ID CVE-2008-4449
Summary Stack-based buffer overflow in mIRC 6.34 allows remote attackers to execute arbitrary code via a long hostname in a PRIVMSG message.
Vulnerable Configurations
  • cpe:2.3:a:mirc:mirc:6.34
Base: 9.3 (as of 07-10-2008 - 11:44)
  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.
  • Overflow Binary Resource File
    An attack of this type exploits a buffer overflow vulnerability in the handling of binary resources. Binary resources may include music files like MP3, image files like JPEG files, and any other binary file. These attacks may pass unnoticed to the client machine through normal usage of files, such as a browser loading a seemingly innocent JPEG file. This can allow the attacker access to the execution stack and execute arbitrary code in the target process. This attack pattern is a variant of standard buffer overflow attacks using an unexpected vector (binary files) to wrap its attack and open up a new attack vector. The attacker is required to either directly serve the binary content to the victim, or place it in a locale like a MP3 sharing application, for the victim to download. The attacker then is notified upon the download or otherwise locates the vulnerability opened up by the buffer overflow.
  • Buffer Overflow via Symbolic Links
    This type of attack leverages the use of symbolic links to cause buffer overflows. An attacker can try to create or manipulate a symbolic link file such that its contents result in out of bounds data. When the target software processes the symbolic link file, it could potentially overflow internal buffers with insufficient bounds checking.
  • Overflow Variables and Tags
    This type of attack leverages the use of tags or variables from a formatted configuration data to cause buffer overflow. The attacker crafts a malicious HTML page or configuration file that includes oversized strings, thus causing an overflow.
  • Buffer Overflow via Parameter Expansion
    In this attack, the target software is given input that the attacker knows will be modified and expanded in size during processing. This attack relies on the target software failing to anticipate that the expanded data may exceed some internal limit, thereby creating a buffer overflow.
  • Buffer Overflow in an API Call
    This attack targets libraries or shared code modules which are vulnerable to buffer overflow attacks. An attacker who has access to an API may try to embed malicious code in the API function call and exploit a buffer overflow vulnerability in the function's implementation. All clients that make use of the code library thus become vulnerable by association. This has a very broad effect on security across a system, usually affecting more than one software process.
  • Buffer Overflow in Local Command-Line Utilities
    This attack targets command-line utilities available in a number of shells. An attacker can leverage a vulnerability found in a command-line utility to escalate privilege to root.
exploit-db via4
  • description mIRC 6.34 Remote Buffer Overflow Exploit. CVE-2008-4449. Remote exploit for windows platform
    file exploits/windows/remote/
    id EDB-ID:6666
    last seen 2016-02-01
    modified 2008-10-04
    platform windows
    published 2008-10-04
    reporter SkD
    title mIRC 6.34 - Remote Buffer Overflow Exploit
    type remote
  • description mIRC. CVE-2008-4449. Remote exploit for windows platform
    id EDB-ID:16422
    last seen 2016-02-01
    modified 2010-06-22
    published 2010-06-22
    reporter metasploit
    title mIRC <= 6.34 PRIVMSG Handling Stack Buffer Overflow
  • description mIRC 6.34 Remote Buffer Overflow PoC. CVE-2008-4449. Dos exploit for windows platform
    file exploits/windows/dos/
    id EDB-ID:6654
    last seen 2016-02-01
    modified 2008-10-02
    platform windows
    published 2008-10-02
    reporter securfrog
    title mIRC 6.34 - Remote Buffer Overflow PoC
    type dos
metasploit via4
description This module exploits a buffer overflow in the mIRC IRC Client v6.34 and earlier. By enticing a mIRC user to connect to this server module, an excessively long PRIVMSG command can be sent, overwriting the stack. Due to size restrictions, ordinal payloads may be necessary. This module is based on the code by SkD.
last seen 2019-03-26
modified 2017-11-08
published 2009-07-15
reliability Normal
reporter Rapid7
title mIRC PRIVMSG Handling Stack Buffer Overflow
nessus via4
NASL family Windows
description 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.
last seen 2019-02-21
modified 2018-11-15
plugin id 34471
published 2008-10-22
reporter Tenable
title mIRC PRIVMSG Handling Remote Buffer Overflow
packetstorm via4
data source
last seen 2016-12-05
published 2009-11-26
reporter patrick
title mIRC <= 6.34 PRIVMSG Handling Stack Overflow
refmap via4
bid 31552
  • 6654
  • 6666
secunia 32102
sreason 4352
vupen ADV-2008-2736
xf mirc-privmsg-bo(45624)
saint via4
bid 31552
description mIRC PRIVMSG hostname buffer overflow
id misc_mircver
osvdb 48752
title mirc_privmsg_hostname
type client
Last major update 07-03-2011 - 22:12
Published 06-10-2008 - 15:56
Last modified 28-09-2017 - 21:32
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