Critical Security Vulnerability in FreeRDP: Heap Buffer Overflows and Use-After-Free Issues
Summary
RLSA-2026:6340: Important: freerdp security update. Affects freerdp versions < 2:2.11.7-1.el9_7.5. Fixed in 2:2.11.7-1.el9_7.5. How to fix ↓
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Background
FreeRDP is an open-source implementation of the Remote Desktop Protocol (RDP), allowing users to connect to remote servers and desktops. It is widely used for accessing Windows machines, xrdp, and VirtualBox environments. The package is released under the Apache license and is known for its flexibility and performance. However, recent vulnerabilities have exposed it to significant security risks, necessitating immediate attention from users and administrators.
Vulnerability Detail
The vulnerabilities in FreeRDP stem from multiple heap-use-after-free and heap-buffer-overflow issues, which can lead to arbitrary code execution, denial of service, and potential data breaches. Specifically, these vulnerabilities arise from improper memory management in various components of the FreeRDP client, such as the video timer and input event handling. Attackers can exploit these flaws by sending crafted RDP server messages, leading to severe consequences for affected systems.
How To Fix
Minimum fixed version
2:2.11.7-1.el9_7.5
This is the first release that contains the fix.
sudo dnf update freerdpTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary measure, users can limit access to FreeRDP by restricting network connections to trusted sources only. Additionally, disabling features that rely on RDP until the patch is applied may help mitigate risks.
Conclusion
The recent vulnerabilities in FreeRDP pose significant risks to users and systems relying on this protocol for remote access. It is crucial to apply the necessary updates to mitigate these risks and ensure the security of your systems. Regular monitoring and vulnerability assessments are recommended to maintain a secure environment.
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FAQ
FreeRDP is an open-source implementation of the Remote Desktop Protocol (RDP) that allows users to connect to remote desktops and servers.
The main vulnerabilities include heap-use-after-free and heap-buffer-overflow issues, which can lead to arbitrary code execution and denial of service.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
The CVSS score of this vulnerability is 8.8, indicating a high severity level.
You can update FreeRDP by running the command 'sudo dnf update freerdp' in your terminal.
References
Related vulnerabilities
Recent vulnerabilities recorded for freerdp.
