Security Linux News for Nov 22, 2000
Red Hat Security Advisory: ghostscript uses mktemp instead of mkstemp, and uses an improper LD_RUN_PATH (Nov 22, 2000, 22:12)
"ghostscript makes use of mktemp instead of mkstemp to create
temp files; and also uses improper LD_RUN_PATH values, causing it
to search for libraries in the current directory."
O'Reilly Network: Insecurities in a Nutshell: Vixie cron Exploit and More (Nov 22, 2000, 21:42)
"An exploit was announced that uses fopen() and a preserved
umask vulnerability in Paul Vixie's cron. An attacker can use this
vulnerability to create a world-writable file in /var/spool/cron.
They would then be able to write arbitrary cron entries into that
file, which would run as the user being attacked. It is reported
that Mandrake 7.0, Red Hat versions 6.1 and earlier, Cobalt Linux,
and Trustix are not vulnerable."
Debian Security Advisory: New version of modutils released (Nov 22, 2000, 21:27)
"Sebastian Krahmer raised an issue in modutils. In an ideal
world modprobe should trust the kernel to only pass valid
parameters to modprobe. However he has found at least one local
root exploit because high level kernel code passed unverified
parameters direct from the user to modprobe. So modprobe no longer
trusts kernel input and switches to a safemode."
Debian Security Advisory: New version of elvis-tiny released (Nov 22, 2000, 21:15)
"Topi Miettinen audited elvis-tiny and raised an issue covering
the use and creation of temporary files. Those files are created
with a predictable pattern and O_EXCL flag is not used when
opening. This makes users of elvis-tiny vulnerable to race
conditions and/or data lossage."
Debian Security Advisory: New Debian xmcd packages released (Nov 22, 2000, 20:48)
"The Debian GNU/Linux xmcd package has historically installed
two setuid helpers for accessing cddb databases and SCSI cdrom
drives. More recently, the package offered the administrator the
chance to remove these setuid flags, but did so incorrectly."
Debian Security Advisory: New Debian ncurses packages released (Nov 22, 2000, 20:41)
"The version of the ncurses display library shipped with Debian
GNU/Linux 2.2 is vulnerable to several buffer overflows in the
parsing of terminfo database files."
Debian Security Advisory: New version of ethereal released
(Nov 22, 2000, 07:31)
hacksware reported a buffer overflow in the AFS packet parsing
code in ethereal. Gerald Combs then found more overflows in the
netbios and ntp decoding logic as well. An attacker can exploit
those overflows by sending carefully crafted packets to a network
that is being monitored by ethereal.
Debian Security Advisory: New version of joe released
(Nov 22, 2000, 07:25)
When joe (Joe's Own Editor) dies due to a signal instead of a
normal exit it saves a list of the files it is editing to a file
called `DEADJOE' in its current directory. Unfortunately this
wasn't done safely which made joe vulnerable to a symlink
Debian Security Advisory: New version of modutils released (Nov 20, 2000, 20:20)
"The kmod kernel feature allows the kernel to dynamically load
kernel modules if functionality is required that is not present in
the running kernel. It does this by invoking the modprobe command
with the requested module as parameter. This parameter can be
influenced by users, for example by opening a currently
non-existing files on a devfs filesystem, or trying to access a
non-existing network interface."