Multiple vulnerabilities in Apache Guacamole



Published: 2023-06-06 | Updated: 2024-02-01
Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2023-30575
CVE-2023-30576
CWE-ID CWE-20
CWE-416
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) Input validation error

EUVDB-ID: #VU86013

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-30575

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Guacamole: before 1.5.2

External links

http://lists.apache.org/thread/tn63n2lon0h5p45oft834t1dqvvxownv


Q & A

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.

2) Use-after-free

EUVDB-ID: #VU86014

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-30576

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Guacamole: 0.9.10 - 1.5.1

External links

http://lists.apache.org/thread/vgtvxb3w7mm84hx6v8dfc0onsoz05gb6


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.



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