Free and open-source vulnerability scanner
Mageni eases for you the vulnerability scanning, assessment, and management process. It is free and open-source.
Install NowAvailable for macOS, Windows, and Linux
Debian Security Advisory DSA 042-1 (gnuserv, xemacs21)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
The remote host is missing an update to gnuserv, xemacs21 announced via advisory DSA 042-1.
Insight
Insight
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's was reworked completely and not much is to be left over from its time as part of GNU Emacs. Therefore the versions of emacssserver 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. We recommend you upgrade your xemacs21 and gnuserv packages immediately.
Solution
Solution
https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20042-1