Vulnerability Assessment & Network Security Forums

If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important.  If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery.

Home >> Browse Vulnerability Assessment Database >> Debian Local Security Checks >> [DSA042] DSA-042-1 gnuserv

Vulnerability Assessment Details

[DSA042] DSA-042-1 gnuserv

Vulnerability Assessment Summary
DSA-042-1 gnuserv

Detailed Explanation for this Vulnerability Assessment
Klaus Frank has found a vulnerability in the way gnuserv
handled remote connections. Gnuserv is a remote control facility for Emacsen
which is available as standalone program as well as included in XEmacs21.
Gnuserv has a buffer for which insufficient boundary checks were made.
Unfortunately this buffer affected access control to gnuserv which is using a
MIT-MAGIC-COOCKIE based system. It is possible to overflow the buffer
containing the cookie and foozle cookie comparison.

Gnuserv was derived from emacsserver which is part of GNU Emacs. It was
reworked completely and not much is left over from its time as part of
GNU Emacs. Therefore the versions of emacsserver in both Emacs19 and Emacs20
doesn't look vulnerable to this bug, they don't even provide a MIT-MAGIC-COOKIE
based mechanism.

This could lead into a remote user issue commands under the UID of the
person running gnuserv.

Solution :
Network Security Threat Level: High

Networks Security ID: 2333

Vulnerability Assessment Copyright: This script is (C) 2005 Michel Arboi

Cables, Connectors

P4Dual- 915GL Micro ATX motherboard+CPU 3,8Ghz
P4Dual- 915GL  Micro ATX motherboard+CPU 3,8Ghz pictureIBM Personal Communications 3270 V3.1 Vintage 3.5" Disks *New Sealed*
IBM Personal Communications 3270 V3.1 Vintage 3.5Apple MacBook Air Motherboard 13" Mid-2012 i7-3667U 2.0GHz 21PJ7MB00C0 8GB A1466
Apple MacBook Air Motherboard 13MacBook Pro 15" Retina Right I/O Board, Late 2013 - NM19 11A NYKS 94V-0
MacBook Pro 15


No Discussions have been posted on this vulnerability.