Fetchmail NULL pointer dereference denial of service

fetchmail-null-pointer-dos (23713) The risk level is classified as LowLow Risk

Description:

Fetchmail is vulnerable to a denial of service attack, caused by a NULL pointer dereference when Fetchmail is configured for multidrop mode. A remote attacker, using a malicious mail server, could send a specially-crafted message without headers to cause affected Fetchmail clients to crash.

Platforms Affected:

  • Canonical, Ubuntu 4.10
  • Canonical, Ubuntu 5.04
  • Canonical, Ubuntu 5.10
  • Debian, Debian Linux 3.1
  • Eric S. Raymond, Fetchmail 6.2.5.4 and prior
  • Eric S. Raymond, Fetchmail 6.3.1 and prior
  • MandrakeSoft, Mandrake Linux 10.1 X86_64
  • MandrakeSoft, Mandrake Linux 10.1
  • MandrakeSoft, Mandrake Linux 2006 X86_64
  • MandrakeSoft, Mandrake Linux 2006
  • MandrakeSoft, Mandrake Linux LE2005
  • MandrakeSoft, Mandrake Linux LE2005 X86_64
  • MandrakeSoft, Mandrake Linux Corporate Server 3.0 X86_64
  • MandrakeSoft, Mandrake Linux Corporate Server 3.0
  • RedHat, Enterprise Linux 2.1 AS
  • RedHat, Enterprise Linux 2.1 WS
  • RedHat, Enterprise Linux 2.1 ES
  • RedHat, Enterprise Linux 3 Desktop
  • RedHat, Enterprise Linux 3 ES
  • RedHat, Enterprise Linux 3 AS
  • RedHat, Enterprise Linux 3 WS
  • RedHat, Enterprise Linux 4 WS
  • RedHat, Enterprise Linux 4 AS
  • RedHat, Enterprise Linux 4 Desktop
  • RedHat, Enterprise Linux 4 ES
  • RedHat, Linux Advanced Workstation 2.1 Itanium
  • Turbolinux, Turbolinux 10 Desktop
  • Turbolinux, Turbolinux 10 F...
  • Turbolinux, Turbolinux 10 Server
  • Turbolinux, Turbolinux 10 Server x64 Ed
  • 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

Remedy:

Upgrade to the latest version of Fetchmail (6.3.1 or later) or (6.2.5.5 or later), available from the Fetchmail Web site. See References.

For Debian GNU/Linux:
Refer to DSA-939-1 for patch, upgrade, or suggested workaround information. See References.

For Apple Mac OS X:
Apply Apple Security Update 2006-004, available from the Apple Web site. See References.

For Ubuntu Linux:
Refer to USN-233-1 for patch, upgrade, or suggested workaround information. See References.

For Red Hat Linux:
Refer to RHSA-2007:0018-10 for patch, upgrade, or suggested workaround information. See References.

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

Consequences:

Denial of Service

References:

Reported:

Dec 19, 2005

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 the author/distributor (IBM Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

For corrections or additions please email xforce@iss.net

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