SecurityTracker.com Archives - (Debian Issues Fix for Gnome-gv) 'gv' Postscript and PDF File Viewer Buffer Overflow May Execute Remotely Supplied Code in Malicioius Postscript or PDF Files

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Category: Application (Generic) > gv

Vendors: Plass, Johannes

(Debian Issues Fix for Gnome-gv) 'gv' Postscript and PDF File Viewer Buffer Overflow May Execute Remotely Supplied Code in Malicioius Postscript or PDF Files

SecurityTracker Alert ID: 1005453

CVE Reference: CAN-2002-0838 (Links to External Site)

Date: Oct 18 2002

Impact: Execution of arbitrary code via network, User access via network

Fix Available: Yes Vendor Confirmed: Yes

Version(s): 3.5.8

Description: A buffer overflow vulnerability was reported in the 'gv' postscript and PDF file viewer. A remote user can create a malicious file that, when viewed by the target user, will cause arbitrary code to be executed.

iDEFENSE reported that there is a buffer oveflow due to an unsafe sscanf() call.

A demonstration exploit is provided in the Source Message (it is Base64 encoded). A demonstration exploit transcript is also provided:

[root@victim]# ls -al /tmp/itworked
/bin/ls: /tmp/itworked: No such file or directory
[root@victim]# gv gv-exploit.pdf
[root@victim]# ls -al /tmp/itworked
- -rw-r--r-- 1 root root 0 Aug 22 16:50 /tmp/itworked

Impact: A remote user can create a malicious file that, when viewed by gv, will cause arbitrary code to be executed by the target user's gv viewer. The code will run with the privileges of the target user.

Vendor URL: wwwthep.physik.uni-mainz.de/~plass/gv/ (Links to External Site)

Cause: Boundary error

Underlying OS: Linux (Debian)

Underlying OS Comments: 2.2, 3.0

Reported By: joey@infodrom.org (Martin Schulze)

Message History: This archive entry is a follow-up to the message listed below.

Sep 26 2002

'gv' Postscript and PDF File Viewer Buffer Overflow May Execute Remotely Supplied Code in Malicioius Postscript or PDF Files

Source Message Contents

Date: Fri, 18 Oct 2002 16:00:26 +0200 (CEST)
From: joey@infodrom.org (Martin Schulze)
Subject: [SECURITY] [DSA 179-1] New gnome-gv packages fix buffer overflow

 

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

- --------------------------------------------------------------------------
Debian Security Advisory DSA 179-1                     security@debian.org
http://www.debian.org/security/                             Martin Schulze
October 18th, 2002                      http://www.debian.org/security/faq
- --------------------------------------------------------------------------

Package        : gnome-gv
Vulnerability  : buffer overflow
Problem-Type   : remote
Debian-specific: no
CVE Id         : CAN-2002-0838
BugTraq ID     : 5808

Zen-parse discovered a buffer overflow in gv, a PostScript and PDF
viewer for X11.  The same code is present in gnome-gv.  This problem
is triggered by scanning the PostScript file and can be exploited by
an attacker sending a malformed PostScript or PDF file.  The attacker
is able to cause arbitrary code to be run with the privileges of the
victim.

This problem has been fixed in version 1.1.96-3.1 for the current
stable distribution (woody), in version 0.82-2.1 for the old stable
distribution (potato) and version 1.99.7-9 for the unstable
distribution (sid).

We recommend that you upgrade your gnome-gv package.

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

  Source archives:

    http://security.debian.org/pool/updates/main/g/gnome-gv/gnome-gv_0.82-2.1.dsc
      Size/MD5 checksum:      807 82140169547f88c38b9965be1bc9a69c
    http://security.debian.org/pool/updates/main/g/gnome-gv/gnome-gv_0.82-2.1.diff.gz
      Size/MD5 checksum:     8494 103905f14d882282d0e976a29111bbb2
    http://security.debian.org/pool/updates/main/g/gnome-gv/gnome-gv_0.82.orig.tar.gz
      Size/MD5 checksum:   369538 c4542420f0f7aeafea6764718b398341

  Alpha architecture:

    http://security.debian.org/pool/updates/main/g/gnome-gv/gnome-gv_0.82-2.1_alpha.deb
      Size/MD5 checksum:   145076 05ebc47d64924740b4a6efced375ed00

  ARM architecture:

    http://security.debian.org/pool/updates/main/g/gnome-gv/gnome-gv_0.82-2.1_arm.deb
      Size/MD5 checksum:   131928 44f502cc48717739484999b677b23e52

  Intel IA-32 architecture:

    http://security.debian.org/pool/updates/main/g/gnome-gv/gnome-gv_0.82-2.1_i386.deb
      Size/MD5 checksum:   131118 7d2712b05b78e757568efabee83c9bc0

  Motorola 680x0 architecture:

    http://security.debian.org/pool/updates/main/g/gnome-gv/gnome-gv_0.82-2.1_m68k.deb
      Size/MD5 checksum:   126710 38225171738cca0d10b9c1f91313ad0d

  PowerPC architecture:

    http://security.debian.org/pool/updates/main/g/gnome-gv/gnome-gv_0.82-2.1_powerpc.deb
      Size/MD5 checksum:   132002 b3208e369afc8754480f80f6aa2b11c5

  Sun Sparc architecture:

    http://security.debian.org/pool/updates/main/g/gnome-gv/gnome-gv_0.82-2.1_sparc.deb
      Size/MD5 checksum:   136274 156b99fa91b627e91f5e2c3dde50ffc7


Debian GNU/Linux 3.0 alias woody
- --------------------------------

  Source archives:

    http://security.debian.org/pool/updates/main/g/gnome-gv/gnome-gv_1.1.96-3.1.dsc
      Size/MD5 checksum:      831 4f3c53098ca78e9532f62778f0cf3b0a
    http://security.debian.org/pool/updates/main/g/gnome-gv/gnome-gv_1.1.96-3.1.diff.gz
      Size/MD5 checksum:    23903 b33d66f44f186f88829a0537da99d549
    http://security.debian.org/pool/updates/main/g/gnome-gv/gnome-gv_1.1.96.orig.tar.gz
      Size/MD5 checksum:   742271 5d80db150adb4bfc5398d8a90ee2f9dd

  Alpha architecture:

    http://security.debian.org/pool/updates/main/g/gnome-gv/gnome-gv_1.1.96-3.1_alpha.deb
      Size/MD5 checksum:   340232 87adcdb4e9ef30d25b95734555f3c134

  ARM architecture:

    http://security.debian.org/pool/updates/main/g/gnome-gv/gnome-gv_1.1.96-3.1_arm.deb
      Size/MD5 checksum:   325244 4a5e426144987c2ab8372976ef65c34e

  Intel IA-32 architecture:

    http://security.debian.org/pool/updates/main/g/gnome-gv/gnome-gv_1.1.96-3.1_i386.deb
      Size/MD5 checksum:   320834 73fc7baeba28750356b628eac22e7ec7

  Intel IA-64 architecture:

    http://security.debian.org/pool/updates/main/g/gnome-gv/gnome-gv_1.1.96-3.1_ia64.deb
      Size/MD5 checksum:   380740 e814ebf7089f0717e8d86912ed38cf4b

  HP Precision architecture:

    http://security.debian.org/pool/updates/main/g/gnome-gv/gnome-gv_1.1.96-3.1_hppa.deb
      Size/MD5 checksum:   345956 f9bfa25c891ea680d15e2c68498ba7cc

  Motorola 680x0 architecture:

    http://security.debian.org/pool/updates/main/g/gnome-gv/gnome-gv_1.1.96-3.1_m68k.deb
      Size/MD5 checksum:   314324 dfee84b168b5acc1f2ae7239f7d07f28

  Big endian MIPS architecture:

    http://security.debian.org/pool/updates/main/g/gnome-gv/gnome-gv_1.1.96-3.1_mips.deb
      Size/MD5 checksum:   316934 fc8f5c0c4c71b69acce97f7666187f27

  Little endian MIPS architecture:

    http://security.debian.org/pool/updates/main/g/gnome-gv/gnome-gv_1.1.96-3.1_mipsel.deb
      Size/MD5 checksum:   315270 4d65c8f3619a14e4f0e8df6e8a3c897b

  PowerPC architecture:

    http://security.debian.org/pool/updates/main/g/gnome-gv/gnome-gv_1.1.96-3.1_powerpc.deb
      Size/MD5 checksum:   322280 4cf75a0c3f3ba1cc625ee6a13009f43a

  IBM S/390 architecture:

    http://security.debian.org/pool/updates/main/g/gnome-gv/gnome-gv_1.1.96-3.1_s390.deb
      Size/MD5 checksum:   321032 60c0866b15e838f97fcdb11380d94aea

  Sun Sparc architecture:

    http://security.debian.org/pool/updates/main/g/gnome-gv/gnome-gv_1.1.96-3.1_sparc.deb
      Size/MD5 checksum:   342248 52513f97ca364ed7978f8050a19c4ef2


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

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

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=GNW4
-----END PGP SIGNATURE-----


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