[16869] in Kerberos-V5-bugs
[krbdev.mit.edu #9084] git commit
daemon@ATHENA.MIT.EDU (Greg Hudson via RT)
Tue Jan 24 03:03:07 2023
From: "Greg Hudson via RT" <rt-comment@krbdev.mit.edu>
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Tue Jan 24 03:03:01 2023: Request 9084 was acted upon.
Transaction: Ticket created by ghudson@mit.edu
Queue: krb5
Subject: git commit
Owner: ghudson@mit.edu
Requestors:
Status: new
Ticket <URL: https://krbdev.mit.edu/rt/Ticket/Display.html?id=9084 >
Add PAC full checksums
A paper by Tom Tervoort noted that computing the PAC privsvr checksum
over only the server checksum is vulnerable to collision attacks
(CVE-2022-37967). In response, Microsoft has added a second KDC
checksum over the full contents of the PAC. Generate and verify full
KDC checksums in PACs for service tickets. Update the t_pac.c ticket
test case to use a ticket issued by a recent version of Active
Directory (provided by Stefan Metzmacher).
https://github.com/krb5/krb5/commit/4602a10dbe380d75d1ec00f7d34479ac9d503735
Author: Greg Hudson <ghudson@mit.edu>
Commit: 4602a10dbe380d75d1ec00f7d34479ac9d503735
Branch: master
doc/appdev/refs/macros/index.rst | 1 +
src/include/krb5/krb5.hin | 1 +
src/lib/krb5/krb/pac.c | 92 +++++++++++----------
src/lib/krb5/krb/pac_sign.c | 146 +++++++++++++++++++--------------
src/lib/krb5/krb/t_pac.c | 171 +++++++++++++++++++++++----------------
src/tests/t_authdata.py | 4 +-
6 files changed, 240 insertions(+), 175 deletions(-)
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