[krbdev.mit.edu #9099] git commit

[Greg Hudson via RT]

Wed Jul 05 14:44:17 2023: Request 9099 was acted upon.
 Transaction: Ticket created by ghudson at mit.edu
       Queue: krb5
     Subject: git commit
       Owner: ghudson at mit.edu
  Requestors: 
      Status: new
 Ticket <URL: https://krbdev.mit.edu/rt/Ticket/Display.html?id=9099 >



Ensure array count consistency in kadm5 RPC

In _xdr_kadm5_principal_ent_rec(), ensure that n_key_data matches the
key_data array count when decoding.  Otherwise when the structure is
later freed, xdr_array() could iterate over the wrong number of
elements, either leaking some memory or freeing uninitialized
pointers.  Reported by Robert Morris.

CVE-2023-36054:

An authenticated attacker can cause a kadmind process to crash by
freeing uninitialized pointers.  Remote code execution is unlikely.
An attacker with control of a kadmin server can cause a kadmin client
to crash by freeing uninitialized pointers.

https://github.com/krb5/krb5/commit/ef08b09c9459551aabbe7924fb176f1583053cdd
Author: Greg Hudson <ghudson at mit.edu>
Commit: ef08b09c9459551aabbe7924fb176f1583053cdd
Branch: master
 src/lib/kadm5/kadm_rpc_xdr.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)