CVE-2023-35838
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.
Does this matter?
Lower severity and a low EPSS score (0.69%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.7 MEDIUMCVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- EPSS
- 0.69% probability · 51th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-610
- Affected
- wireguard/wireguard
- Source
- cve@mitre.org
References
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2023-0015
- https://tunnelcrack.mathyvanhoef.com/details.htmlExploit, Third Party Advisory
- https://wireguard.comProduct
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2023-0015
- https://tunnelcrack.mathyvanhoef.com/details.htmlExploit, Third Party Advisory
- https://wireguard.comProduct
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.