TkMail /tmp file symlink attack

tkmail-tmp-file-symlink (10307) The risk level is classified as MediumMedium Risk

Description:

TkMail is vulnerable to a symlink attack. TkMail creates temporary files insecurely. A local attacker could exploit this vulnerability by creating symbolic links from TkMail temporary files to other files on the system, which could be overwritten with the privileges of another TkMail user, once the user executes TkMail.


Consequences:

File Manipulation

Remedy:

For Debian GNU/Linux:
Upgrade to the appropriate tkmail packages, as listed below. Refer to DSA 172-1 for more information. See References.

Debian 2.2 (potato): 4.0beta9-4.1 or later
Debian 3.0 (woody): 4.0beta9-8.1 or later

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

References:

  • TkMail Web site: TkMail - a X Window Mail Reader.
  • BID-5911: TkMail Insecure Temporary Files Vulnerability
  • CVE-2002-1193: tkmail before 4.0beta9-8.1 allows local users to create or overwrite files as users via a symlink attack on temporary files.
  • DSA-172: tkmail -- insecure temporary files
  • OSVDB ID: 14506: TkMail Temp File Symlink Arbitrary File Manipulation

Platforms Affected:

  • Debian Debian Linux 2.2
  • Debian Debian Linux 3.0
  • Paul Raines TkMail prior to 4.0beta9-9

Reported:

Oct 08, 2002

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