[17234] in Kerberos-V5-bugs
[krbdev.mit.edu #9245] git commit
daemon@ATHENA.MIT.EDU (Greg Hudson via RT)
Mon Nov 9 12:02:40 2026
From: "Greg Hudson via RT" <rt@krbdev.mit.edu>
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Date: Mon, 09 Nov 2026 12:02:37 -0500
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<URL: https://krbdev.mit.edu/rt/Ticket/Display.html?id=9245 >
Move krb5.ini from ProgramData to Program Files
On Windows, ProgramData (aka CSIDL_COMMON_APPDATA) by default has
permissions allowing any user to create files and directories, and
modify files and directories they have created, similar to /tmp on
UNIX-like systems. This permission model is not suited for krb5.ini,
because the installer cannot reasonably determine whether a
pre-existing krb5.ini (or its containing subdirectories) was placed
there by a previous installation or was pre-created with malicious
contents by an unprivileged user.
Change the default per-machine location for krb5.ini to
%ProgramFiles%\MIT\Kerberos5. This default applies if the filename
is not configured in the registry and no krb5.ini file exists under
%AppData% for the current user.
Discovered by Aisle Research.
(cherry picked from commit 55302e26b4db994c6438cd2899562dd9b8ac195c)
https://github.com/krb5/krb5/commit/cfe83fa6c69c4c0b824f83cb3e77ffef7d9379c1
Author: Greg Hudson <ghudson@mit.edu>
Commit: cfe83fa6c69c4c0b824f83cb3e77ffef7d9379c1
Branch: krb5-1.22
src/lib/krb5/os/init_os_ctx.c | 8 +++++---
src/windows/README | 13 ++++++-------
src/windows/installer/wix/files.wxi | 13 +++----------
3 files changed, 14 insertions(+), 20 deletions(-)
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