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Merge unix-chkpwd: Add read capability to profile

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Following the Security Technical Implementation Guide, it is better to
set the permissions to 0000 for the shadow file.
However, since PAM version 1.6.0, after this change [0], unix-chkpwd
will unconditionnaly read the shadow file. And with the previous
restriction, the binary has an access denied to the shadow which
blocks user authentications. Moreover the PAM changes is needed to fix
the CVE-2024-10041.
Giving the read caability to the unix-chkpwd profile allows it to
function properly. See bug report [1].

[0] - https://github.com/linux-pam/linux-pam/pull/686
[1] - https://bugzilla.suse.com/show_bug.cgi?id=1241678

Signed-off-by: vlefebvre <valentin.lefebvre@suse.com>

MR: https://gitlab.com/apparmor/apparmor/-/merge_requests/1685
Approved-by: John Johansen <john@jjmx.net>
Merged-by: John Johansen <john@jjmx.net>
This commit is contained in:
John Johansen 2025-05-13 16:00:21 +00:00
commit 84c3e629e4
1 changed files with 2 additions and 0 deletions
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profiles/apparmor.d/unix-chkpwd
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@ -17,6 +17,8 @@ profile unix-chkpwd /{,usr/}{,s}bin/unix_chkpwd {
# To write records to the kernel auditing log.
capability audit_write,
# To read shadow with 000 permissions.
capability dac_read_search,
network netlink raw,