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.
Key facts
- CVSS score
- 5.0 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:P- Weakness (CWE)
- CWE-264
- EPSS score
- 28.6% (98th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2008-4092)
- Published
- September 18, 2008
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2008-4092 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- debian / linux
- debian / linux
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
- openbsd / openssh
and 19 more…
References
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=498678
- http://lists.opensuse.org/opensuse-security-announce/2008-10/msg00004.html
- http://secunia.com/advisories/31885
- http://secunia.com/advisories/32080
- http://secunia.com/advisories/32181
- http://www.debian.org/security/2008/dsa-1638(Patch)
- http://www.openwall.com/lists/oss-security/2024/07/01/3
- http://www.securitytracker.com/id?1020891
- http://www.ubuntu.com/usn/usn-649-1
- https://exchange.xforce.ibmcloud.com/vulnerabilities/45202
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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