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.

Category

5.0
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 1.11% Top 25%
Vendor Advisory ubuntu.com Vendor Advisory debian.org Vendor Advisory opensuse.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.ubuntu.com/usn/usn-649-1 vendor advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/45202 vdb entry
http://secunia.com/advisories/31885 third party advisory
http://www.securitytracker.com/id?1020891 vdb entry
http://www.debian.org/security/2008/dsa-1638 patch vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2008-10/msg00004.html vendor advisory
http://secunia.com/advisories/32080 third party advisory
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=498678
http://secunia.com/advisories/32181 third party advisory
http://www.openwall.com/lists/oss-security/2024/07/01/3 mailing list

Frequently Asked Questions

What is the severity of CVE-2008-4109?
CVE-2008-4109 has been scored as a medium severity vulnerability.
How to fix CVE-2008-4109?
To fix CVE-2008-4109, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2008-4109 being actively exploited in the wild?
It is possible that CVE-2008-4109 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.