Vulnerabilities have been discovered in Kerberos V5, which can be exploited by malicious users to compromise a vulnerable system.
The vulnerabilities are caused due to boundary errors within the "krb5_aname_to_localname()" library function during conversion of Kerberos principal names into local account names. These can be exploited to cause heap-based buffer overflows by passing an overly long principal name when authenticating.
Exploitation may allow execution of arbitrary code on a vulnerable system with root privileges. However, this requires successful authentication to a vulnerable service, and the explicit mapping or rules-based mapping functionality has been enabled (not default configuration).
The vulnerabilities affect version 1.3.3 and prior.
Solution: Disable the affected functionality or apply patch:
Do you have additional information related to this advisory?
Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this
information to email@example.com