CVEvulnerability

CVE-2023-35838

5.7 MEDIUM Published 2023-08-09 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2023-08-09
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.7 MEDIUM — CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weaknesses
CWE-610

Description

The WireGuard client 0.5.3 on Windows insecurely configures the operating system and firewall such that traffic to a local network that uses non-RFC1918 IP addresses is blocked. This allows an adversary to trick the victim into blocking IP traffic to selected IP addresses and services even while the VPN is enabled. NOTE: the tunnelcrack.mathyvanhoef.com website uses this CVE ID to refer more generally to "LocalNet attack resulting in the blocking of traffic" rather than to only WireGuard.

Affected configurations

• wireguard wireguard 0.5.3

Related

Weakness · CWE (1)

  • CWE-610 Externally Controlled Reference to a Resource in Another Sphere weakness

References