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.
References (3)
Core 3
Core References
Exploit, Third Party Advisory
https://tunnelcrack.mathyvanhoef.com/details.html
Product
https://wireguard.com
Various Sources
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2023-0015
Scores
CVSS v3
5.7
EPSS
0.0081
EPSS Percentile
52.0%
Attack Vector
ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-610
Status
published
Products (1)
wireguard/wireguard
0.5.3
Published
Aug 09, 2023
Tracked Since
Feb 18, 2026