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Category:   Application (Generic)  >   LXR Vendors:   lxr.sourceforge.net
(Debian Issues Fix) Linux Cross-Referencing (LXR) Project Discloses Files on the System to Remote Users
SecurityTracker Alert ID:  1006334
SecurityTracker URL:  http://securitytracker.com/id/1006334
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Mar 20 2003
Impact:   Disclosure of system information, Disclosure of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   An input validation vulnerability was reported in the Linux Cross-Referencing (LXR) project software. A remote user can view files located anywhere on the system.

It is reported that the software does not properly filter user-supplied input in the 'v' variable. A remote user can reportedly supply a specially crafted URL containing '../' directory traversal characters to view arbitrary files on the system with the privileges of the target web server. A demonstration exploit URL is provided:

http://[target]/source?v=../../../../../../../etc/password%00

Impact:   A remote user can view files located anywhere on the system that are readable by the web server process.
Solution:   Debian has released a fix in version 0.3-3 for the stable distribution (woody) and in version 0.3-4 for the unstable distribution (sid).

Debian GNU/Linux 3.0 alias woody:

Source archives:

http://security.debian.org/pool/updates/main/l/lxr/lxr_0.3-3.dsc
Size/MD5 checksum: 529 2247880271390dcc2e8b5840e35b8740
http://security.debian.org/pool/updates/main/l/lxr/lxr_0.3-3.diff.gz
Size/MD5 checksum: 4741 c4ac9ea82443f00fc6d893eac95d0eb6
http://security.debian.org/pool/updates/main/l/lxr/lxr_0.3.orig.tar.gz
Size/MD5 checksum: 29354 57417ee8fdafef8e04141690c7a8b6aa

Alpha architecture:

http://security.debian.org/pool/updates/main/l/lxr/lxr_0.3-3_alpha.deb
Size/MD5 checksum: 25916 7afae8f316b5d49460ec228ce65505e3

ARM architecture:

http://security.debian.org/pool/updates/main/l/lxr/lxr_0.3-3_arm.deb
Size/MD5 checksum: 25930 3f0c071bd857b60094bab17710740feb

Intel IA-32 architecture:

http://security.debian.org/pool/updates/main/l/lxr/lxr_0.3-3_i386.deb
Size/MD5 checksum: 25922 b0e19c5aaf6930b9e88d1a2dd0e4828e

Intel IA-64 architecture:

http://security.debian.org/pool/updates/main/l/lxr/lxr_0.3-3_ia64.deb
Size/MD5 checksum: 25916 30f33037dbf3b0c7a2f38e4792253ff9

HP Precision architecture:

http://security.debian.org/pool/updates/main/l/lxr/lxr_0.3-3_hppa.deb
Size/MD5 checksum: 25924 a3afbdeca4e74064c2ad93f8d89f02cb

Motorola 680x0 architecture:

http://security.debian.org/pool/updates/main/l/lxr/lxr_0.3-3_m68k.deb
Size/MD5 checksum: 25954 57d078cff179225eb026275f21e7ffff

Big endian MIPS architecture:

http://security.debian.org/pool/updates/main/l/lxr/lxr_0.3-3_mips.deb
Size/MD5 checksum: 25920 3051ef49ccd9cceeb6bc2c4ade214227

Little endian MIPS architecture:

http://security.debian.org/pool/updates/main/l/lxr/lxr_0.3-3_mipsel.deb
Size/MD5 checksum: 25944 64c72605a28df3c8f8e0b7728509c3fe

PowerPC architecture:

http://security.debian.org/pool/updates/main/l/lxr/lxr_0.3-3_powerpc.deb
Size/MD5 checksum: 25918 f282e391627defac8898b78da1eb5f1a

IBM S/390 architecture:

http://security.debian.org/pool/updates/main/l/lxr/lxr_0.3-3_s390.deb
Size/MD5 checksum: 25912 3911d941d4036b6eab20b06ceb572e59

Sun Sparc architecture:

http://security.debian.org/pool/updates/main/l/lxr/lxr_0.3-3_sparc.deb
Size/MD5 checksum: 25922 2c54bb734a88ae4f52eee6a2331359ec

Vendor URL:  sourceforge.net/projects/lxr (Links to External Site)
Cause:   Input validation error
Underlying OS:  Linux (Debian)
Underlying OS Comments:  3.0

Message History:   This archive entry is a follow-up to the message listed below.
Mar 11 2003 Linux Cross-Referencing (LXR) Project Discloses Files on the System to Remote Users



 Source Message Contents

Subject:  [SECURITY] [DSA 264-1] New lxr packages fix information disclosure


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

- --------------------------------------------------------------------------
Debian Security Advisory DSA 264-1                     security@debian.org
http://www.debian.org/security/                             Martin Schulze
March 19th, 2003                        http://www.debian.org/security/faq
- --------------------------------------------------------------------------

Package        : lxr
Vulnerability  : missing filename sanitizing
Problem-Type   : remote
Debian-specific: no

Upstream developers of lxr, a general hypertext cross-referencing
tool, have been alerted of a vulnerability that allows a remote
attacker to read arbitrary files on the host system as user www-data.
This could disclose local files that were not meant to be shared with
the public.

For the stable distribution (woody) this problem has been
fixed in version 0.3-3.

The old stable distribution (potato) is not affected since it does not
contain an lxr package.

For the unstable distribution (sid) this problem has been
fixed in version 0.3-4.

We recommend that you upgrade your lxr 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/l/lxr/lxr_0.3-3.dsc
      Size/MD5 checksum:      529 2247880271390dcc2e8b5840e35b8740
    http://security.debian.org/pool/updates/main/l/lxr/lxr_0.3-3.diff.gz
      Size/MD5 checksum:     4741 c4ac9ea82443f00fc6d893eac95d0eb6
    http://security.debian.org/pool/updates/main/l/lxr/lxr_0.3.orig.tar.gz
      Size/MD5 checksum:    29354 57417ee8fdafef8e04141690c7a8b6aa

  Alpha architecture:

    http://security.debian.org/pool/updates/main/l/lxr/lxr_0.3-3_alpha.deb
      Size/MD5 checksum:    25916 7afae8f316b5d49460ec228ce65505e3

  ARM architecture:

    http://security.debian.org/pool/updates/main/l/lxr/lxr_0.3-3_arm.deb
      Size/MD5 checksum:    25930 3f0c071bd857b60094bab17710740feb

  Intel IA-32 architecture:

    http://security.debian.org/pool/updates/main/l/lxr/lxr_0.3-3_i386.deb
      Size/MD5 checksum:    25922 b0e19c5aaf6930b9e88d1a2dd0e4828e

  Intel IA-64 architecture:

    http://security.debian.org/pool/updates/main/l/lxr/lxr_0.3-3_ia64.deb
      Size/MD5 checksum:    25916 30f33037dbf3b0c7a2f38e4792253ff9

  HP Precision architecture:

    http://security.debian.org/pool/updates/main/l/lxr/lxr_0.3-3_hppa.deb
      Size/MD5 checksum:    25924 a3afbdeca4e74064c2ad93f8d89f02cb

  Motorola 680x0 architecture:

    http://security.debian.org/pool/updates/main/l/lxr/lxr_0.3-3_m68k.deb
      Size/MD5 checksum:    25954 57d078cff179225eb026275f21e7ffff

  Big endian MIPS architecture:

    http://security.debian.org/pool/updates/main/l/lxr/lxr_0.3-3_mips.deb
      Size/MD5 checksum:    25920 3051ef49ccd9cceeb6bc2c4ade214227

  Little endian MIPS architecture:

    http://security.debian.org/pool/updates/main/l/lxr/lxr_0.3-3_mipsel.deb
      Size/MD5 checksum:    25944 64c72605a28df3c8f8e0b7728509c3fe

  PowerPC architecture:

    http://security.debian.org/pool/updates/main/l/lxr/lxr_0.3-3_powerpc.deb
      Size/MD5 checksum:    25918 f282e391627defac8898b78da1eb5f1a

  IBM S/390 architecture:

    http://security.debian.org/pool/updates/main/l/lxr/lxr_0.3-3_s390.deb
      Size/MD5 checksum:    25912 3911d941d4036b6eab20b06ceb572e59

  Sun Sparc architecture:

    http://security.debian.org/pool/updates/main/l/lxr/lxr_0.3-3_sparc.deb
      Size/MD5 checksum:    25922 2c54bb734a88ae4f52eee6a2331359ec



  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 v1.2.1 (GNU/Linux)

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bj/pRFJHjQL1HOxmxu37TNo=
=e1pW
-----END PGP SIGNATURE-----


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