#VU28507 Improper Validation of Array Index in FreeRDP - CVE-2020-11041

Vulnerability identifier: #VU28507

Vulnerability risk: Low

CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-11041

CWE-ID: CWE-129

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
FreeRDP
Universal components / Libraries / Libraries used by multiple products

Vendor: FreeRDP

Description

The vulnerability allows a remote user to perform a denal of service (DoS) attack.

The vulnerability exists due to unchecked read of array offset in "rdpsnd_recv_wave2_pdu". A remote administrator can crash the client instance followed by no or distorted sound or a session disconnect.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

FreeRDP: 1.0 beta1 - 2.0.0

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External links
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-w67c-26c4-2h9w

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.