Xtell TTY directory traversal

xtell-tty-directory-traversal (8313) The risk level is classified as LowLow Risk


The Xtell package could allow a remote attacker to traverse directories on the Web server. A remote attacker can request a URL that uses "dot dot" sequences (../) in the path to traverse directories and write to arbitrary TTY devices.


Gain Access


For Debian GNU/Linux 2.2 (potato):
Upgrade to the latest version of xtell (1.91.1 or later), as listed in DSA 121-1. See References.

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


  • BugTraq Mailing List, Wed Feb 27 2002 - 04:31:29 CST: Remote exploit against xtelld and other fun.
  • BID-4194: xtell Trusted TTY Device Name Remote Vulnerability
  • CVE-2002-0333: Directory traversal vulnerability in xtell (xtelld) 1.91.1 and earlier, and 2.x before 2.7, allows remote attackers to read files with short names, and local users to read more files using a symlink with a short name, via a .. in the TTY argument.
  • DSA-121: xtell -- buffer overflow
  • OSVDB ID: 9049: xtell TTY Argument Arbitrary File Access

Platforms Affected:

  • Debian Debian Linux 2.2
  • Xtell Xtell 2.6.1


Feb 27, 2002

The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall the author/distributor (IBM Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

For corrections or additions please email ignore thisxforceignore this@ignore thisus.ignore thisibm.comignore this

Return to the main page