Multiple vulnerabilities in Apache Guacamole



Published: 2020-07-02
Risk High
Patch available YES
Number of vulnerabilities 2
CVE ID CVE-2020-9497
CVE-2020-9498
CWE ID CWE-20
CWE-824
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Public exploit code for vulnerability #2 is available.
Vulnerable software
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Guacamole
Web applications / Remote management & hosting panels

Vendor Apache Foundation

Security Advisory

1) Input validation error

Risk: Medium

CVSSv3.1: 5.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-9497

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: Yes

Description

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.  

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Guacamole: 0.8.3, 0.8.4, 0.9.0, 0.9.1, 0.9.2, 0.9.3, 0.9.4, 0.9.5, 0.9.6, 0.9.7, 0.9.8, 0.9.9, 0.9.10, 0.9.11, 0.9.12, 0.9.13, 0.9.14, 1.0.0, 1.1.0

CPE External links

http://seclists.org/oss-sec/2020/q3/2

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

2) Access of Uninitialized Pointer

Risk: High

CVSSv3.1: 7.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-9498

CWE-ID: CWE-824 - Access of Uninitialized Pointer

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to execute arbitrary code on the system.

The vulnerability exists due to the affected software mishandles pointers involved in processing data received via RDP static virtual channels. A remote attacker can use a specially crafted PDUs and execute arbitrary code on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Guacamole: 0.8.3, 0.8.4, 0.9.0, 0.9.1, 0.9.2, 0.9.3, 0.9.4, 0.9.5, 0.9.6, 0.9.7, 0.9.8, 0.9.9, 0.9.10, 0.9.11, 0.9.12, 0.9.13, 0.9.14, 1.0.0, 1.1.0

CPE External links

http://seclists.org/oss-sec/2020/q3/3

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.



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