CVEvulnerability

CVE-2026-25791

7.5 HIGH Published 2026-02-09 Modified 2026-06-17 Official page ↗
Status
Analyzed
Published
2026-02-09
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-306, CWE-400

Description

Sliver is a command and control framework that uses a custom Wireguard netstack. Prior to 1.7.0, the DNS C2 listener accepts unauthenticated TOTP bootstrap messages and allocates server-side DNS sessions without validating OTP values, even when EnforceOTP is enabled. Because sessions are stored without a cleanup/expiry path in this flow, an unauthenticated remote actor can repeatedly create sessions and drive memory exhaustion. This vulnerability is fixed in 1.7.0.

Affected configurations

• bishopfox sliver (< 1.7.0)

Related

Weakness · CWE (2)

  • CWE-306 Missing Authentication for Critical Functionality weakness
  • CWE-400 Uncontrolled Resource Consumption weakness

References