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Category:   Application (Game)  >   Xconq Vendors:   Shebs, Stanley T.
(Debian Issues Fix) Xconq Game USER Environment Variable Buffer Overflow Lets Local Users Gain Elevated Privileges
SecurityTracker Alert ID:  1007334
SecurityTracker URL:  http://securitytracker.com/id/1007334
CVE Reference:   CVE-2003-0607   (Links to External Site)
Updated:  Mar 11 2004
Original Entry Date:  Jul 30 2003
Impact:   Execution of arbitrary code via local system, User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): Tested on 7.3.3, 7.4.1
Description:   A buffer overflow vulnerability was reported in the Xconq game. A local user can gain elevated privileges on the system.

Secunia reported that a local user can set a specially crafted value for the 'USER' environment variable to trigger an overflow in the make_default_player_spec() function. A local user can execute arbitrary code with 'games' group privileges, according to the report.

Steve Kemp is credited with reporting this flaw.

Impact:   A local user can execute arbitrary code with 'games' group privileges.
Solution:   Debian has released a fix in version 7.4.1-2woody2 for the current stable distribution (woody). A fix for the unstable distribution (sid) is pending.

Debian GNU/Linux 3.0 alias woody:

Source archives:

http://security.debian.org/pool/updates/main/x/xconq/xconq_7.4.1-2woody2.dsc
Size/MD5 checksum: 659 21842c8a96442ba3fb5339485c8bc83e
http://security.debian.org/pool/updates/main/x/xconq/xconq_7.4.1-2woody2.diff.gz
Size/MD5 checksum: 36648 4ad0be0f65d303d85cd15c7b3a0ba2aa
http://security.debian.org/pool/updates/main/x/xconq/xconq_7.4.1.orig.tar.gz
Size/MD5 checksum: 3401768 2b3eaa6ae341f64d32a4d8c361aa0456

Architecture independent components:

http://security.debian.org/pool/updates/main/x/xconq/xconq-common_7.4.1-2woody2_all.deb
Size/MD5 checksum: 1243930 a5bf65b7a6f969cc6ea892dcb5561442
http://security.debian.org/pool/updates/main/x/xconq/xconq-doc_7.4.1-2woody2_all.deb
Size/MD5 checksum: 1279490 6ad1a14bece922518105dc59e3dec3a2

Alpha architecture:

http://security.debian.org/pool/updates/main/x/xconq/xconq_7.4.1-2woody2_alpha.deb
Size/MD5 checksum: 765484 901f3fa5491b5ca3cb6e9c6777d7d7fd

ARM architecture:

http://security.debian.org/pool/updates/main/x/xconq/xconq_7.4.1-2woody2_arm.deb
Size/MD5 checksum: 662772 40e6eebdbc310e9aa41f8d5fa703c42d

Intel IA-32 architecture:

http://security.debian.org/pool/updates/main/x/xconq/xconq_7.4.1-2woody2_i386.deb
Size/MD5 checksum: 591832 882d76656a399ff29d682926177eaf18

Intel IA-64 architecture:

http://security.debian.org/pool/updates/main/x/xconq/xconq_7.4.1-2woody2_ia64.deb
Size/MD5 checksum: 1234652 15e58939c9fa6730791ae857432e30e5

HP Precision architecture:

http://security.debian.org/pool/updates/main/x/xconq/xconq_7.4.1-2woody2_hppa.deb
Size/MD5 checksum: 647046 59f689429d17a95858157d71ebbabdfe

Motorola 680x0 architecture:

http://security.debian.org/pool/updates/main/x/xconq/xconq_7.4.1-2woody2_m68k.deb
Size/MD5 checksum: 545314 4f792331fd5a376676e5992b6d7523ee

Big endian MIPS architecture:

http://security.debian.org/pool/updates/main/x/xconq/xconq_7.4.1-2woody2_mips.deb
Size/MD5 checksum: 693316 0e3a8eff3df06a5612d79f49a8a1eab7

Little endian MIPS architecture:

http://security.debian.org/pool/updates/main/x/xconq/xconq_7.4.1-2woody2_mipsel.deb
Size/MD5 checksum: 690160 03a263baebbcaef62ef0ccf329ccc874

PowerPC architecture:

http://security.debian.org/pool/updates/main/x/xconq/xconq_7.4.1-2woody2_powerpc.deb
Size/MD5 checksum: 585610 68313a2e1e5a5a1e8b66883894f296e9

IBM S/390 architecture:

http://security.debian.org/pool/updates/main/x/xconq/xconq_7.4.1-2woody2_s390.deb
Size/MD5 checksum: 587336 ef95a0305f193e14ebfcc086381a15f1

Sun Sparc architecture:

http://security.debian.org/pool/updates/main/x/xconq/xconq_7.4.1-2woody2_sparc.deb
Size/MD5 checksum: 604292 632d2a38d285c3aea6ca240f9bd9329c

Vendor URL:  sources.redhat.com/xconq/ (Links to External Site)
Cause:   Boundary error
Underlying OS:  Linux (Debian)
Underlying OS Comments:  3.0

Message History:   This archive entry is a follow-up to the message listed below.
Jul 28 2003 Xconq Game USER Environment Variable Buffer Overflow Lets Local Users Gain Elevated Privileges



 Source Message Contents

Subject:  [SECURITY] [DSA-354-1] New xconq packages fix buffer overflows


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

- --------------------------------------------------------------------------
Debian Security Advisory DSA 354-1                     security@debian.org
http://www.debian.org/security/                             Matt Zimmerman
July 29th, 2003                         http://www.debian.org/security/faq
- --------------------------------------------------------------------------

Package        : xconq
Vulnerability  : buffer overflows
Problem-Type   : local
Debian-specific: no
CVE Ids        : CAN-2003-0607

Steve Kemp discovered a buffer overflow in xconq, in processing the
USER environment variable.  In the process of fixing this bug, a
similar problem was discovered with the DISPLAY environment
variable.  This vulnerability could be exploited by a local attacker
to gain gid 'games'.

For the current stable distribution (woody) this problem has been fixed
in version 7.4.1-2woody2.

For the unstable distribution (sid) this problem will be fixed soon.
Refer to Debian bug #202963.

We recommend that you update your xconq 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 3.0 alias woody
- --------------------------------

  Source archives:

    http://security.debian.org/pool/updates/main/x/xconq/xconq_7.4.1-2woody2.dsc
      Size/MD5 checksum:      659 21842c8a96442ba3fb5339485c8bc83e
    http://security.debian.org/pool/updates/main/x/xconq/xconq_7.4.1-2woody2.diff.gz
      Size/MD5 checksum:    36648 4ad0be0f65d303d85cd15c7b3a0ba2aa
    http://security.debian.org/pool/updates/main/x/xconq/xconq_7.4.1.orig.tar.gz
      Size/MD5 checksum:  3401768 2b3eaa6ae341f64d32a4d8c361aa0456

  Architecture independent components:

    http://security.debian.org/pool/updates/main/x/xconq/xconq-common_7.4.1-2woody2_all.deb
      Size/MD5 checksum:  1243930 a5bf65b7a6f969cc6ea892dcb5561442
    http://security.debian.org/pool/updates/main/x/xconq/xconq-doc_7.4.1-2woody2_all.deb
      Size/MD5 checksum:  1279490 6ad1a14bece922518105dc59e3dec3a2

  Alpha architecture:

    http://security.debian.org/pool/updates/main/x/xconq/xconq_7.4.1-2woody2_alpha.deb
      Size/MD5 checksum:   765484 901f3fa5491b5ca3cb6e9c6777d7d7fd

  ARM architecture:

    http://security.debian.org/pool/updates/main/x/xconq/xconq_7.4.1-2woody2_arm.deb
      Size/MD5 checksum:   662772 40e6eebdbc310e9aa41f8d5fa703c42d

  Intel IA-32 architecture:

    http://security.debian.org/pool/updates/main/x/xconq/xconq_7.4.1-2woody2_i386.deb
      Size/MD5 checksum:   591832 882d76656a399ff29d682926177eaf18

  Intel IA-64 architecture:

    http://security.debian.org/pool/updates/main/x/xconq/xconq_7.4.1-2woody2_ia64.deb
      Size/MD5 checksum:  1234652 15e58939c9fa6730791ae857432e30e5

  HP Precision architecture:

    http://security.debian.org/pool/updates/main/x/xconq/xconq_7.4.1-2woody2_hppa.deb
      Size/MD5 checksum:   647046 59f689429d17a95858157d71ebbabdfe

  Motorola 680x0 architecture:

    http://security.debian.org/pool/updates/main/x/xconq/xconq_7.4.1-2woody2_m68k.deb
      Size/MD5 checksum:   545314 4f792331fd5a376676e5992b6d7523ee

  Big endian MIPS architecture:

    http://security.debian.org/pool/updates/main/x/xconq/xconq_7.4.1-2woody2_mips.deb
      Size/MD5 checksum:   693316 0e3a8eff3df06a5612d79f49a8a1eab7

  Little endian MIPS architecture:

    http://security.debian.org/pool/updates/main/x/xconq/xconq_7.4.1-2woody2_mipsel.deb
      Size/MD5 checksum:   690160 03a263baebbcaef62ef0ccf329ccc874

  PowerPC architecture:

    http://security.debian.org/pool/updates/main/x/xconq/xconq_7.4.1-2woody2_powerpc.deb
      Size/MD5 checksum:   585610 68313a2e1e5a5a1e8b66883894f296e9

  IBM S/390 architecture:

    http://security.debian.org/pool/updates/main/x/xconq/xconq_7.4.1-2woody2_s390.deb
      Size/MD5 checksum:   587336 ef95a0305f193e14ebfcc086381a15f1

  Sun Sparc architecture:

    http://security.debian.org/pool/updates/main/x/xconq/xconq_7.4.1-2woody2_sparc.deb
      Size/MD5 checksum:   604292 632d2a38d285c3aea6ca240f9bd9329c

  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 v1.2.2 (GNU/Linux)

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TkFr+RGj9ZiT9yAJqxh77N0=
=Zo82
-----END PGP SIGNATURE-----


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