*** This bug is a duplicate of bug 2060676 ***
https://bugs.launchpad.net/bugs/2060676
I regard it as a bug ("lastlog" is affected).
We are on Ubuntu 20.04 LTS and evaluating upgrading to 24.04 LTS, but want to
keep "lastlog".
When could "lastlog" be re-instated?
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https://bugs.launchpad.net/bugs/2063257
Title:
Noble: default pam config for login tries do load non-existent
pam_lastlog.so
Status in shadow package in Ubuntu:
Confirmed
Status in shadow source package in Noble:
Confirmed
Status in shadow package in Debian:
New
Bug description:
pam_lastlog.so was dropped by upstream in 1.5.3[1][4]. It's still
there in the code, but not built by default.
And indeed, in noble (1.5.3) we don't have it, while mantic (1.5.2)
does.
This does not prevent console logins, but generates an error in the logs:
Apr 23 20:02:09 n1 login[835]: PAM unable to dlopen(pam_lastlog.so):
/usr/lib/security/pam_lastlog.so: cannot open shared object file: No such file
or directory
Apr 23 20:02:09 n1 login[835]: PAM adding faulty module: pam_lastlog.so
Debian's shadow package is also still shipping this config[2].
If you think we should re-enable pam_lastlog, then this becomes a bug
in the src:pam package, but keep in mind upstream is keen on removing
it, and we might be better off switching to an alternative, perhaps
pam_lastlog2[3].
1.
https://github.com/linux-pam/linux-pam/blob/cec36a8cd2c69cc87eacc21da471334fbef128ee/NEWS#L65
2.
https://salsa.debian.org/debian/shadow/-/blob/master/debian/login.pam?ref_type=heads#L82
3. https://wiki.debian.org/PamLastlog2
4.
https://github.com/linux-pam/linux-pam/commit/357a4ddbe9b4b10ebd805d2af3e32f3ead5b8816
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