2.3p1	Yes
Application	openbsd	openssh	3.3	Yes
Application	openbsd	openssh	3.3p1	Yes
Application	openbsd	openssh	3.4	Yes
Application	openbsd	openssh	3.4p1	Yes
Application	openbsd	openssh	3.5	Yes
Application	openbsd	openssh	3.5p1	Yes
Application	openbsd	openssh	3.6	Yes
Application	openbsd	openssh	3.6.1	Yes
Application	openbsd	openssh	3.6.1p1	Yes
Application	openbsd	openssh	3.6.1p2	Yes
Application	openbsd	openssh	3.7	Yes
Application	openbsd	openssh	3.7.1	Yes
Application	openbsd	openssh	3.7.1p1	Yes
Application	openbsd	openssh	3.7.1p2	Yes
Application	openbsd	openssh	3.8	Yes
Application	openbsd	openssh	3.8.1	Yes
Application	openbsd	openssh	3.8.1p1	Yes
Application	openbsd	openssh	3.9	Yes
Application	openbsd	openssh	3.9.1	Yes
Application	openbsd	openssh	3.9.1p1	Yes
Application	openbsd	openssh	4.0	Yes
Application	openbsd	openssh	4.0p1	Yes
Application	openbsd	openssh	4.1	Yes
Application	openbsd	openssh	4.1p1	Yes
Application	openbsd	openssh	4.2	Yes
Application	openbsd	openssh	4.2p1	Yes
Application	openbsd	openssh	4.3	Yes
Application	openbsd	openssh	4.3p1	Yes
Application	debian	linux	unknown	No
Application	openbsd	openssh	≤ 4.6	Yes
Application	openbsd	openssh	1.2	Yes
Application	openbsd	openssh	1.2.1	Yes
Application	openbsd	openssh	1.2.2	Yes
Application	openbsd	openssh	1.2.3	Yes
Application	openbsd	openssh	1.2.27	Yes
Application	openbsd	openssh	1.3	Yes
Application	openbsd	openssh	1.5	Yes
Application	openbsd	openssh	1.5.7	Yes
Application	openbsd	openssh	1.5.8	Yes
Application	openbsd	openssh	2	Yes
Application	openbsd	openssh	2.1	Yes
Application	openbsd	openssh	2.1.1	Yes
Application	openbsd	openssh	2.2	Yes
Application	openbsd	openssh	2.3	Yes
Application	openbsd	openssh	2.3.1	Yes
Application	openbsd	openssh	2.5	Yes
Application	openbsd	openssh	2.5.1	Yes
Application	openbsd	openssh	2.5.2	Yes
Application	openbsd	openssh	2.9	Yes
Application	openbsd	openssh	2.9.9	Yes
Application	openbsd	openssh	2.9.9p2	Yes
Application	openbsd	openssh	2.9p1	Yes
Application	openbsd	openssh	2.9p2	Yes
Application	openbsd	openssh	3.0	Yes
Application	openbsd	openssh	3.0.1	Yes
Application	openbsd	openssh	3.0.1p1	Yes
Application	openbsd	openssh	3.0.2	Yes
Application	openbsd	openssh	3.0.2p1	Yes
Application	openbsd	openssh	3.0p1	Yes
Application	openbsd	openssh	3.1	Yes
Application	openbsd	openssh	3.1p1	Yes
Application	openbsd	openssh	3.2	Yes
Application	openbsd	openssh	3.2.2	Yes
Application	openbsd	openssh	3.2.2p1	Yes
Application	openbsd	openssh	3.2.3p1	Yes
Application	openbsd	openssh	3.3	Yes
Application	openbsd	openssh	3.3p1	Yes
Application	openbsd	openssh	3.4	Yes
Application	openbsd	openssh	3.4p1	Yes
Application	openbsd	openssh	3.5	Yes
Application	openbsd	openssh	3.5p1	Yes
Application	openbsd	openssh	3.6	Yes
Application	openbsd	openssh	3.6.1	Yes
Application	openbsd	openssh	3.6.1p1	Yes
Application	openbsd	openssh	3.6.1p2	Yes
Application	openbsd	openssh	3.7	Yes
Application	openbsd	openssh	3.7.1	Yes
Application	openbsd	openssh	3.7.1p1	Yes
Application	openbsd	openssh	3.7.1p2	Yes
Application	openbsd	openssh	3.8	Yes
Application	openbsd	openssh	3.8.1	Yes
Application	openbsd	openssh	3.8.1p1	Yes
Application	openbsd	openssh	3.9	Yes
Application	openbsd	openssh	3.9.1	Yes
Application	openbsd	openssh	3.9.1p1	Yes
Application	openbsd	openssh	4.0	Yes
Application	openbsd	openssh	4.0p1	Yes
Application	openbsd	openssh	4.1	Yes
Application	openbsd	openssh	4.1p1	Yes
Application	openbsd	openssh	4.2	Yes
Application	openbsd	openssh	4.2p1	Yes
Application	openbsd	openssh	4.3	Yes
Application	openbsd	openssh	4.3p1	Yes
Application	openbsd	openssh	4.3p2	Yes
Application	openbsd	openssh	4.4	Yes
Application	openbsd	openssh	4.4p1	Yes

References

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=498678 ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2008-10/msg00004.html ([email protected])
http://secunia.com/advisories/31885 ([email protected])
http://secunia.com/advisories/32080 ([email protected])
http://secunia.com/advisories/32181 ([email protected])
http://www.debian.org/security/2008/dsa-1638 Patch ([email protected])
http://www.openwall.com/lists/oss-security/2024/07/01/3 ([email protected])
http://www.securitytracker.com/id?1020891 ([email protected])
http://www.ubuntu.com/usn/usn-649-1 ([email protected])
https://exchange.xforce.ibmcloud.com/vulnerabilities/45202 ([email protected])
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=498678 (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2008-10/msg00004.html (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/31885 (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/32080 (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/32181 (af854a3a-2127-422b-91ae-364da2661108)
http://www.debian.org/security/2008/dsa-1638 Patch (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2024/07/01/3 (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id?1020891 (af854a3a-2127-422b-91ae-364da2661108)
http://www.ubuntu.com/usn/usn-649-1 (af854a3a-2127-422b-91ae-364da2661108)
https://exchange.xforce.ibmcloud.com/vulnerabilities/45202 (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For debian's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.