Rapid7 Vulnerability & Exploit Database

OpenSSH Signal Handler Denial of Service

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OpenSSH Signal Handler Denial of Service

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:P)
Published
09/12/2008
Created
07/25/2018
Added
07/16/2009
Modified
02/13/2015

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.

Solution(s)

  • openbsd-openssh-upgrade-4_2p2
  • openbsd-openssh-upgrade-4_3p3
  • openbsd-openssh-upgrade-4_4p1
  • openbsd-openssh-upgrade-4_6p2

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