OpenSSH signal handler race condition

openssh-signal-handler-race-condition (29254) The risk level is classified as MediumMedium Risk

Description:

OpenSSH is vulnerable to a race condition caused by an unsafe signal handler. A remote attacker could exploit this vulnerability to cause a denial of service, and if GSSAPI authentication is enabled, execute arbitrary code on the system.

*CVSS:

Base Score: 5.6
  Access Vector: Remote
  Access Complexity: High
  Authentication: Not Required
  Confidentiality Impact: Partial
  Integrity Impact: Partial
  Availability Impact: Partial
 
Temporal Score: 4.1
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Denial of Service

Remedy:

Upgrade to the latest version of Mac OS X (10.4.9 or later) or apply Apple Security Update 2007-003. See References.

Upgrade to the latest version of OpenSSH (4.4 or later), available from the OpenSSH Web site. See References.

For Red Hat Linux:
Refer to RHSA-2006:0697-9 for patch, upgrade, or suggested workaround information. See References.

For Red Hat Linux 2.1:
Refer to RHSA-2006:0698-8 for patch, upgrade, or suggested workaround information. See References.

For Debian GNU/Linux (openssh):
Refer to DSA-1212-1 for patch, upgrade, or suggested workaround information. See References.

For SUSE Linux:
Refer to SUSE-SA:2006:062 for patch, upgrade, or suggested workaround information. See References.

For other distributions:
Contact your vendor for upgrade or patch information.

References:

Platforms Affected:

  • Canonical Ubuntu 5.04
  • Canonical Ubuntu 5.10
  • Canonical Ubuntu 6.06 LTS
  • Debian Debian Linux 3.1
  • Debian Debian Linux 4.0
  • Gentoo Linux
  • MandrakeSoft Mandrake Linux 2006 X86_64
  • MandrakeSoft Mandrake Linux 2006
  • MandrakeSoft Mandrake Linux 2007
  • MandrakeSoft Mandrake Linux 2007 X86_64
  • MandrakeSoft Mandrake Linux Corporate Server 3.0 X86_64
  • MandrakeSoft Mandrake Linux Corporate Server 3.0
  • MandrakeSoft Mandrake Linux Corporate Server 4.0
  • MandrakeSoft Mandrake Linux Corporate Server 4.0 X86_64
  • MandrakeSoft Mandrake Multi Network Firewall 2.0
  • Novell Linux Desktop 9
  • Novell Linux POS 9
  • Novell Open Enterprise Server
  • Novell Open Enterprise Server
  • Novell UnitedLinux 1.0
  • OpenBSD OpenSSH 1.2
  • OpenBSD OpenSSH 1.2.1
  • OpenBSD OpenSSH 1.2.2
  • OpenBSD OpenSSH 1.2.27
  • OpenBSD OpenSSH 1.2.3
  • OpenBSD OpenSSH 2.1
  • OpenBSD OpenSSH 2.1.1
  • OpenBSD OpenSSH 2.1.1p4
  • OpenBSD OpenSSH 2.2
  • OpenBSD OpenSSH 2.2.0p1
  • OpenBSD OpenSSH 2.3
  • OpenBSD OpenSSH 2.3.0p1
  • OpenBSD OpenSSH 2.5
  • OpenBSD OpenSSH 2.5.1
  • OpenBSD OpenSSH 2.5.1p1
  • OpenBSD OpenSSH 2.5.1p2
  • OpenBSD OpenSSH 2.5.2
  • OpenBSD OpenSSH 2.5.2p1
  • OpenBSD OpenSSH 2.5.2p2
  • OpenBSD OpenSSH 2.9
  • OpenBSD OpenSSH 2.9.9
  • OpenBSD OpenSSH 2.9.9p1
  • OpenBSD OpenSSH 2.9.9p2
  • OpenBSD OpenSSH 2.9p1
  • OpenBSD OpenSSH 2.9p2
  • OpenBSD OpenSSH 3.0
  • OpenBSD OpenSSH 3.0.1
  • OpenBSD OpenSSH 3.0.1p1
  • OpenBSD OpenSSH 3.0.2
  • OpenBSD OpenSSH 3.0.2p1
  • OpenBSD OpenSSH 3.0p1
  • OpenBSD OpenSSH 3.1
  • OpenBSD OpenSSH 3.1p1
  • OpenBSD OpenSSH 3.2
  • OpenBSD OpenSSH 3.2.2
  • OpenBSD OpenSSH 3.2.2p1
  • OpenBSD OpenSSH 3.2.3
  • OpenBSD OpenSSH 3.2.3p1
  • OpenBSD OpenSSH 3.3
  • OpenBSD OpenSSH 3.3p1
  • OpenBSD OpenSSH 3.4
  • OpenBSD OpenSSH 3.4p1
  • OpenBSD OpenSSH 3.5
  • OpenBSD OpenSSH 3.5p1
  • OpenBSD OpenSSH 3.6
  • OpenBSD OpenSSH 3.6.1
  • OpenBSD OpenSSH 3.6.1p1
  • OpenBSD OpenSSH 3.6.1p2
  • OpenBSD OpenSSH 3.7
  • OpenBSD OpenSSH 3.7.1
  • OpenBSD OpenSSH 3.7.1p1
  • OpenBSD OpenSSH 3.7.1p2
  • OpenBSD OpenSSH 3.8
  • OpenBSD OpenSSH 3.8.1
  • OpenBSD OpenSSH 3.8.1p1
  • OpenBSD OpenSSH 3.9
  • OpenBSD OpenSSH 3.9.1
  • OpenBSD OpenSSH 3.9.1p1
  • OpenBSD OpenSSH 4.0
  • OpenBSD OpenSSH 4.0p1
  • OpenBSD OpenSSH 4.1p1
  • OpenBSD OpenSSH 4.2
  • OpenBSD OpenSSH 4.2p1
  • OpenBSD OpenSSH 4.3
  • OpenBSD OpenSSH 4.3p1
  • OpenBSD OpenSSH 4.3p2
  • OpenPKG OpenPKG 2-STABLE
  • OpenPKG OpenPKG 2.5
  • OpenPKG OpenPKG CURRENT
  • RedHat Enterprise Linux 2.1 WS
  • RedHat Enterprise Linux 2.1 AS
  • RedHat Enterprise Linux 2.1 ES
  • RedHat Enterprise Linux 3 ES
  • RedHat Enterprise Linux 3 AS
  • RedHat Enterprise Linux 3 WS
  • RedHat Enterprise Linux 3 Desktop
  • RedHat Enterprise Linux 4 ES
  • RedHat Enterprise Linux 4 AS
  • RedHat Enterprise Linux 4 WS
  • RedHat Enterprise Linux 4 Desktop
  • RedHat Linux Advanced Workstation 2.1 Itanium
  • SuSE Linux Enterprise Server 8
  • SUSE SuSE Linux 10.0
  • SUSE SuSE Linux 10.1
  • SUSE SuSE Linux 9.2
  • SUSE SuSE Linux 9.3
  • SuSE SuSE Linux Desktop 1.0
  • SuSE SuSE Linux OpenExchange Server 4
  • SuSE SuSE Linux Retail Solution 8
  • SuSE SuSE Linux School Server
  • SuSE SuSE Linux Standard Server 8
  • SuSE SuSE SLED 10
  • SuSE SuSE SLES 10
  • SuSE SuSE SLES 9
  • Turbolinux Turbolinux 10 Desktop
  • Turbolinux Turbolinux 10 F...
  • Turbolinux Turbolinux 10 Server
  • Turbolinux Turbolinux 10 Server x64 Ed
  • Turbolinux Turbolinux 7 Server
  • Turbolinux Turbolinux 8 Server
  • Turbolinux Turbolinux FUJI
  • Turbolinux Turbolinux Home
  • Turbolinux Turbolinux Multimedia
  • Turbolinux Turbolinux Personal
  • Turbolinux Turbolinux Appliance Server 1.0 Hosting Ed
  • Turbolinux Turbolinux Appliance Server 1.0 Workgroup Ed
  • Turbolinux Turbolinux Appliance Server 2.0

Reported:

Sep 27, 2006

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For corrections or additions please email xforce@iss.net

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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