mIRC PRIVMSG Handling Remote Buffer Overflow

High Nessus Plugin ID 34471


The remote host contains a chat client that is affected by a buffer overflow vulnerability.


The version of mIRC installed on the remote host is earlier than 6.35 and thus reportedly prone to a buffer overflow attack that can be triggered by a long hostname in a PRIVMSG message. If an attacker can trick a user into connecting to a malicious IRC server (perhaps via JavaScript in an HTML document), this issue could be leveraged to execute arbitrary code on the remote host subject to the user's privileges.


Upgrade to mIRC 6.35 or later.

See Also


Plugin Details

Severity: High

ID: 34471

File Name: mirc_6_35.nasl

Version: $Revision: 1.13 $

Type: local

Agent: windows

Family: Windows

Published: 2008/10/22

Modified: 2016/11/28

Dependencies: 34470

Risk Information

Risk Factor: High


Base Score: 9.3

Temporal Score: 8.4

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

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

Vulnerability Information

Required KB Items: SMB/mIRC/Version

Exploit Available: true

Exploit Ease: Exploits are available

Exploitable With

Core Impact

Metasploit (mIRC PRIVMSG Handling Stack Buffer Overflow)

Reference Information

CVE: CVE-2008-4449

BID: 31552

EDB-ID: 6654, 6666

OSVDB: 48752

CWE: 119