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From: zillion (zillionsnosoft.com)
Date: Fri May 31 2002 - 13:59:41 CDT
Strategic Reconnaissance Team Security Advisory (SRT2002-04-31-1159)
Topic : Mnews local and remote overflow vulnerabilities
Date : May 31, 2002
Credit : zillion[at]safemode.org
Site : http://www.snosoft.com
Mnews is a small console based email and news client which is often
installed setgid mail. Several local and remote overflows have been
identified in this package.
Local overflows where found in the -f, -n, -D, -M, -P parameters and
in the JNAMES, MAILSERVER environment variables. The remote overflow
resides in the code responsible for processing responses received from
the NNTP server. For example the following response will result in an
200 <a x 770>
If you look at the source code of mnews you will see that this package
is very outdated and dangerous to use on todays Internet.
Local users might be able to elevate their privileges on the affected
systems. Remote malicious server owners can use mnews to penetrate an
We strongly recommend to stop using mnews.
.: Systems Affected:
Systems running the mnews package version 1.22 are affected. It is
very likely that older versions are also affected.
.: Proof of Concept:
A working exploit that illustrates the danger of this package will
be released soon.