SB2023060680 - Multiple vulnerabilities in Apache Guacamole

Description

This security bulletin contains information about 2 vulnerabilities.

1) Input validation error (CVE-ID: CVE-2023-30575)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote user to bypass implemented security restrictions.

The vulnerability exists due to incorrectly calculate the lengths of instruction elements sent during the Guacamole protocol handshake. A remote user can pass specially crafted input to the application and inject Guacamole instructions during the handshake.

2) Use-after-free (CVE-ID: CVE-2023-30576)

CWE-ID: CWE-416 - Use After Free

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote user to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when handling RDP audio input buffer. A remote user can trigger a use-after-free error and execute arbitrary code on the system.

Remediation

Install update from vendor's website.

References

• https://lists.apache.org/thread/tn63n2lon0h5p45oft834t1dqvvxownv
• https://lists.apache.org/thread/vgtvxb3w7mm84hx6v8dfc0onsoz05gb6