mit-krb5: Multiple buffer overflows in krb5_aname_to_localname
Gentoo Linux Security Advisory
||GLSA 200406-21 / mit-krb5
||June 29, 2004
||June 29, 2004: 01
All supported architectures
mit-krb5 contains multiple buffer overflows in the function
krb5_aname_to_localname(). This could potentially lead to a complete remote
mit-krb5 is the free implementation of the Kerberos network authentication
protocol by the Massachusetts Institute of Technology.
The library function krb5_aname_to_localname() contains multiple buffer
overflows. This is only exploitable if explicit mapping or rules-based
mapping is enabled. These are not enabled as default.
With explicit mapping enabled, an attacker must authenticate using a
principal name listed in the explicit mapping list.
With rules-based mapping enabled, an attacker must first be able to create
arbitrary principal names either in the local realm Kerberos realm or in a
remote realm from which the local realm's service are reachable by
An attacker could use these vulnerabilities to execute arbitrary code with
the permissions of the user running mit-krb5, which could be the root user.
There is no known workaround at this time. All users are encouraged to
upgrade to the latest available version.
mit-krb5 users should upgrade to the latest version:
Code Listing 3.1: Resolution
# emerge sync
# emerge -pv ">=app-crypt/mit-krb5-1.3.3-r1"
# emerge ">=app-crypt/mit-krb5-1.3.3-r1"