Input validation error in Guacamole - CVE-2020-9497
Published: July 2, 2020 / Updated: July 15, 2020
Vulnerability identifier: #VU29481
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-9497
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerability details
The vulnerability allows a remote attacker to gain access to sensitive information on the system.
The vulnerability exists due to insufficient validation of user-supplied input of RDP static virtual channels. A remote attacker can use a specially crafted PDUs to disclose sensitive information within the memory of the guacd process handling the connection.
Affected software
Guacamole
Fedora
Ivanti Connect Secure (formerly Pulse Connect Secure)
guacamole-server
Fedora
Ivanti Connect Secure (formerly Pulse Connect Secure)
guacamole-server
How to mitigate CVE-2020-9497
Install updates from vendor's website.
Guacamole - update to 1.2.0
guacamole-server - addressed in versions 1.2.0-2.el7, 1.2.0-3.fc32, 1.2.0-3.fc33
guacamole-server - addressed in versions 1.2.0-2.el7, 1.2.0-3.fc32, 1.2.0-3.fc33