Zero-friction vulnerability management platform

Mageni eases for you the vulnerability scanning, assessment, and management process. It is free and open-source.

Install Now

Available for macOS, Windows, and Linux

App screenshot

Debian Security Advisory DSA 1638-1 (openssh)

Information

Severity

Severity

Critical

Family

Family

Debian Local Security Checks

CVSSv2 Base

CVSSv2 Base

9.3

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:M/Au:N/C:C/I:C/A:C

Solution Type

Solution Type

Vendor Patch

Created

Created

14 years ago

Modified

Modified

5 years ago

Summary

The remote host is missing an update to openssh announced via advisory DSA 1638-1.

Insight

Insight

It has been discovered that the signal handler implementing the login timeout in Debian's version of the OpenSSH server uses functions which are not async-signal-safe, leading to a denial of service vulnerability (CVE-2008-4109). The problem was originally corrected in OpenSSH 4.4p1 (CVE-2006-5051), but the patch backported to the version released with etch was incorrect. Systems affected by this issue suffer from lots of zombie sshd processes. Processes stuck with a [net] process title have also been observed. Over time, a sufficient number of processes may accumulate such that further login attempts are impossible. Presence of these processes does not indicate active exploitation of this vulnerability. It is possible to trigger this denial of service condition by accident. For the stable distribution (etch), this problem has been fixed in version 4.3p2-9etch3. For the unstable distribution (sid) and the testing distribution (lenny), this problem has been fixed in version 4.6p1-1. We recommend that you upgrade your openssh packages.

Solution

Solution

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201638-1

Common Vulnerabilities and Exposures (CVE)