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List Archive: gentoo-ppc-dev
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To: gentoo-security@g.o
From: Daniel Ahlberg <aliz@g.o>
Subject: GLSA: mpack
Date: Fri Aug 2 07:11:04 2002
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Hash: SHA1

- - --------------------------------------------------------------------
GENTOO LINUX SECURITY ANNOUNCEMENT
- - --------------------------------------------------------------------

PACKAGE        :mpack
SUMMARY        :remote buffer overflow
DATE           :2002-08-02 12:15 UTC

- - --------------------------------------------------------------------

OVERVIEW

A buffer overflow in the munpack program causes the program to crash
and might also be used to run arbitary code.

There also exist a second vulnerability that affects malformed
filenams.

DETAIL

- From Debian Security Advisory DSA 141-1:

Eckehard Berns discovered a buffer overflow in the munpack program
which is used for decoding (respectively) binary files in MIME
(Multipurpose Internet Mail Extensions) format mail messages.  If
munpack is run on an appropriately malformed email (or news article)
then it will crash, and perhaps can be made to run arbitrary code.

Herbert Xu reported a second vulnerability which affected malformed
filenames that refer to files in upper directories like "../a".  The
security impact is limited, though, because only a single leading
"../" was accepted and only new files can be created (i.e. no files
will be overwritten).

The full Debian Security Advisory can be read at
http://security.debian.org
NOTE: The DSA was not uploaded at the time when this
advisory was written.

SOLUTION

It is recommended that all Gentoo Linux users update their systems as
follows.

emerge rsync
emerge mpack
emerge clean

- - --------------------------------------------------------------------
Daniel Ahlberg
aliz@g.o
- - --------------------------------------------------------------------
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