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CVE-2008-4109

5.0 · MEDIUM

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…

Published Sep 18, 2008debianCWE-264EPSS 28.39%

Overview

CVE-2008-4109 is a medium-severity vulnerability affecting debian linux. It was published on September 18, 2008 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories and patches from debian. Update linux to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
openbsdopenssh0Affected

References

Refbugs.debian.org/cgi-bin/bugreport.cgi?bug=498678Reflists.opensuse.org/opensuse-security-announce/2008-10/msg00004.htmlRefsecunia.com/advisories/31885Refsecunia.com/advisories/32080Refsecunia.com/advisories/32181Refwww.debian.org/security/2008/dsa-1638Refwww.openwall.com/lists/oss-security/2024/07/01/3Refwww.securitytracker.com/id?1020891Refwww.ubuntu.com/usn/usn-649-1Refexchange.xforce.ibmcloud.com/vulnerabilities/45202

How CyberStrike helps

Frequently asked questions

What is CVE-2008-4109?

CVE-2008-4109 is a medium-severity vulnerability affecting debian linux. It was published on September 18, 2008 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

How severe is CVE-2008-4109?

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2008-4109?

Check the references section for vendor advisories and patches from debian. Update linux to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2008-4109?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2008-4109 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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