Trillian IRC User Mode Numeric Remote Overflow

High Nessus Network Monitor Plugin ID 1866


The remote host is vulnerable to a buffer overflow.


The remote host is running the Trillian IRC client. Trillian versions 0.73, 0.74, and possibly other versions are vulnerable to a buffer overflow, caused by improper validation of Internet Relay Chat (IRC) raw 221 user mode requests. By sending a raw 221 request with a mode of more than 251 bytes, a remote attacker in control of a malicious IRC server could overflow a buffer and cause the victim's Trillian client to crash or execute code on the system.


Upgrade or patch according to vendor recommendations.

Plugin Details

Severity: High

ID: 1866

File Name: 1866.prm

Family: IRC Clients

Published: 2004/08/20

Modified: 2016/11/23

Dependencies: 1878

Risk Information

Risk Factor: High


Base Score: 7.5

Temporal Score: 7.1

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Temporal Vector: CVSS2#E:F/RL:U/RC:ND


Base Score: 7.3

Temporal Score: 7.1


Temporal Vector: CVSS3#E:F/RL:U/RC:X

Reference Information

CVE: CVE-2002-1486

BID: 5769, 5765, 5777

OSVDB: 10796, 10797