[Debian] Schwachstelle im tar Kommando - DSA 987-1

win-sec-ssc at dfn-cert.de win-sec-ssc at dfn-cert.de
Die Mar 7 16:40:02 CET 2006


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Liebe Kolleginnen und Kollegen,

soeben erreichte uns nachfolgende Warnung des Debian-Teams. Wir geben
diese Informationen unveraendert an Sie weiter.

POSIX Access Control Lists ermoeglichen eine sehr feine Rechtevergabe
innerhalb von Unix Dateisystemen. Im Rahmen von POSIX.1 wird das PAX
(Portable Archive eXchange) Archiv Format definiert, in dem POSIX ACLs
gespeichert werden koennen.

CAN-2006-0300 - Buffer Overflow in tar

  Beim Bearbeiten einer PAX Access Control Lists (ACL) in einer
  Archivdatei durch das Kommando tar, kann ein Buffer Overflow
  auftreten. Ein entfernter Angreifer kann diese Schwachstelle durch ein
  speziell konstruiertes tar-Archiv ausnutzen, um beliebige Befehle mit
  den Rechten des Benutzers auszufuehren.

Betroffen sind die folgenden Software Pakete und Plattformen:

  Paket tar in der stable Distribution (sarge) vor Version 1.14-2.1
  Paket tar in der unstable Distribution (sid) vor Version 1.15.1-3

  Stable Distribution (sarge)
  Testing Distribution (sid)

Vom Hersteller werden ueberarbeitete Pakete zur Verfuegung gestellt.

Hersteller Advisory:
  http://www.debian.org/security/2006/dsa-987


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

Mit freundlichen Gruessen,
	Jan Kohlrausch

- -- 
Jan Kohlrausch (CSIRT), DFN-CERT Services GmbH
Web: https://www.dfn-cert.de/, Phone: +49-40-808077-555
PGP RSA/2048, A5DD03D1, A2 55 1C 51 0A 30 3E 78  5B 40 DA B7 14 F7 C9 E8
13.DFN-CERT Workshop "Sicherheit in vernetzten Systemen", 1./2.3.2006

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Debian Security Advisory DSA 987-1                     security at debian.org
http://www.debian.org/security/                         Moritz Muehlenhoff
March 7th, 2006                         http://www.debian.org/security/faq
- - --------------------------------------------------------------------------

Package        : tar
Vulnerability  : buffer overflow
Problem-Type   : local(remote)
Debian-specific: no
CVE ID         : CVE-2006-0300
Debian Bug     : 314805

Jim Meyering discovered several buffer overflows in GNU tar, which may
lead to the execution of arbitrary code through specially crafted tar
archives.

The old stable distribution (woody) is not affected by this problem.

For the stable distribution (sarge) this problem has been fixed in
version 1.14-2.1.

For the unstable distribution (sid) this problem has been fixed in
version 1.15.1-3.

We recommend that you upgrade your tar package.


Upgrade Instructions
- - --------------------

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 3.1 alias sarge
- - --------------------------------

  Source archives:

    http://security.debian.org/pool/updates/main/t/tar/tar_1.14-2.1.dsc
      Size/MD5 checksum:      554 3042cf964a78dcdf6e2b6d249f526ba3
    http://security.debian.org/pool/updates/main/t/tar/tar_1.14-2.1.diff.gz
      Size/MD5 checksum:    21956 5c2a4d59a787257f6193a13cfecef91d
    http://security.debian.org/pool/updates/main/t/tar/tar_1.14.orig.tar.gz
      Size/MD5 checksum:  1485633 3094544702b1affa32d969f0b6459663

  Alpha architecture:

    http://security.debian.org/pool/updates/main/t/tar/tar_1.14-2.1_alpha.deb
      Size/MD5 checksum:   520038 d4b36a6ce0e06c97111d4187ade09962

  AMD64 architecture:

    http://security.debian.org/pool/updates/main/t/tar/tar_1.14-2.1_amd64.deb
      Size/MD5 checksum:   503250 64898d22642566fac2a70318262fc3c5

  ARM architecture:

    http://security.debian.org/pool/updates/main/t/tar/tar_1.14-2.1_arm.deb
      Size/MD5 checksum:   499498 5b6a94b5e9b66062d99f144655671847

  Intel IA-32 architecture:

    http://security.debian.org/pool/updates/main/t/tar/tar_1.14-2.1_i386.deb
      Size/MD5 checksum:   499300 fed1f5e8443e4553e3408588c0f5fedd

  Intel IA-64 architecture:

    http://security.debian.org/pool/updates/main/t/tar/tar_1.14-2.1_ia64.deb
      Size/MD5 checksum:   542832 1165d04108e7a955f625d0fbe0124af0

  HP Precision architecture:

    http://security.debian.org/pool/updates/main/t/tar/tar_1.14-2.1_hppa.deb
      Size/MD5 checksum:   517190 f4ac26e95c28b167ba444c28394632b3

  Motorola 680x0 architecture:

    http://security.debian.org/pool/updates/main/t/tar/tar_1.14-2.1_m68k.deb
      Size/MD5 checksum:   488360 cd50831cac6eb2567c37bc8575cee797

  Big endian MIPS architecture:

    http://security.debian.org/pool/updates/main/t/tar/tar_1.14-2.1_mips.deb
      Size/MD5 checksum:   519882 a3956e10ed7ef0e4aecfba04d6a84538

  Little endian MIPS architecture:

    http://security.debian.org/pool/updates/main/t/tar/tar_1.14-2.1_mipsel.deb
      Size/MD5 checksum:   519624 c8bbe871ba1d3302653fc0d8a4f93da1

  PowerPC architecture:

    http://security.debian.org/pool/updates/main/t/tar/tar_1.14-2.1_powerpc.deb
      Size/MD5 checksum:   506190 5b0ecfa06241e0d482fa2e68a378df88

  IBM S/390 architecture:

    http://security.debian.org/pool/updates/main/t/tar/tar_1.14-2.1_s390.deb
      Size/MD5 checksum:   511234 0397890904020953a5d5ca49e2a51f1b

  Sun Sparc architecture:

    http://security.debian.org/pool/updates/main/t/tar/tar_1.14-2.1_sparc.deb
      Size/MD5 checksum:   499150 554e29b775d1c5400e3514d5a46412ee



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

- - ---------------------------------------------------------------------------------
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 at lists.debian.org
Package info: `apt-cache show <pkg>' and http://packages.debian.org/<pkg>
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