[18380] in bugtraq
Solaris mailx(1) lockfile bug
daemon@ATHENA.MIT.EDU (optyx)
Tue Jan 2 12:37:26 2001
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Message-ID: <Pine.BSO.4.21.0012301204210.25690-200000@pr0n.newhackcity.net>
Date: Sat, 30 Dec 2000 12:12:17 -0800
Reply-To: optyx <optyx@UBERHAX0R.NET>
From: optyx <optyx@UBERHAX0R.NET>
To: BUGTRAQ@SECURITYFOCUS.COM
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mailx(1) bug:
when mailx is run it creates a lockfile in /var/mail and links it
to /var/mail/username.lock
open("/var/mail/rootSxa4Mv", O_RDWR|O_CREAT|O_EXCL, 0600) = 4
link("/var/mail/rootSxa4Mv", "/var/mail/root.lock") = 0
if the file /var/mail/username.lock exists and it can delete the
file, mailx will hang for a while then exit, deleting the
/var/mail/username.lock file
if the file /var/mail/username.lock exists and cannot be deleted,
mailx will hang and not exit. the user can control-C out of
mailx.
an example shell script is attached. to fix this rm /var/mail/*.lock.
-Optyx, Uberhax0r Communications
http://www.uberhax0r.net - leeter than dog
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