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In each kadmind server stub, initialize the client_name and
server_name variables, and release them in the cleanup handler. Many
of the stubs will otherwise leak the client and server name if
krb5_unparse_name() fails. Also make sure to free the prime_arg
variables in rename_principal_2_svc(), or we can leak the first one if
unparsing the second one fails. Discovered by Simo Sorce.
CVE-2015-8631:
In all versions of MIT krb5, an authenticated attacker can cause
kadmind to leak memory by supplying a null principal name in a request
which uses one. Repeating these requests will eventually cause
kadmind to exhaust all available memory.
CVSSv2 Vector: AV:N/AC:L/Au:S/C:N/I:N/A:C/E:POC/RL:OF/RC:C
ticket: 8343 (new)
target_version: 1.14-next
target_version: 1.13-next
tags: pullup
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