Multiple vulnerabilities in Apache Guacamole
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2021-43999 CVE-2021-41767 |
| CWE-ID | CWE-285 CWE-200 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Guacamole Server applications / Remote management servers, RDP, SSH |
| Vendor | Apache Foundation |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Improper Authorization
EUVDB-ID: #VU59553
Risk: Medium
CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-43999
CWE-ID:
CWE-285 - Improper Authorization
Exploit availability: No
DescriptionThe vulnerability allows a remote user to bypass authorization process.
The vulnerability exist due to improper validation responses, received from a SAML identity provider. A remote user can assume identity of another Guacamole user, is SAML support is enabled.
Install updates from vendor's website.
Vulnerable software versionsGuacamole: 1.2.0 - 1.3.0
External linkshttp://lists.apache.org/thread/4dt9h5mo4o9rxlgxm3rp8wfqdtdjn2z9
http://www.openwall.com/lists/oss-security/2022/01/11/7
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Information disclosure
EUVDB-ID: #VU59552
Risk: Medium
CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-41767
CWE-ID:
CWE-200 - Information exposure
Exploit availability: No
DescriptionThe 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. MitigationInstall updates from vendor's website.
Vulnerable software versionsGuacamole: 0.8.3 - 1.3.0
External linkshttp://lists.apache.org/thread/5l31k4jmzdsfz0xt8osrbl878gb3b7ro
http://www.openwall.com/lists/oss-security/2022/01/11/6
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
