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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.62%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 9.6 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
- EPSS
- 1.62% probability · 75th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-346, CWE-352
- Affected
- tailscale/tailscale
- Source
- security-advisories@github.com
References
- https://emily.id.au/tailscaleExploit, Technical Description, Third Party Advisory
- https://github.com/tailscale/tailscale/security/advisories/GHSA-vqp6-rc3h-83cpThird Party Advisory
- https://tailscale.com/security-bulletins/#ts-2022-004Vendor Advisory
- https://emily.id.au/tailscaleExploit, Technical Description, Third Party Advisory
- https://github.com/tailscale/tailscale/security/advisories/GHSA-vqp6-rc3h-83cpThird Party Advisory
- https://tailscale.com/security-bulletins/#ts-2022-004Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.