Light with specially-crafted channel name allows remote attacker to execute script code

light-channel-execute-script (9943) The risk level is classified as HighHigh Risk


Light could allow a remote attacker to execute malicious script code on another user's system by tricking the user into joining a channel with embedded EPIC4 script code in the channel name.


Gain Privileges


Upgrade to the latest versions of Light (2.7.30p5 or later) and (2.8pre10 or later), as listed in the BugTraq Mailing List posting dated Thu Aug 22 2002 - 14:06:50 CDT. See References.

For Debian GNU/Linux 3.0 (woody):
Upgrade to the latest epic4-script-light package ( 2.7.30p5 or later), as listed in DSA-156-1. See References.

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


  • BugTraq Mailing List, Thu Aug 22 2002 - 14:06:50 CDT : Light Security Advisory: Remotely-exploitable code execution .
  • BID-5555: Light Channel Name Arbitrary Command Execution Vulnerability
  • CVE-2002-0984: The IRC script included in Light 2.7.x before 2.7.30p5, and 2.8.x before 2.8pre10, running EPIC allows remote attackers to execute arbitrary code if the user joins a channel whose topic includes EPIC4 code.
  • DSA-156: epic4-script-light -- arbitrary script execution
  • OSVDB ID: 5040: Light IRC Script Channel Name Arbitrary Code Execution

Platforms Affected:

  • Debian Debian Linux 3.0
  • J. S. Connell Light prior to 2.7.30p5
  • J. S. Connell Light prior to 2.8pre10


Aug 22, 2002

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