#VU80403 Integer underflow in FreeRDP - CVE-2023-39350

Vulnerability identifier: #VU80403

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-39350

CWE-ID: CWE-191

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 perform a denial of service (DoS) attack.

The vulnerability exists due to integer underflow caused by incorrect offset calculation. A remote attacker can send specially crafted data to the affected application, trigger an integer underflow and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

FreeRDP: 2.0.0 rc0 - 3.0.0 beta2

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External links
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-rrrv-3w42-pffh
https://github.com/FreeRDP/FreeRDP/commit/e204fc8be5a372626b13f66daf2abafe71dbc2dc

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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.