CrowdStrike Falcon Sensor on Linux TLS Certificate Validation improper following of a certificate's chain of trust

Summaryinfo

A vulnerability, which was classified as problematic, was found in CrowdStrike Falcon Sensor, Falcon Kubernetes Admission Controller and Falcon Container Sensor on Linux. This affects an unknown function of the component TLS Certificate Validation Handler. Such manipulation leads to improper following of a certificate's chain of trust. This vulnerability is documented as CVE-2025-1146. The attack can be executed remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in CrowdStrike Falcon Sensor, Falcon Kubernetes Admission Controller and Falcon Container Sensor on Linux (affected version not known) and classified as problematic. Affected by this issue is some unknown functionality of the component TLS Certificate Validation Handler. The manipulation with an unknown input leads to a improper following of a certificate's chain of trust vulnerability. Using CWE to declare the problem leads to CWE-296. The product does not follow, or incorrectly follows, the chain of trust for a certificate back to a trusted root certificate, resulting in incorrect trust of any resource that is associated with that certificate. Impacted is integrity. CVE summarizes:

CrowdStrike uses industry-standard TLS (transport layer security) to secure communications from the Falcon sensor to the CrowdStrike cloud. CrowdStrike has identified a validation logic error in the Falcon sensor for Linux, Falcon Kubernetes Admission Controller, and Falcon Container Sensor where our TLS connection routine to the CrowdStrike cloud can incorrectly process server certificate validation. This could allow an attacker with the ability to control network traffic to potentially conduct a man-in-the-middle (MiTM) attack. CrowdStrike identified this issue internally and released a security fix in all Falcon sensor for Linux, Falcon Kubernetes Admission Controller, and Falcon Container Sensor versions 7.06 and above. CrowdStrike identified this issue through our longstanding, rigorous security review process, which has been continually strengthened with deeper source code analysis and ongoing program enhancements as part of our commitment to security resilience. CrowdStrike has no indication of any exploitation of this issue in the wild. CrowdStrike has leveraged its world class threat hunting and intelligence capabilities to actively monitor for signs of abuse or usage of this flaw and will continue to do so. Windows and Mac sensors are not affected by this.

The advisory is shared for download at crowdstrike.com. This vulnerability is handled as CVE-2025-1146 since 02/10/2025. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1557.003.

Upgrading eliminates this vulnerability.

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Productinfo

Type

• Virtualization Software

Vendor

• CrowdStrike

Name

• Falcon Container Sensor
• Falcon Kubernetes Admission Controller
• Falcon Sensor

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