MIT Kerberos process_tgs_req() denial of service
|kerberos-processtgsreq-dos (71655)||Medium Risk|
MIT Kerberos is vulnerable to a denial of service, caused by a NULL pointer dereference in the process_tgs_req() function. By sending a specially-crafted TGS request, a remote attacker could exploit this vulnerability to cause the KDC daemon to crash.
Denial of Service
Refer to MITKRB5-SA-2011-007 for patch, upgrade or suggested workaround information. See References.
- MITKRB5-SA-2011-007: KDC null pointer dereference in TGS handling.
- BID-50929: MIT Kerberos KDC TGS Handling NULL Pointer Dereference Denial Of Service Vulnerability
- CVE-2011-1530: The process_tgs_req function in do_tgs_req.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.9 through 1.9.2 allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted TGS request that triggers an error other than the KRB5_KDB_NOENTRY error.
- OSVDB ID: 77572: MIT Kerberos 5 src/kdc/do_tgs_req.c process_tgs_req() Function TGS Request Parsing Remote DoS
- RHSA-2011-1790: Moderate: krb5 security update
- SA47124: Kerberos KDC "process_tgs_req()" NULL Pointer Dereference Denial of Service Vulnerability
- 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 5-1.3
- MIT Kerberos 5-1.4
- MIT Kerberos 5-1.5
- MIT Kerberos 5-1.6
- MIT Kerberos 5-1.7
- MIT Kerberos 5-1.8
- MIT Kerberos 5-1.8.4
- MIT Kerberos 5-1.9
- RedHat Enterprise Linux 6 Server
- RedHat Enterprise Linux 6 Workstation
- RedHat Enterprise Linux Desktop 6
- RedHat Enterprise Linux HPC Node 6
Dec 06, 2011
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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.