FreeRDP is a free implementation of the Remote Desktop Protocol. A vulnerability has been identified in versions prior to 3.20.1 due to a race condition in the serial channel IRP thread tracking. This condition allows a heap use‑after‑free scenario when one thread removes an entry from serial->IrpThreads while another reads it. The vulnerability has been addressed in version 3.20.1.
The CVSS score for this vulnerability is 6.8, indicating a medium severity level. This score is significant as it reflects the potential impact on confidentiality, integrity, and availability, which are all rated as high. Organizations utilizing FreeRDP should be aware of this vulnerability and take necessary actions to mitigate any potential risks.
Risk to organizations includes unauthorized access to sensitive information and potential disruption of services due to the exploitation of this vulnerability. The exploitability status indicates that a proof of concept is available, but there is no confirmed active exploitation in the wild.
Organizations should prioritize patching immediately to prevent any potential exploitation of this vulnerability. The urgency is underscored by the high impact on critical systems that utilize FreeRDP.
Vulnerability Details
The vulnerability is classified as a use-after-free flaw, specifically identified under CWE-362 and CWE-416. The affected product is FreeRDP, with vulnerabilities present in all versions prior to 3.20.1. The vulnerability was published on January 14, 2026, and has been analyzed by the security community.
Technical Analysis
The root cause of this vulnerability lies in the improper handling of thread operations within the FreeRDP serial channel. The attack vector for this flaw is network-based, requiring no privileges to exploit, and user interaction is passive, meaning the user does not need to be aware of the attack.
The complexity of the attack is high, which may limit the number of potential attackers. However, the impacts on confidentiality, integrity, and availability are significant, with all rated high, indicating that successful exploitation could lead to severe consequences.
Risk & Impact Analysis
The potential impact of this vulnerability is considerable, particularly for organizations that rely on FreeRDP for remote desktop services. The implications include unauthorized access to sensitive data and potential service disruption. Given the medium CVSS score, organizations should assess their exposure and prioritize remediation efforts.
With an EPS score of 0.00067, this vulnerability is in the lower percentile of risk, but it remains important for organizations to remain vigilant, as the lack of active exploitation does not negate the risk.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions prior to 3.20.1 of FreeRDP are vulnerable to this issue. Users should ensure they are running the latest version to mitigate the associated risks.
Mitigation & Remediation
To mitigate this vulnerability, organizations should upgrade FreeRDP to version 3.20.1 or later. If immediate upgrading is not possible, consider implementing network controls to limit access to affected systems.
Organizations should also consider implementing security testing practices to regularly assess the security posture of their applications. More information on effective security practices can be found in our penetration testing services.
Detection Guidance
Monitoring logs for unusual behavior, especially around remote desktop usage, can help identify potential exploitation attempts related to this vulnerability. Organizations should look for unexpected thread management or memory access patterns.
AppSecure Threat Intelligence Insight
The presence of this vulnerability highlights the ongoing challenges in secure remote access implementations. Organizations should reflect on their security strategies and consider employing comprehensive assessment methodologies to identify and remediate similar vulnerabilities. Engaging in a vulnerability management program can significantly enhance the defensive posture against such threats. Additionally, regular training on secure coding practices is essential for developers to avoid introducing similar vulnerabilities in future releases.
For more insights on security testing best practices, organizations can refer to our penetration testing methodology and explore how to effectively assess their security landscape.
In conclusion, staying informed about vulnerabilities and their implications is crucial for maintaining a secure environment. Organizations should not only address immediate threats but also invest in long-term security improvements.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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