Command injection in mIRC - CVE-2019-6453
Published: February 20, 2019 / Updated: June 17, 2021
Vulnerability identifier: #VU17806
CSH Severity: High
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-6453
CWE-ID: CWE-77
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary commands on the target system.
The weakness exists due to argument injection through custom URI protocol handlers. A remote attacker can trick the victim into visiting a specially crafted web-page and specify an irc:// URI that loads an arbitrary .ini file from a UNC share pathname to inject arbitrary commands and execute arbitrary code with elevated privileges.
Successful exploitation of the vulnerability may result in system compromise.
The weakness exists due to argument injection through custom URI protocol handlers. A remote attacker can trick the victim into visiting a specially crafted web-page and specify an irc:// URI that loads an arbitrary .ini file from a UNC share pathname to inject arbitrary commands and execute arbitrary code with elevated privileges.
Successful exploitation of the vulnerability may result in system compromise.
Affected software
mIRC
How to mitigate CVE-2019-6453
Update to version 7.55.
mIRC - update to 7.55