Kerberos KDC krb5_recvauth code execution

kerberos-kdc-krb5recvauth-execute-code (21055)

High Risk

Description:

The MIT Kerberos Key Distribution Center (KDC) could allow an unauthenticated remote attacker to execute arbitrary code on the system, caused by a double free vulnerability in the krb5_recvauth() function. An attacker could exploit this vulnerability using unspecified attack vectors to execute arbitrary code with the privileges of the application calling the krb5_recvauth() function. This vulnerability could be leveraged to compromise the entire Kerberos realm.

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
• 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
• MandrakeSoft, Mandrake Linux LE2005 X86_64
• MandrakeSoft, Mandrake Linux Corporate Server 2.1 X86_64
• MandrakeSoft, Mandrake Linux Corporate Server 2.1
• MandrakeSoft, Mandrake Linux Corporate Server 3.0 X86_64
• MandrakeSoft, Mandrake Linux Corporate Server 3.0
• 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 WS
• RedHat, Enterprise Linux 3 ES
• RedHat, Enterprise Linux 3 AS
• RedHat, Enterprise Linux 3 Desktop
• RedHat, Enterprise Linux 4 Desktop
• RedHat, Enterprise Linux 4 WS
• RedHat, Enterprise Linux 4 ES
• RedHat, Enterprise Linux 4 AS
• 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 (krb5-1.2.7 or later), as listed in MIT krb5 Security Advisory 2005-003. 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-krb (5-1.4.1-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:

• CIAC INFORMATION BULLETIN P-249, krb5 Security Update at http://www.ciac.org/ciac/bulletins/p-249.shtml.
• CIAC Information Bulletin P-276, Apple Security Update 2005-007 at http://www.ciac.org/ciac/bulletins/p-276.shtml.
• Conectiva Linux Security Announcement CLSA-2005:993, Fix for security vulnerabilities in Kerberos 5 at http://distro.conectiva.com/atualizacoes/index.php?id=a&anuncio=000993.
• MIT krb5 Security Advisory 2005-002, buffer overflow, heap corruption in KDC at http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2005-002-kdc.txt.
• MIT krb5 Security Advisory 2005-003, double-free in krb5_recvauth at http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2005-003-recvauth.txt.
• BID-14239: MIT Kerberos 5 KRB5_Recvauth Remote Pre-Authentication Double-Free Vulnerability
• BID-14567: Apple Mac OS X Multiple Vulnerabilities
• CVE-2005-1689: Double free vulnerability in the krb5_recvauth function in MIT Kerberos 5 (krb5) 1.4.1 and earlier allows remote attackers to execute arbitrary code via certain error conditions.
• DSA-757: krb5 -- buffer overflow
• GLSA-200507-11: MIT Kerberos 5: Multiple vulnerabilities
• MDKSA-2005:119: Updated krb5 packages fix multiple vulnerabilities
• RHSA-2005-562: krb5 security update
• RHSA-2005-567: krb5 security update
• SA16041: Kerberos V5 Multiple Vulnerabilities
• SECTRACK ID: 1014461: Kerberos krb5_recvauth() Double-Free Error May Let Remote Users Execute Arbitrary Code
• SUSE-SR:2005:017: SUSE Security Summary Report

Reported:

Jul 12, 2005

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