#VU69594 Out-of-bounds read in FreeRDP - CVE-2022-39316

Vulnerability identifier: #VU69594

Vulnerability risk: Medium

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-39316

CWE-ID: CWE-125

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 attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in ZGFX decoder. A malicious server can trick a FreeRDP based client to read out of bound data and try to decode it.

Successful exploitation of the vulnerability may allows remote code execution.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

FreeRDP: 2.0.0 rc0 - 2.8.1

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External links
https://github.com/FreeRDP/FreeRDP/commit/e865c24efc40ebc52e75979c94cdd4ee2c1495b0
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-5w4j-mrrh-jjrm

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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.