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[OpenPKG-SA-2006.022] OpenPKG Security Advisory (openssh)
From: OpenPKG <openpkg () openpkg org>
Date: Sun, 1 Oct 2006 10:27:15 +0200

Hash: SHA1


OpenPKG Security Advisory                            The OpenPKG Project
http://www.openpkg.org/security/                  http://www.openpkg.org
openpkg-security () openpkg org                         openpkg () openpkg org
OpenPKG-SA-2006.022                                          01-Oct-2006

Package:          openssh
Vulnerability:    denial of service
OpenPKG Specific: no

OpenPKG Series:   Affected Packages:          Corrected Packages:
CURRENT           <= openssh-4.3p2-20060924   >= openssh-4.4p1-20060928
2-STABLE          <= openssh-4.3p2-2.20060622 >= openssh-4.4p1-2.20060929
2-STABLE-20060622 <= openssh-4.3p2-2.20060622 >= openssh-4.4p1-2.20060929
2.5-RELEASE       <= openssh-4.2p1-2.5.3      >= openssh-4.2p1-2.5.4

  According to a vendor security advisory [0], multiple vulnerabilities
  exist in the Secure Shell (SSH) implementation OpenSSH [1]:

  First, a pre-authentication denial of service was found by Tavis
  Ormandy that would cause sshd(8) to spin until the login grace time
  expired. The Common Vulnerabilities and Exposures (CVE) project
  assigned the ids CVE-2006-4924 [2] and CVE-2006-4925 [3] to the

  Second, an unsafe signal handler, reported by Mark Dowd, was fixed.
  The signal handler was vulnerable to a race condition that could be
  exploited to perform a pre-authentication denial of service. This
  vulnerability could theoretically lead to pre-authentication remote
  code execution if some authentication methods like GSSAPI are enabled,
  but the likelihood of successful exploitation appears remote. The
  Common Vulnerabilities and Exposures (CVE) project assigned the id
  CVE-2006-5051 [4] to the problem.

  [0] http://www.openssh.com/txt/release-4.4 
  [1] http://www.openssh.com/
  [2] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4924
  [3] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4925
  [4] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5051

For security reasons, this advisory was digitally signed with the
OpenPGP public key "OpenPKG <openpkg () openpkg org>" (ID 63C4CB9F) of the
OpenPKG project which you can retrieve from http://pgp.openpkg.org and
hkp://pgp.openpkg.org. Follow the instructions on http://pgp.openpkg.org
for details on how to verify the integrity of this advisory.

Comment: OpenPKG <openpkg () openpkg org>


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