SecurityTracker.com Archives - Jgroff pic Utility Format String Vulnerability Allows Remote Users to Execute Arbitrary Commands on the Server with 'lp' User Privileges

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Category: Application (Generic) > Jgroff

Vendors: [Multiple Authors/Vendors]

Jgroff pic Utility Format String Vulnerability Allows Remote Users to Execute Arbitrary Commands on the Server with 'lp' User Privileges

Date: Jan 31 2002

Impact: Execution of arbitrary code via network

Fix Available: Yes Vendor Confirmed: Yes

Description: A format string vulnerability was reported in the jgroff package, a version of groff with Japanese character sets. A remote user to execute arbitrary commands on the printer server with the privileges of the 'lp' user.

The 'pic' component of jgroff is reportedly used by troff-to-ps.fpi with 'lp' user privileges when perl, troff and LPRng are installed. The vulnerability allows a remote user to connect to the vulnerable server's printer port and cause arbitrary shell commands to be executed with the privileges of the 'lp' user account.

Impact: A remote user can cause arbitrary shell commands to be executed with the privileges of the 'lp' user account.

Cause: Input validation error

Underlying OS: Linux (Any), UNIX (Any)

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

Message History: None.

Source Message Contents

Date: Wed, 30 Jan 2002 18:20:14 +0100 (CET)
From: joey@infodrom.org (Martin Schulze)
Subject: [SECURITY] [DSA 107-1] New jgroff packages fix printf format problem

 

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

- --------------------------------------------------------------------------
Debian Security Advisory DSA 107-1                     security@debian.org
http://www.debian.org/security/                             Martin Schulze
January 30th, 2002  
- --------------------------------------------------------------------------

Package        : jgroff
Vulnerability  : format print
Problem-Type   : local
Debian-specific: no

Basically, this is the same Security Advisory as DSA 072-1, but for
jgroff instead of groff.  The package jgroff contains a version
derived from groff that has japaneze character sets enabled.  This
package is available only in the stable release of Debian, patches for
japanese support have been merged into the main groff package.

The old advisory said:

Zenith Parse found a security problem in groff (the GNU version of
troff).  The pic command was vulnerable to a printf format attack
which made it possible to circumvent the `-S' option and execute
arbitrary code.

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/dists/stable/updates/main/source/jgroff_1.15+ja-3.4.diff.gz
      MD5 checksum: ba0fffab320b5881f467c4f52788169a
    http://security.debian.org/dists/stable/updates/main/source/jgroff_1.15+ja-3.4.dsc
      MD5 checksum: e37b47561a5988793fa1da9a145d2ac0
    http://security.debian.org/dists/stable/updates/main/source/jgroff_1.15+ja.orig.tar.gz
      MD5 checksum: dc1d97074ac73ab0e645a1b80d9639f2

  Alpha architecture:

    http://security.debian.org/dists/stable/updates/main/binary-alpha/jgroff_1.15+ja-3.4_alpha.deb
      MD5 checksum: 5f5eb9347ba9d88e76f10d85350c7c88

  ARM architecture:

    http://security.debian.org/dists/stable/updates/main/binary-arm/jgroff_1.15+ja-3.4_arm.deb
      MD5 checksum: 46adbcf3aa0eb0b4772a6a1364d92c72

  Intel ia32 architecture:

    http://security.debian.org/dists/stable/updates/main/binary-i386/jgroff_1.15+ja-3.4_i386.deb
      MD5 checksum: 1980d28cf9c24231e3583ba994402388

  Motorola 680x0 architecture:

    http://security.debian.org/dists/stable/updates/main/binary-m68k/jgroff_1.15+ja-3.4_m68k.deb
      MD5 checksum: 02327d6d85d7a51b2654af373e5508b2

  PowerPC architecture:

    http://security.debian.org/dists/stable/updates/main/binary-powerpc/jgroff_1.15+ja-3.4_powerpc.de
b
      MD5 checksum: 3f08beb01d355399e11bfaa4d28433f1

  Sun Sparc architecture:

    http://security.debian.org/dists/stable/updates/main/binary-sparc/jgroff_1.15+ja-3.4_sparc.deb
      MD5 checksum: a0443303f539c40f3b9415b7035abc7d


  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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Version: GnuPG v1.0.6 (GNU/Linux)
Comment: For info see http://www.gnupg.org

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emMefqtyAlRej9L40ew8TyE=
=BINw
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