GLSA-200507-11 : MIT Kerberos 5: Multiple vulnerabilities
High Nessus Plugin ID 18686
SynopsisThe remote Gentoo host is missing one or more security-related patches.
DescriptionThe remote host is affected by the vulnerability described in GLSA-200507-11 (MIT Kerberos 5: Multiple vulnerabilities)
Daniel Wachdorf discovered that MIT Kerberos 5 could corrupt the heap by freeing unallocated memory when receiving a special TCP request (CAN-2005-1174). He also discovered that the same request could lead to a single-byte heap overflow (CAN-2005-1175). Magnus Hagander discovered that krb5_recvauth() function of MIT Kerberos 5 might try to double-free memory (CAN-2005-1689).
Although exploitation is considered difficult, a remote attacker could exploit the single-byte heap overflow and the double-free vulnerability to execute arbitrary code, which could lead to the compromise of the whole Kerberos realm. A remote attacker could also use the heap corruption to cause a Denial of Service.
There are no known workarounds at this time.
SolutionAll MIT Kerberos 5 users should upgrade to the latest available version:
# emerge --sync # emerge --ask --oneshot --verbose '>=app-crypt/mit-krb5-1.4.1-r1'