BMV symlink attack

bmv-symlink (18823) The risk level is classified as MediumMedium Risk

Description:

BMV (BitMap Viewer) creates temporary files insecurely. A local attacker could use this vulnerability to create symbolic links from a temporary file to overwrite arbitrary files on the system.


Consequences:

File Manipulation

Remedy:

For Debian GNU/Linux 3.0 (woody):
Upgrade to the latest package of bmv (1.2-14.2 or later), as listed in Debian Security Advisory DSA-631-1. See References.

For other distributions:
Contact your vendor for upgrade or patch information.

References:

  • BID-12229: BMV Insecure Temporary File Vulnerability
  • CVE-2003-0014: gsinterf.c in bmv 1.2 and earlier allows local users to overwrite arbitrary files via a symlink attack on temporary files.
  • DSA-633: bmv -- insecure temporary file
  • OSVDB ID: 12863: BMV Symlink Arbitrary File Overwrite
  • SA13793: BMV Insecure Temporary File Creation
  • SECTRACK ID: 1012847: BMV Viewer Unsafe Temporary Files May Let Local Users Gain Elevated Privileges

Platforms Affected:

  • Debian Debian Linux 3.0
  • Peter Samuelson BMV

Reported:

Jan 11, 2005

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