Kerberos kadmind svcauth_gss_validate buffer overflow

kerberos-svcauthgssvalidate-bo (36437)

High Risk

Description:

Kerberos and applications implementing the Kerberos RPC library are vulnerable to a stack-based buffer overflow, caused by improper bounds checking by the svcauth_gss_validate function in the MIT krb5 Kerberos administration daemon (kadmind) RPC library. By sending a specially-crafted RPC authentication context message containing an overly long string, a remote attacker could overflow a buffer and cause the daemon to crash or execute arbitrary code on the system.

Platforms Affected:

• Apple, Mac OS X 10.4
• Apple, Mac OS X 10.4.1
• Apple, Mac OS X 10.4.10
• Apple, Mac OS X 10.4.2
• Apple, Mac OS X 10.4.3
• Apple, Mac OS X 10.4.4
• Apple, Mac OS X 10.4.5
• Apple, Mac OS X 10.4.6
• Apple, Mac OS X 10.4.7
• Apple, Mac OS X 10.4.8
• Apple, Mac OS X 10.4.9
• Apple, Mac OS X Server 10.4
• Apple, Mac OS X Server 10.4.1
• Apple, Mac OS X Server 10.4.10
• Apple, Mac OS X Server 10.4.2
• Apple, Mac OS X Server 10.4.3
• Apple, Mac OS X Server 10.4.4
• Apple, Mac OS X Server 10.4.5
• Apple, Mac OS X Server 10.4.6
• Apple, Mac OS X Server 10.4.7
• Apple, Mac OS X Server 10.4.8
• Apple, Mac OS X Server 10.4.9
• Avaya, Application Enablement Services 3.1.3
• Avaya, Intuity Audix LX
• Avaya, Message Networking
• Avaya, Message Storage Server 3.0
• Canonical, Ubuntu 6.06 LTS
• Canonical, Ubuntu 6.10
• Canonical, Ubuntu 7.04
• CITI, librpcsecgss prior to 0.15
• Debian, Debian Linux 4.0
• Gentoo, Linux
• MandrakeSoft, Mandrake Linux 2007 X86_64
• MandrakeSoft, Mandrake Linux 2007
• MandrakeSoft, Mandrake Linux 2007.1 X86_64
• MandrakeSoft, Mandrake Linux 2007.1
• MandrakeSoft, Mandrake Linux 2008.0 X86_64
• MandrakeSoft, Mandrake Linux Corporate Server 4.0
• MandrakeSoft, Mandrake Linux Corporate Server 4.0 X86_64
• MIT, Kerberos 5-1.4
• MIT, Kerberos 5-1.4.1
• MIT, Kerberos 5-1.4.2
• MIT, Kerberos 5-1.4.3
• MIT, Kerberos 5-1.4.4
• MIT, Kerberos 5-1.5
• MIT, Kerberos 5-1.5.1
• MIT, Kerberos 5-1.5.2
• MIT, Kerberos 5-1.5.3
• MIT, Kerberos 5-1.6
• MIT, Kerberos 5-1.6.1
• MIT, Kerberos 5-1.6.2
• RedHat, Enterprise Linux 4 Desktop
• RedHat, Enterprise Linux 4 ES
• RedHat, Enterprise Linux 4 WS
• RedHat, Enterprise Linux 4 AS
• RedHat, Enterprise Linux 5 Server
• RedHat, Enterprise Linux 5 Client Workstation
• RedHat, Enterprise Linux 5
• RedHat, Enterprise Linux 5 Client
• RedHat, Enterprise Linux Desktop 5.0
• Sun, Solaris 10 SPARC
• Sun, Solaris 10 x86
• Sun, Solaris 8.0 SPARC
• Sun, Solaris 8.0 x86
• Sun, Solaris 9.0 x86
• Sun, Solaris 9.0 SPARC
• SuSE, SuSE Linux

Remedy:

Refer to MIT krb5 Security Advisory 2007-006 for patch, upgrade, or suggested workaround information. See References.

For other distributions:
Apply the appropriate update for your system. See References.

Consequences:

Gain Access

References:

• Apple Web site, About the security content of Mac OS X 10.4.11 and Security Update 2007-008 at http://docs.info.apple.com/article.html?artnum=307041.
• BugTraq Mailing List, Tue Sep 04 2007 - 13:16:53 CDT, MITKRB5-SA-2007-006: kadmind RPC lib buffer overflow, uninitialized pointer at http://archives.neohapsis.com/archives/bugtraq/2007-09/0034.html.
• BugTraq Mailing List, Wed Sep 05 2007 - 15:47:11 CDT, updated patch: MITKRB5-SA-2007-006: kadmind RPC lib buffer overflow, uninitialized pointer at http://archives.neohapsis.com/archives/bugtraq/2007-09/0054.html.
• CITI Web site, CITI: Projects: NFS Version 4 Open Source Reference Implementation at http://www.citi.umich.edu/projects/nfsv4/linux/.
• Kerberos Web site, Kerberos: The Network Authentication Protocol at http://web.mit.edu/kerberos/www/.
• MIT krb5 Security Advisory 2007-006, kadmind RPC lib buffer overflow, uninitialized pointer at http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2007-006.txt.
• Sun Alert ID: 103060, Security Vulnerability in RPCSEC_GSS (rpcsec_gss(3NSL)) Affects Kerberos Administration Daemon (kadmind(1M)) at http://sunsolve.sun.com/search/document.do?assetkey=1-26-103060-1.
• ZDI-07-052, Multiple Kerberos Implementations Authentication Context Stack Overflow Vulnerability at http://www.zerodayinitiative.com/advisories/ZDI-07-052.html.
• ASA-2007-396: nfs-utils-lib security update (RHSA-2007-0913)
• BID-25534: MIT Kerberos 5 KAdminD Server SVCAuth_GSS_Validate Stack Buffer Overflow Vulnerability
• BID-26444: Apple Mac OS X v10.4.11 2007-008 Multiple Security Vulnerabilities
• CVE-2007-3999: Stack-based buffer overflow in the svcauth_gss_validate function in lib/rpc/svc_auth_gss.c in the RPCSEC_GSS RPC library (librpcsecgss) in MIT Kerberos 5 (krb5) 1.4 through 1.6.2, as used by the Kerberos administration daemon (kadmind) and some third-party applications that use krb5, allows remote attackers to cause a denial of service (daemon crash) and probably execute arbitrary code via a long string in an RPC message.
• CVE-2007-4743: The original patch for CVE-2007-3999 in svc_auth_gss.c in the RPCSEC_GSS RPC library in MIT Kerberos 5 (krb5) 1.4 through 1.6.2, as used by the Kerberos administration daemon (kadmind) and other applications that use krb5, does not correctly check the buffer length in some environments and architectures, which might allow remote attackers to conduct a buffer overflow attack.
• DSA-1367: krb5 -- buffer overflow
• DSA-1368: librpcsecgss -- buffer overflow
• DSA-1387: librpcsecgss -- buffer overflow
• FrSIRT/ADV-2007-3051: MIT Kerberos Multiple Remote Command Execution and DoS Vulnerabilities
• FrSIRT/ADV-2007-3052: librpcsecgss svcauth_gss_validate() Remote Code Execution Vulnerability
• FrSIRT/ADV-2007-3060: Sun Solaris Security Update Fixes Kerberos Command Execution Vulnerability
• FrSIRT/ADV-2007-3868: Apple Mac OS X Command Execution and Denial of Service Vulnerabilities
• FrSIRT/ADV-2008-0803: Libtirpc svcauth_gss_validate() Remote Code Execution Vulnerability
• GLSA-200709-01: MIT Kerberos 5: Multiple vulnerabilities
• GLSA-200710-01: RPCSEC_GSS library: Buffer overflow
• MDKSA-2007:174: Updated krb5 packages fix vulnerabilities
• MDKSA-2007:174-1: Updated krb5 packages fix vulnerabilities
• MDKSA-2007:181: Updated librpcsecgss packages fix vulnerabilities
• RHSA-2007-0858: Important: krb5 security update
• RHSA-2007-0892: Important: krb5 security update
• RHSA-2007-0913: Important: nfs-utils-lib security update
• RHSA-2007-0951: Important: nfs-utils-lib security update
• SA26676: Kerberos Multiple Vulnerabilities
• SA26705: librpcsecgss "svcauth_gss_validate()" Buffer Overflow
• SA26713: Sun Solaris Kerberos RPCSEC_GSS Vulnerability
• SA27146: Avaya Products nfs-utils-lib Denial of Service
• SA27643: Apple Mac OS X Security Update Fixes Multiple Vulnerabilities
• SA29247: libtirpc "svcauth_gss_validate()" Buffer Overflow
• SECTRACK ID: 1018647: Kerberos kadmind Stack Overflow and Uninitialized Pointer Lets Remote Users Execute Arbitrary Code
• SUSE-SR:2007:019: SUSE Security Summary Report
• SUSE-SR:2007:024: SUSE Security Summary Report
• US-CERT VU#883632: MIT Kerberos 5 kadmind buffer overflow vulnerability
• USN-511-1: Kerberos vulnerability
• USN-511-2: Kerberos vulnerability

Reported:

Sep 04, 2007

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