mIRC < 6.1 DCC Server Protocol Nickname Disclosure

Medium Nessus Network Monitor Plugin ID 1862


The remote host may give an attacker information useful for future attacks.


The remote host is running the mIRC chat client. A vulnerability has been reported in the mIRC implementation of the DCC protocol. Reportedly, when a DCC connection is initiated, the command '100 testing' will cause the mIRC server to respond with the user's current nick. Exploitation of this vulnerability may aid an attack in further intelligent attacks, or help an attempt at social engineering.


Upgrade to version 6.1 or higher.

Plugin Details

Severity: Medium

ID: 1862

Family: IRC Clients

Published: 2004/08/20

Modified: 2016/11/23

Dependencies: 1878

Risk Information

Risk Factor: Medium


Base Score: 5

Temporal Score: 5

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

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


Base Score: 5.3

Temporal Score: 5.3


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

Reference Information

CVE: CVE-2002-0425

BID: 4247