Unrated severityNVD Advisory· Published Sep 18, 2008· Updated Jun 16, 2026
CVE-2008-4109
CVE-2008-4109
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
68cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*+ 66 more
- cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*range: <=4.3p2
- cpe:2.3:a:openbsd:openssh:1.2:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:1.2.1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:1.2.2:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:1.2.27:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:1.2.3:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:1.3:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:1.5:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:1.5.7:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:1.5.8:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:2:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:2.1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:2.1.1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:2.2:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:2.3:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:2.3.1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:2.5:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:2.5.1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:2.5.2:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:2.9:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:2.9.9:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:2.9.9p2:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:2.9p1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:2.9p2:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.0:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.0.1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.0.1p1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.0.2:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.0.2p1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.0p1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.1p1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.2:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.2.2:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.2.2p1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.2.3p1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.3:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.3p1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.4:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.4p1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.5:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.5p1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.6:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.6.1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.6.1p1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.6.1p2:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.7:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.7.1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.7.1p1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.7.1p2:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.8:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.8.1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.8.1p1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.9:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.9.1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.9.1p1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:4.0:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:4.0p1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:4.1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:4.1p1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:4.2:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:4.2p1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:4.3:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:4.3p1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:4.3p2:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:4.4:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:4.4p1:*:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
10- www.debian.org/security/2008/dsa-1638nvdPatch
- bugs.debian.org/cgi-bin/bugreport.cginvd
- lists.opensuse.org/opensuse-security-announce/2008-10/msg00004.htmlnvd
- secunia.com/advisories/31885nvd
- secunia.com/advisories/32080nvd
- secunia.com/advisories/32181nvd
- www.openwall.com/lists/oss-security/2024/07/01/3nvd
- www.securitytracker.com/idnvd
- www.ubuntu.com/usn/usn-649-1nvd
- exchange.xforce.ibmcloud.com/vulnerabilities/45202nvd
News mentions
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