CVE-2019-6453 : Security Advisory and Response

CVE-2019-6453 is a vulnerability in mIRC that allows for remote command execution through custom URI protocol handlers before version 7.55. This exploit relies on argument injection, enabling attackers to load arbitrary .ini files from UNC share pathnames.

Understanding CVE-2019-6453

Before version 7.55, mIRC had a vulnerability that could be exploited for remote command execution by manipulating custom URI protocol handlers.

What is CVE-2019-6453?

Vulnerability in mIRC allowing remote command execution via argument injection
Attackers can specify an irc:// URI to load .ini files from chosen UNC share pathnames
Exploitation success depends on how browsers handle URIs, with Chrome being an exception

The Impact of CVE-2019-6453

Allows attackers to execute remote commands on vulnerable systems
Potential for unauthorized access and data manipulation

Technical Details of CVE-2019-6453

This section provides more in-depth technical information about the vulnerability.

Vulnerability Description

mIRC before version 7.55 is susceptible to remote command execution through custom URI protocol handlers.

Affected Systems and Versions

Product: mIRC
Vendor: N/A
Versions affected: Before 7.55

Exploitation Mechanism

Attackers exploit argument injection via custom URI protocol handlers
By specifying an irc:// URI, attackers can load .ini files from UNC share pathnames

Mitigation and Prevention

Protecting systems from CVE-2019-6453 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update mIRC to version 7.55 or newer to mitigate the vulnerability
Avoid clicking on suspicious or untrusted irc:// URIs

Long-Term Security Practices

Regularly update software and applications to patch known vulnerabilities
Implement browser security measures to handle URIs safely

Patching and Updates

Stay informed about security updates for mIRC and apply patches promptly