CVE-2021-41159

Improper client input validation for FreeRDP gateway connections allows to overwrite memory

Description

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. All FreeRDP clients prior to version 2.4.1 using gateway connections (`/gt:rpc`) fail to validate input data. A malicious gateway might allow client memory to be written out of bounds. This issue has been resolved in version 2.4.1. If you are unable to update then use `/gt:http` rather than /gt:rdp connections if possible or use a direct connection without a gateway.

Category

5.8
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.06%
Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org
Affected: FreeRDP FreeRDP
Published at:
Updated at:

References

Link Tags
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-vh34-m9h7-95xq third party advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DWJXQOWKNR7O5HM2HFJOM4GBUFPTE3RG/ vendor advisory
https://security.gentoo.org/glsa/202210-24 third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-41159?
CVE-2021-41159 has been scored as a medium severity vulnerability.
How to fix CVE-2021-41159?
To fix CVE-2021-41159, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-41159 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-41159 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-41159?
CVE-2021-41159 affects FreeRDP FreeRDP.
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