[16859] in Kerberos-V5-bugs
[krbdev.mit.edu #9073] git commit
daemon@ATHENA.MIT.EDU (Greg Hudson via RT)
Tue Nov 15 11:32:46 2022
From: "Greg Hudson via RT" <rt@krbdev.mit.edu>
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<URL: https://krbdev.mit.edu/rt/Ticket/Display.html?id=9073 >
Fix null deref in KDC when decoding invalid NDR
In ndr_dec_delegation_info(), keep di->transited_services_length valid
by incrementing it as we add entries. Otherwise
ndr_free_delegation_info() could dereference a null
di->transited_services field. Also bound nservices using data->length
to prevent inordinately large memory allocations. Credit to OSS-Fuzz
for discovering the issues.
(cherry picked from commit fa62bd33a0c0889c083999c0289ffa81a5d51e7b)
https://github.com/krb5/krb5/commit/fdf193f188005c8ed4cb27558425052b673f89a1
Author: Greg Hudson <ghudson@mit.edu>
Commit: fdf193f188005c8ed4cb27558425052b673f89a1
Branch: krb5-1.20
src/kdc/ndr.c | 14 +++++++-------
src/kdc/t_ndr.c | 32 +++++++++++++++++++++++++++++---
2 files changed, 36 insertions(+), 10 deletions(-)
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