CRITICAL

CVE-2022-41924

CVSS v3

9.6

CRITICAL

EPSS Score

53.6%

exploit probability

CISA KEV

No

known exploited

Exploitation

SSVC status

Description

A vulnerability identified in the Tailscale Windows client allows a malicious website to reconfigure the Tailscale daemon `tailscaled`, which can then be used to remotely execute code. In the Tailscale Windows client, the local API was bound to a local TCP socket, and communicated with the Windows client GUI in cleartext with no Host header verification. This allowed an attacker-controlled website visited by the node to rebind DNS to an attacker-controlled DNS server, and then make local API requests in the client, including changing the coordination server to an attacker-controlled coordination server. An attacker-controlled coordination server can send malicious URL responses to the client, including pushing executables or installing an SMB share. These allow the attacker to remotely execute code on the node. All Windows clients prior to version v.1.32.3 are affected. If you are running Tailscale on Windows, upgrade to v1.32.3 or later to remediate the issue.

Technical details

Published
11/23/2022

Frequently asked questions

What is CVE-2022-41924?

A vulnerability identified in the Tailscale Windows client allows a malicious website to reconfigure the Tailscale daemon `tailscaled`, which can then be used to remotely execute code. In the Tailscale Windows client, the local API was bound to a local TCP socket, and communicated with the Windows client GUI in cleartext with no Host header verification. This allowed an attacker-controlled website visited by the node to rebind DNS to an attacker-controlled DNS server, and then make local API requests in the client, including changing the coordination server to an attacker-controlled coordination server. An attacker-controlled coordination server can send malicious URL responses to the client, including pushing executables or installing an SMB share. These allow the attacker to remotely execute code on the node. All Windows clients prior to version v.1.32.3 are affected. If you are running Tailscale on Windows, upgrade to v1.32.3 or later to remediate the issue.

Is CVE-2022-41924 actively exploited?

Active exploitation of CVE-2022-41924 has not been confirmed. The EPSS score is 53.6%, indicating the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2022-41924?

CVE-2022-41924 has a CVSS v3 base score of 9.6 (CRITICAL severity).

Is CVE-2022-41924 affecting your environment?

Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.