Kerberos KDC krb5 UDP/TCP connection heap buffer overflow

kerberos-kdc-krb5-udp-tcp-bo (21328) The risk level is classified as HighHigh Risk

Description:

The MIT Kerberos Key Distribution Center (KDC) is vulnerable to a heap-based buffer overflow in the krb5 library. An unauthenticated remote attacker using a TCP or UDP connection could send a valid request to overflow a buffer and cause the application to crash or possibly execute arbitrary code on the system.

Note: It is reported that third-party application servers that use the MIT krb5 are also vulnerable to this vulnerability.

Platforms Affected:

  • Canonical, Ubuntu 4.10
  • Canonical, Ubuntu 5.04
  • Conectiva, Linux 10
  • Conectiva, Linux 9.0
  • Debian, Debian Linux 3.0
  • Debian, Debian Linux 3.1
  • Gentoo, Linux
  • IBM, OS 400
  • Joey, Dgen
  • MandrakeSoft, Mandrake Linux 10.0 AMD64
  • MandrakeSoft, Mandrake Linux 10.0
  • MandrakeSoft, Mandrake Linux 10.1 X86_64
  • MandrakeSoft, Mandrake Linux 10.1
  • MandrakeSoft, Mandrake Linux LE2005 X86_64
  • MandrakeSoft, Mandrake Linux LE2005
  • MandrakeSoft, Mandrake Linux Corporate Server 2.1
  • MandrakeSoft, Mandrake Linux Corporate Server 2.1 X86_64
  • MandrakeSoft, Mandrake Linux Corporate Server 3.0
  • MandrakeSoft, Mandrake Linux Corporate Server 3.0 X86_64
  • MandrakeSoft, Mandrake Multi Network Firewall 2.0
  • MIT, Kerberos 5-1.3
  • MIT, Kerberos 5-1.3.1
  • MIT, Kerberos 5-1.3.2
  • MIT, Kerberos 5-1.3.3
  • MIT, Kerberos 5-1.3.4
  • MIT, Kerberos 5-1.3.5
  • MIT, Kerberos 5-1.3.6
  • MIT, Kerberos 5-1.4
  • MIT, Kerberos 5-1.4.1
  • RedHat, Enterprise Linux 2.1 ES
  • RedHat, Enterprise Linux 2.1 WS
  • RedHat, Enterprise Linux 2.1 AS
  • RedHat, Enterprise Linux 3 Desktop
  • RedHat, Enterprise Linux 3 WS
  • RedHat, Enterprise Linux 3 ES
  • RedHat, Enterprise Linux 3 AS
  • RedHat, Enterprise Linux 4 AS
  • RedHat, Enterprise Linux 4 Desktop
  • RedHat, Enterprise Linux 4 ES
  • RedHat, Enterprise Linux 4 WS
  • RedHat, Linux Advanced Workstation 2.1 Itanium
  • Turbolinux, Turbolinux 10 Desktop
  • Turbolinux, Turbolinux 10 F...
  • Turbolinux, Turbolinux 10 Server
  • Turbolinux, Turbolinux 8 Server
  • Turbolinux, Turbolinux Home
  • Turbolinux, Turbolinux Appliance Server 1.0 Hosting Ed
  • Turbolinux, Turbolinux Appliance Server 1.0 Workgroup Ed

Remedy:

Upgrade to the latest version of MIT Kerberos 5 (krb5-1.4.2 or later), when it becomes available from the MIT Kerberos Web site. See References.

— OR —

Apply the patch for this vulnerability, as listed in MIT krb5 Security Advisory 2005-002. See References.

For Debian GNU/Linux 3.1 (Sarge):
Upgrade to the latest version of krb5 (1.3.6-2sarge2 or later), as listed in DSA-757-1. See References.

For Gentoo Linux:
Upgrade to the latest version of mit-krb5 (1.4.1-r1 or later), as listed in Gentoo Linux Security Announcement GLSA 200507-11. See References.

For Conectiva Linux 9.0 and 10.0:
Upgrade to the latest version of krb5 (1.4.2 or later) when it becomes available, as listed in Conectiva Linux Security Announcement CLSA-2005:993. See References.

For Red Hat Linux:
Refer to RHSA-2005:562-15 for patch, upgrade, or suggested workaround information. See References.

— OR —

Apply the patch for this vulnerability, as listed in MIT krb5 Security Advisory 2005-002. See References.

For Ubuntu Linux:
Refer to USN-224-1 for patch, upgrade, or suggested workaround information. See References.

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

Consequences:

Gain Access

References:

Reported:

Jul 12, 2005

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For corrections or additions please email xforce@iss.net

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