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dvips uses system() function insecurely thereby allowing arbitrary command execution

Vulnerability Note VU#169841

Original Release Date: 2002-10-16 | Last Revised: 2002-12-12

Overview

A vulnerability in the dvips utility can allow a remote attacker to execute arbitrary code on a vulnerable system.

Description

The dvips utility is used to convert DVI files to PostScript(TM). Typically the output is sent to the printer.

RHSA-2002:194-18 states the vulnerability occurs because dvips, "uses the system() function insecurely when managing fonts."

Impact

A remote attacker can execute arbitrary code with the privileges of the lp user.

Solution

Apply a patch.

Workaround

The following workaround is taken from RHSA-2002:194-18:

A work around for this vulnerability is to remove the print filter for DVI files.  The following commands, run as root, will accomplish this:

rm -f /usr/share/printconf/mf_rules/mf40-tetex_filters
rm -f /usr/lib/rhs/rhs-printfilters/dvi-to-ps.fpi

However, to fix the problem in the dvips utility as well as removing the print filter we recommend that all users upgrade these errata packages which contain a patch for this issue.

Vendor Information

169841
 
Affected   Unknown   Unaffected

Debian

Updated:  December 12, 2002

Status

  Vulnerable

Vendor Statement

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

- --------------------------------------------------------------------------
Debian Security Advisory DSA 207-1                     security@debian.org
http://www.debian.org/security/                             Martin Schulze
December 11th, 2002                    
http://www.debian.org/security/faq
- --------------------------------------------------------------------------

Package        : tetex-bin
Vulnerability  : arbitrary command execution
Problem-type   : remote
Debian-specific: no
CVE Id         : CAN-2002-0836

The SuSE security team discovered a vulnerability in kpathsea library
(libkpathsea) which is used by xdvi and dvips.  Both programs call the
system() function insecurely, which allows a remote attacker to
execute arbitrary commands via cleverly crafted DVI files.

If dvips is used in a print filter, this allows a local or remote
attacker with print permission execute arbitrary code as the printer
user (usually lp).

This problem has been fixed in version 1.0.7+20011202-7.1for the
current stable distribution (woody), in version 1.0.6-7.3 for the old
stable distribution (potato) and in version 1.0.7+20021025-4 for the
unstable distribution (sid).  xdvik-ja and dvipsk-ja are vulnerable as
well, but link to the kpathsea library dynamically and will
automatically be fixed after a new libkpathsea is installed.

We recommend that you upgrade your tetex-lib 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
- ---------------------------------

  Source archives:

    http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-bin_1.0.6-7.3.dsc
     Size/MD5 checksum:      681 85d39461d6074e345475974700302ca5
   
http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-bin_1.0.6-7.3.diff.gz
     Size/MD5 checksum:    21219 fc56db28dde023dd14b8dfba2c305ed8
   
http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-bin_1.0.6.orig.tar.gz
     Size/MD5 checksum:  7991177 6cb0539e028dc2629b59364c336e9f02

  Alpha architecture:

    http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-bin_1.0.6-7.3_alpha.deb
     Size/MD5 checksum:  3345472 92b942291b77f8bb1c51d47e7e442200
   
http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-dev_1.0.6-7.3_alpha.deb
     Size/MD5 checksum:    86086 ffceb41144a78755652b05e62690503a
   
http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-lib_1.0.6-7.3_alpha.deb
     Size/MD5 checksum:    46436 9a8301c361af3537ce71b671f290d118

  ARM architecture:

    http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-bin_1.0.6-7.3_arm.deb
     Size/MD5 checksum:  3128872 a7d4c2fa53e548b25f3eff5260ce0cba
   
http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-dev_1.0.6-7.3_arm.deb
     Size/MD5 checksum:    66412 76eea8557db60db134f7e5c69667866e
   
http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-lib_1.0.6-7.3_arm.deb
     Size/MD5 checksum:    35326 805f9c77405093e812afac2fb151db44

  Intel IA-32 architecture:

    http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-bin_1.0.6-7.3_i386.deb
     Size/MD5 checksum:  2656066 7a84a5905bf56c67a0eaf4d4fbd12ffd
   
http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-dev_1.0.6-7.3_i386.deb
     Size/MD5 checksum:    63794 262135c0af64616080f10573fb2af29d
   
http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-lib_1.0.6-7.3_i386.deb
     Size/MD5 checksum:    33194 4a042dc080fb61834fea8bd3b5c50123

  Motorola 680x0 architecture:

    http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-bin_1.0.6-7.3_m68k.deb
     Size/MD5 checksum:  2470542 b19ef2ede1a49f823b0ce189f010ed71
   
http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-dev_1.0.6-7.3_m68k.deb
     Size/MD5 checksum:    63010 3f1d9c790839a271e8ad3371a062b99e
   
http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-lib_1.0.6-7.3_m68k.deb
     Size/MD5 checksum:    33454 6821d66ef900023deb6a125d84f7436a

  PowerPC architecture:

    http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-bin_1.0.6-7.3_powerpc.deb
     Size/MD5 checksum:  3064800 bb353bcc816dd2addc54c3f723a7314d
   
http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-dev_1.0.6-7.3_powerpc.deb
     Size/MD5 checksum:    74960 86fe8df6b1605a76e98ef435a9b4d94d
   
http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-lib_1.0.6-7.3_powerpc.deb
     Size/MD5 checksum:    37252 b3c71917f22d84c2bdb97c5b63532e52

  Sun Sparc architecture:

    http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-bin_1.0.6-7.3_sparc.deb
     Size/MD5 checksum:  3067948 ccbc6c50d89ee3ff1f4b62daf79748e2
   
http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-dev_1.0.6-7.3_sparc.deb
     Size/MD5 checksum:    71708 01e2610c8d35a7bab8369e5f3ba1df71
   
http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-lib_1.0.6-7.3_sparc.deb
     Size/MD5 checksum:    40442 6cf1c922eada4a22178a853142c91713


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

  Source archives:

    http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-bin_1.0.7+20011202-7.1.dsc
     Size/MD5 checksum:      874 8f366565d4f387475f6ef6bb9aa974d7
   
http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-bin_1.0.7+20011202-7.1.tar.gz
     Size/MD5 checksum: 10324253 f450e1704d90950f85bb31eefbf2f45e

  Alpha architecture:

    http://security.debian.org/pool/updates/main/t/tetex-bin/libkpathsea-dev_1.0.7+20011202-7.1_alpha.deb
     Size/MD5 checksum:    84650 d79e3667791a8110019cb2f96c0d0516
   
http://security.debian.org/pool/updates/main/t/tetex-bin/libkpathsea3_1.0.7+20011202-7.1_alpha.deb
     Size/MD5 checksum:    52786 db83b6b35fc7b932aaf0e8f59ae7da7a
   
http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-bin_1.0.7+20011202-7.1_alpha.deb
     Size/MD5 checksum:  4567604 70774235aa253481147d28d685abbaea

  ARM architecture:

    http://security.debian.org/pool/updates/main/t/tetex-bin/libkpathsea-dev_1.0.7+20011202-7.1_arm.deb
     Size/MD5 checksum:    65274 90a77d388e36745006ec0aaa6417491d
   
http://security.debian.org/pool/updates/main/t/tetex-bin/libkpathsea3_1.0.7+20011202-7.1_arm.deb
     Size/MD5 checksum:    43402 108a54db3c99b58188cdee22b965c005
   
http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-bin_1.0.7+20011202-7.1_arm.deb
     Size/MD5 checksum:  3703124 8439e1875463efc76cbf58e37e17a33a

  Intel IA-32 architecture:

    http://security.debian.org/pool/updates/main/t/tetex-bin/libkpathsea-dev_1.0.7+20011202-7.1_i386.deb
     Size/MD5 checksum:    62628 31a398d458ed0fd5939929f3afcd8e57
   
http://security.debian.org/pool/updates/main/t/tetex-bin/libkpathsea3_1.0.7+20011202-7.1_i386.deb
     Size/MD5 checksum:    40500 ade94b526f08f7edb80b7c8126578ad4
   
http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-bin_1.0.7+20011202-7.1_i386.deb
     Size/MD5 checksum:  3136836 98eedd394be628b62bf489ccf4ac7288

  Intel IA-64 architecture:

    http://security.debian.org/pool/updates/main/t/tetex-bin/libkpathsea-dev_1.0.7+20011202-7.1_ia64.deb
     Size/MD5 checksum:    89724 acd2ca69f8c92a269ecb53ac10b428dd
   
http://security.debian.org/pool/updates/main/t/tetex-bin/libkpathsea3_1.0.7+20011202-7.1_ia64.deb
     Size/MD5 checksum:    63122 56fb6234748eab1261fe6779cc2bd5f9
   
http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-bin_1.0.7+20011202-7.1_ia64.deb
     Size/MD5 checksum:  5597520 b4342bdcba6ea92adfc6fd547246e597

  HP Precision architecture:

    http://security.debian.org/pool/updates/main/t/tetex-bin/libkpathsea-dev_1.0.7+20011202-7.1_hppa.deb
     Size/MD5 checksum:    79348 686d1ad04aa6d07ebd33622f78d4c0b3
   
http://security.debian.org/pool/updates/main/t/tetex-bin/libkpathsea3_1.0.7+20011202-7.1_hppa.deb
     Size/MD5 checksum:    49110 204b2d736e592c19a864e6edbe013db3
   
http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-bin_1.0.7+20011202-7.1_hppa.deb
     Size/MD5 checksum:  4105546 a4eda30de5ed51e1c75f979a069b0c67

  Motorola 680x0 architecture:

    http://security.debian.org/pool/updates/main/t/tetex-bin/libkpathsea-dev_1.0.7+20011202-7.1_m68k.deb
     Size/MD5 checksum:    61940 79ae1c797a94286d2571431a387ed410
   
http://security.debian.org/pool/updates/main/t/tetex-bin/libkpathsea3_1.0.7+20011202-7.1_m68k.deb
     Size/MD5 checksum:    41130 0ebbbf434a9981d68aadc166bf8ba264
   
http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-bin_1.0.7+20011202-7.1_m68k.deb
     Size/MD5 checksum:  2922476 80cd4093b37cd3f67571d427c270cce7

  Big endian MIPS architecture:

    http://security.debian.org/pool/updates/main/t/tetex-bin/libkpathsea-dev_1.0.7+20011202-7.1_mips.deb
     Size/MD5 checksum:    75094 05006f5ed906f1a154e2f653a7d43d19
   
http://security.debian.org/pool/updates/main/t/tetex-bin/libkpathsea3_1.0.7+20011202-7.1_mips.deb
     Size/MD5 checksum:    42156 71efe3f47f1cfe1fa94bc977832d14b3
   
http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-bin_1.0.7+20011202-7.1_mips.deb
     Size/MD5 checksum:  3941092 22b7964938513694d7665c832b234035

  Little endian MIPS architecture:

    http://security.debian.org/pool/updates/main/t/tetex-bin/libkpathsea-dev_1.0.7+20011202-7.1_mipsel.deb
     Size/MD5 checksum:    74886 833cc732ed934563f5582b652dc4b056
   
http://security.debian.org/pool/updates/main/t/tetex-bin/libkpathsea3_1.0.7+20011202-7.1_mipsel.deb
     Size/MD5 checksum:    42350 4e50a31e4f219f53146a7f790bde4747
   
http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-bin_1.0.7+20011202-7.1_mipsel.deb
     Size/MD5 checksum:  3899354 17f6313d6073d1557c988e028b5a7bb0

  PowerPC architecture:

    http://security.debian.org/pool/updates/main/t/tetex-bin/libkpathsea-dev_1.0.7+20011202-7.1_powerpc.deb
     Size/MD5 checksum:    73934 2a6a193f1acb64784473965cc49ac610
   
http://security.debian.org/pool/updates/main/t/tetex-bin/libkpathsea3_1.0.7+20011202-7.1_powerpc.deb
     Size/MD5 checksum:    45040 45b3a8a439e7eb68cc87f24ebe81e945
   
http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-bin_1.0.7+20011202-7.1_powerpc.deb
     Size/MD5 checksum:  3586312 9fa3b7e4c724db99e0214204b791123e

  IBM S/390 architecture:

    http://security.debian.org/pool/updates/main/t/tetex-bin/libkpathsea-dev_1.0.7+20011202-7.1_s390.deb
     Size/MD5 checksum:    63928 f45e1a0bd5b9e69a3c8f9db16cd041df
   
http://security.debian.org/pool/updates/main/t/tetex-bin/libkpathsea3_1.0.7+20011202-7.1_s390.deb
     Size/MD5 checksum:    43052 489de74e0a77f1269fbd116ddbb922a3
   
http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-bin_1.0.7+20011202-7.1_s390.deb
     Size/MD5 checksum:  3383454 3ada8fc381e60370cdf037e817b3978c

  Sun Sparc architecture:

    http://security.debian.org/pool/updates/main/t/tetex-bin/libkpathsea-dev_1.0.7+20011202-7.1_sparc.deb
     Size/MD5 checksum:    70708 a34f6c87173cb0754e435cfd0040f7d3
   
http://security.debian.org/pool/updates/main/t/tetex-bin/libkpathsea3_1.0.7+20011202-7.1_sparc.deb
     Size/MD5 checksum:    48512 e80f52795254d7fc3adac437a0898d97
   
http://security.debian.org/pool/updates/main/t/tetex-bin/tetex-bin_1.0.7+20011202-7.1_sparc.deb
     Size/MD5 checksum:  3598374 8b834d6c56cba09cbdb9402f4b263141


  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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Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

The CERT/CC has no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Red Hat Inc.

Updated:  October 16, 2002

Status

  Vulnerable

Vendor Statement

https://rhn.redhat.com/errata/RHSA-2002-194.html

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

The CERT/CC has no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.


CVSS Metrics

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A

References

Acknowledgements

This vulnerability was discovered by Olaf Kirch of SuSE

This document was written by Ian A. Finlay and is based on information provided by Red Hat Inc.

Other Information

CVE IDs: CVE-2002-0836
Severity Metric: 24.84
Date Public: 2002-10-15
Date First Published: 2002-10-16
Date Last Updated: 2002-12-12 19:41 UTC
Document Revision: 14

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