3.0pl1-124.1ubuntu1 contains a fix for this.
** Changed in: cron (Ubuntu)
Status: Confirmed => Fix Committed
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https://bugs.launchpad.net/bugs/1067779
Title:
missing pam_loginuid.so breaks getlogin()
Status in “at” package in Ubuntu:
Fix Committed
Status in “cron” package in Ubuntu:
Fix Committed
Status in “openssh” package in Ubuntu:
Fix Released
Status in “shadow” package in Ubuntu:
Confirmed
Status in “at” package in Debian:
Fix Released
Status in “cron” package in Debian:
Fix Released
Status in “openssh” package in Debian:
Fix Released
Status in “shadow” package in Debian:
Fix Released
Bug description:
getlogin() call in new glibc checks /proc/self/loginuid presence and
trust its value as most safe source (due it's audit-related nature).
But default /etc/pam.d/common-account doesn't contains entry to
pam_loginuid.so which modify /proc/self/loginuid properly. This breaks
getlogin() at many scenarios like this:
(pam session without pam_loginuid)$ perl -e '$t=getlogin; print "$t\n";'
root
(pam session without pam_loginuid)$ id
uid=1000(...
just because /proc/self/loginuid contains '0' value
If I add pam_loginuid.so to /etc/pam.d/common-account like
http://manpages.ubuntu.com/manpages/precise/man8/pam_loginuid.8.html
recommend, everything worked as expected:
(pam session with pam_loginuid)$ perl -e '$t=getlogin; print "$t\n";'
user
(pam session with pam_loginuid)$ id
uid=1000(...
# cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=12.04
DISTRIB_CODENAME=precise
DISTRIB_DESCRIPTION="Ubuntu 12.04 LTS"
# dpkg -l|fgrep libpam
ii libpam-ck-connector 0.4.5-2
ConsoleKit PAM module
ii libpam-modules 1.1.3-7ubuntu2
Pluggable Authentication Modules for PAM
ii libpam-modules-bin 1.1.3-7ubuntu2
Pluggable Authentication Modules for PAM - helper binaries
ii libpam-runtime 1.1.3-7ubuntu2
Runtime support for the PAM library
ii libpam0g 1.1.3-7ubuntu2
Pluggable Authentication Modules library
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