Vulnerability identifier: #VU59552
Vulnerability risk: Medium
CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2021-41767
CWE-ID:
CWE-200
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Guacamole
Server applications /
Remote management servers, RDP, SSH
Vendor: Apache Foundation
Description
The vulnerability allows a remote user to bypass implemented security restrictions.
The vulnerability exists due to the application includes a private tunnel identifier in the non-private details of some REST responses. A remote user can obtain the private tunnel identifier and use it to interact with another user's active use of that same connection.Mitigation
Install updates from vendor's website.
Vulnerable software versions
Guacamole: 0.8.3 - 1.3.0
External links
https://lists.apache.org/thread/5l31k4jmzdsfz0xt8osrbl878gb3b7ro
https://www.openwall.com/lists/oss-security/2022/01/11/6
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.