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[Debian] Buffer Overflow in mtr - DSA 124-1



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Liebe Kolleginnen und Kollegen,
 
soeben erreichte uns nachfolgende Warnung des Debian Linux Teams ueber
Sicherheitsprobleme in mtr. Wir geben diese Informationen unveraendert
an Sie weiter.

Durch einen Buffer Overflow beim Parsen von Environment Variablen im
mtr Programm koennen lokale Angreifer Root-Rechte erlangen.
Zusaetzlich bekommen die Angreifer Zugang zum Raw-Socket des Programms
und koennen dies zum Faelschen von IP-Paketen nutzen.

Betroffen ist mtr in Versionen vor 0.41-6 (stable) bzw. 0.48-1
(unstable) in der Distribution Debian GNU/Linux 2.2 (potato).  Der
Hersteller stellt Patches zur Behebung der Sicherheitsluecken zur
Verfuegung.

(c) der deutschen Zusammenfassung bei DFN-CERT GmbH; die Verbreitung,
auch auszugsweise, ist nur unter Hinweis auf den Urheber, DFN-CERT
GmbH, und nur zu nicht kommerziellen Zwecken gestattet.

Mit freundlichen Gruessen,
                Klaus Moeller, DFN-CERT

- -- 
Klaus Moeller          |                      mailto:moeller@xxxxxxxxxxx
DFN-CERT GmbH          |            http://www.cert.dfn.de/team/moeller/
Oberstrasse 14b        |                        Phone: +49(40)808077-555
D-20144 Hamburg        |                          FAX: +49(40)808077-556
Germany                |         PGP-Key: finger moeller@xxxxxxxxxxxxxxx


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Hash: SHA1

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Debian Security Advisory DSA 124-1                     security@xxxxxxxxxx
http://www.debian.org/security/                             Martin Schulze
March 26th, 2002  
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Package        : mtr
Vulnerability  : buffer overflow
Problem-Type   : remote
Debian-specific: no

The authors of mtr released a new upstream version, noting a
non-exploitable buffer overflow in their ChangeLog.  Przemyslaw
Frasunek, however, found an easy way to exploit this bug, which allows
an attacker to gain access to the raw socket, which makes IP spoofing
and other malicious network activity possible.

The problem has been fixed by the Debian maintainer in version 0.41-6
for the stable distribution of Debian by backporting the upstream fix
and in version 0.48-1 for the testing/unstable distribution.

We recommend that you upgrade your mtr package immediately.

wget url
	will fetch the file for you
dpkg -i file.deb
        will install the referenced file.

If you are using the apt-get package manager, use the line for
sources.list as given below:

apt-get update
        will update the internal database
apt-get upgrade
        will install corrected packages

You may use an automated update by adding the resources from the
footer to the proper configuration.


Debian GNU/Linux 2.2 alias potato
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  Source archives:

    http://security.debian.org/dists/stable/updates/main/source/mtr_0.41.orig.tar.gz
      MD5 checksum: fd081c7c27fedfcf9de0dc04e632475b
    http://security.debian.org/dists/stable/updates/main/source/mtr_0.41-6.dsc
      MD5 checksum: f72f30e0c8e34b19affe5219bb901395
    http://security.debian.org/dists/stable/updates/main/source/mtr_0.41-6.diff.gz
      MD5 checksum: 4c7d03ec09a6d34e42464ba1ec2b0b7e

  Alpha architecture:

    http://security.debian.org/dists/stable/updates/main/binary-alpha/mtr_0.41-6_alpha.deb
      MD5 checksum: 2a18bd61d489d102010777527472bdee

  ARM architecture:

    http://security.debian.org/dists/stable/updates/main/binary-arm/mtr_0.41-6_arm.deb
      MD5 checksum: 557c34d502115cc45982aa731017a15c

  Intel ia32 architecture:

    http://security.debian.org/dists/stable/updates/main/binary-i386/mtr_0.41-6_i386.deb
      MD5 checksum: 4ba7815729e243669e8d825f5b8373a2

  Motorola 680x0 architecture:

    http://security.debian.org/dists/stable/updates/main/binary-m68k/mtr_0.41-6_m68k.deb
      MD5 checksum: c8341d67f1366d1840233a4046e1b083

  PowerPC architecture:

    http://security.debian.org/dists/stable/updates/main/binary-powerpc/mtr_0.41-6_powerpc.deb
      MD5 checksum: 925a23ad8f07c0893c0493b06575fa80

  Sun Sparc architecture:

    http://security.debian.org/dists/stable/updates/main/binary-sparc/mtr_0.41-6_sparc.deb
      MD5 checksum: fd9f0dcc4566dee2e684342233673dd2


  These files will probably be moved into the stable distribution on
  its next revision.

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For apt-get: deb http://security.debian.org/ stable/updates main
For dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main
Mailing list: debian-security-announce@xxxxxxxxxxxxxxxx
Package info: `apt-cache show <pkg>' and http://packages.debian.org/<pkg>

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