MIT Kerberos 5 (krb5) asn1_decode_generaltime() function denial of service

kerberos-asn1decodegeneraltime-dos (49749) The risk level is classified as MediumMedium Risk

Description:

MIT Kerberos 5 (krb5) is vulnerable to a denial of service, caused by an error in the ASN.1 GeneralizedTime decoder asn1_decode_generaltime() function. A remote attacker could exploit this vulnerability using vectors related to invalid DER encoding that triggers a free of an uninitialized pointer to cause a denial of service.

*CVSS:

Base Score: 10
  Access Vector: Network
  Access Complexity: Low
  Authentication: None
  Confidentiality Impact: Complete
  Integrity Impact: Complete
  Availability Impact: Complete
 
Temporal Score: 7.4
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Denial of Service

Remedy:

For Apple Mac OS:
Apply Apple Security Update 2009-002, available from the Apple Web site. See References.

Refer to MITKRB5-SA-2009-002 for patch, upgrade or suggested workaround information. See References.

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

References:

  • Apple Web site: About the security content of Security Update 2009-002 / Mac OS X v10.5.7.
  • MITKRB5-SA-2009-001: multiple vulnerabilities in SPNEGO, ASN.1 decoder.
  • MITKRB5-SA-2009-002: ASN.1 decoder frees uninitialized pointer.
  • Novell Document ID: 5047181: NKDC 20090409.
  • Sun Alert ID: 256728: Multiple Security Vulnerabilities in the Solaris Kerberos 'Mech' Libraries May Lead To Execution of Arbitrary Code, Unauthorized Access to Data or a Denial of Service (DoS) Condition.
  • ASA-2009-162: krb5 security update (RHSA-2009-0409)
  • ASA-2009-164: krb5 security update (RHSA-2009-0410)
  • BID-34409: MIT Kerberos 'asn1_decode_generaltime()' Uninitialized Pointer Memory Corruption Vulnerability
  • CVE-2009-0846: The asn1_decode_generaltime function in lib/krb5/asn.1/asn1_decode.c in the ASN.1 GeneralizedTime decoder in MIT Kerberos 5 (aka krb5) before 1.6.4 allows remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary code via vectors involving an invalid DER encoding that triggers a free of an uninitialized pointer.
  • DSA-1766: krb5 -- several vulnerabilities
  • GLSA-200904-09: MIT Kerberos 5: Multiple vulnerabilities
  • MDVSA-2009:098: krb5
  • MDVSA-2009:098-1: krb5
  • MDVSA-2010:005: krb5
  • RHSA-2009-0408: Important: krb5 security update
  • RHSA-2009-0409: Important: krb5 security update
  • RHSA-2009-0410: Critical: krb5 security update
  • SA34347: Kerberos "spnego_gss_accept_sec_context()" Denial of Service
  • SA34640: Sun Solaris / SEAM Kerberos Multiple Vulnerabilities
  • SA34734: Novell Kerberos KDC Multiple Vulnerabilities
  • SA35074: Apple Mac OS X Security Update Fixes Multiple Vulnerabilities
  • SECTRACK ID: 1021994: Kerberos ASN.1 GeneralizedTime Decoder Bug Lets Remote Users Execute Arbitrary Code
  • SUSE-SA:2009:019: krb5 security problems
  • USN-755-1: Kerberos vulnerabilities
  • VUPEN/ADV-2009-0960: Kerberos Remote Code Execution and Denial of Service Vulnerabilities
  • VUPEN/ADV-2009-0976: Sun Solaris and SEAM Kerberos Code Execution and DoS Vulnerabilities
  • VUPEN/ADV-2009-1057: Novell Kerberos KDC Code Execution and Denial of Service Vulnerabilities
  • VUPEN/ADV-2009-1106: Avaya CMS Solaris Kerberos Code Execution and DoS Vulnerabilities
  • VUPEN/ADV-2009-1297: Apple Mac OS X Code Execution and Security Bypass Vulnerabilities
  • VUPEN/ADV-2009-2084: HP-UX Kerberos Code Execution and Denial of Service Vulnerabilities
  • VUPEN/ADV-2009-2248: IBM Network Authentication Service for DB2 Multiple Vulnerabilities

Platforms Affected:

  • Apple Mac OS X 10.4.11
  • Apple Mac OS X 10.5
  • Apple Mac OS X 10.5.1
  • Apple Mac OS X 10.5.2
  • Apple Mac OS X 10.5.3
  • Apple Mac OS X 10.5.4
  • Apple Mac OS X 10.5.5
  • Apple Mac OS X 10.5.6
  • Apple Mac OS X Server 10.4.11
  • Apple Mac OS X Server 10.5
  • Apple Mac OS X Server 10.5.1
  • Apple Mac OS X Server 10.5.2
  • Apple Mac OS X Server 10.5.3
  • Apple Mac OS X Server 10.5.4
  • Apple Mac OS X Server 10.5.5
  • Apple Mac OS X Server 10.5.6
  • Canonical Ubuntu 6.06 LTS
  • Canonical Ubuntu 7.10
  • Canonical Ubuntu 8.04 LTS
  • Canonical Ubuntu 8.10
  • Debian Debian Linux 4.0
  • Debian Debian Linux 5.0
  • Gentoo Linux
  • MandrakeSoft Mandrake Linux 2008.0
  • MandrakeSoft Mandrake Linux 2008.0 X86_64
  • MandrakeSoft Mandrake Linux 2008.1
  • MandrakeSoft Mandrake Linux 2008.1 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 X86_64
  • MandrakeSoft Mandrake Linux Corporate Server 4.0
  • MandrakeSoft Mandrake Multi Network Firewall 2.0
  • Mandriva Linux 2009.0
  • Mandriva Linux 2009.0 X86_64
  • MIT Kerberos 5
  • MIT Kerberos 5 1.0
  • MIT Kerberos 5 1.0.6
  • MIT Kerberos 5 1.1
  • MIT Kerberos 5 1.1.1
  • MIT Kerberos 5 1.2 Beta1
  • MIT Kerberos 5 1.2 Beta2
  • MIT Kerberos 5 1.3.3
  • MIT Kerberos 5-1.1
  • MIT Kerberos 5-1.2
  • MIT Kerberos 5-1.2.1
  • MIT Kerberos 5-1.2.2
  • MIT Kerberos 5-1.2.3
  • MIT Kerberos 5-1.2.4
  • MIT Kerberos 5-1.2.5
  • MIT Kerberos 5-1.2.6
  • MIT Kerberos 5-1.2.7
  • MIT Kerberos 5-1.2.8
  • MIT Kerberos 5-1.3
  • MIT Kerberos 5-1.3 Alpha1
  • 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
  • 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
  • MIT Kerberos 5-1.6.3
  • Novell Open Enterprise Server 2 AMD64
  • Novell Open Enterprise Server 2 x86
  • Novell Open Enterprise Server 2 Intel EM64T
  • Novell OpenSUSE 10.3
  • Novell OpenSUSE 11.0
  • Novell SLE SDK 10 SP2
  • Novell SUSE Linux Enterprise 10 SP2 DEBUGINFO
  • Novell SUSE Linux Enterprise Desktop 10 SP2
  • Novell SUSE Linux Enterprise Server 10 SP2
  • RedHat Enterprise Linux 2.1 AS
  • RedHat Enterprise Linux 2.1 ES
  • RedHat Enterprise Linux 2.1 WS
  • RedHat Enterprise Linux 3 WS
  • RedHat Enterprise Linux 3 ES
  • RedHat Enterprise Linux 3 AS
  • RedHat Enterprise Linux 3 Desktop
  • RedHat Enterprise Linux 4 AS
  • RedHat Enterprise Linux 4 WS
  • RedHat Enterprise Linux 4 ES
  • RedHat Enterprise Linux 4 Desktop
  • RedHat Enterprise Linux 4.7.z AS
  • RedHat Enterprise Linux 5
  • RedHat Enterprise Linux 5 Client
  • RedHat Enterprise Linux 5 Client Workstation
  • RedHat Enterprise Linux 5.3.z EUS
  • RedHat Enterprise Linux Long Life 5.3
  • RedHat Linux Advanced Workstation 2.1 Itanium
  • RedHat Red Hat Enterprise Linux 4.7.z ES
  • Sun OpenSolaris
  • Sun SEAM 1.0.1
  • Sun SEAM 1.0.1 Supplemental
  • Sun Solaris 10 SPARC
  • Sun Solaris 10 x86
  • Sun Solaris 8 SPARC
  • Sun Solaris 8 x86
  • Sun Solaris 9 SPARC
  • Sun Solaris 9 x86

Reported:

Apr 07, 2009

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 ignore thisxforceignore this@ignore thisus.ignore thisibm.comignore this

Return to the main page

* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
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.

About IBM Internet Security Systems

IBM Internet Security Systems is a trusted security advisor to thousands of the world's leading businesses and governments, helping to provide pre-emptive protection for networks, desktops and servers. The IBM Proventia? integrated security platform is designed to automatically protect against both known and unknown threats, helping to keep networks up and running and shield customers from online attacks before they impact business assets. IBM Internet Security Systems products and services are based on the proactive security intelligence of its X-Force? research and development team ? an unequivocal world authority in vulnerability and threat research. The IBM Internet Security Systems product line is also complemented by comprehensive Managed Security Services and Professional Security Services. For more information, visit the IBM Internet Security Systems Web site at www.iss.net or call 800-776-2362.