ubuntu-cve-2023-35838
Vulnerability from osv_ubuntu
Published
2023-08-09 23:15
Modified
2026-01-20 05:10
Summary
Details

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.

Severity
5.7 (Medium)
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "wireguard",
            "binary_version": "1.0.20200513-1~16.04.2"
          },
          {
            "binary_name": "wireguard-tools",
            "binary_version": "1.0.20200513-1~16.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "wireguard",
        "purl": "pkg:deb/ubuntu/wireguard@1.0.20200513-1~16.04.2?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.20200513-1~16.04.1",
        "1.0.20200513-1~16.04.2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "wireguard",
            "binary_version": "1.0.20200513-1~18.04.2"
          },
          {
            "binary_name": "wireguard-tools",
            "binary_version": "1.0.20200513-1~18.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "wireguard",
        "purl": "pkg:deb/ubuntu/wireguard@1.0.20200513-1~18.04.2?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.20200513-1~18.04.1",
        "1.0.20200513-1~18.04.2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "wireguard",
            "binary_version": "1.0.20200513-1~20.04.2"
          },
          {
            "binary_name": "wireguard-tools",
            "binary_version": "1.0.20200513-1~20.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "wireguard",
        "purl": "pkg:deb/ubuntu/wireguard@1.0.20200513-1~20.04.2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.0.20190913-1ubuntu1",
        "0.0.20191212-1ubuntu1",
        "0.0.20191219-1ubuntu1",
        "1.0.20200102-1ubuntu1",
        "1.0.20200121-1ubuntu1",
        "1.0.20200121-2ubuntu1",
        "1.0.20200206-1ubuntu1",
        "1.0.20200206-2ubuntu1",
        "1.0.20200319-1ubuntu1",
        "1.0.20200513-1~20.04.1",
        "1.0.20200513-1~20.04.2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "wireguard",
            "binary_version": "1.0.20210914-1ubuntu2"
          },
          {
            "binary_name": "wireguard-tools",
            "binary_version": "1.0.20210914-1ubuntu2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "wireguard",
        "purl": "pkg:deb/ubuntu/wireguard@1.0.20210914-1ubuntu2?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.20210424-1ubuntu1",
        "1.0.20210914-1ubuntu1",
        "1.0.20210914-1ubuntu2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "wireguard",
            "binary_version": "1.0.20210914-1ubuntu4"
          },
          {
            "binary_name": "wireguard-tools",
            "binary_version": "1.0.20210914-1ubuntu4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "wireguard",
        "purl": "pkg:deb/ubuntu/wireguard@1.0.20210914-1ubuntu4?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.20210914-1ubuntu3",
        "1.0.20210914-1ubuntu4"
      ]
    }
  ],
  "aliases": [],
  "details": "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.",
  "id": "UBUNTU-CVE-2023-35838",
  "modified": "2026-01-20T05:10:11Z",
  "published": "2023-08-09T23:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-35838"
    },
    {
      "type": "REPORT",
      "url": "https://tunnelcrack.mathyvanhoef.com/details.html"
    },
    {
      "type": "REPORT",
      "url": "https://papers.mathyvanhoef.com/usenix2023-tunnelcrack.pdf"
    },
    {
      "type": "REPORT",
      "url": "https://openvpn.net/security-advisory/statement-regarding-tunnelcrack-vulnerabilities/"
    },
    {
      "type": "REPORT",
      "url": "https://www.softether.org/9-about/News/905-TunnelCrack"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2023-35838"
    },
    {
      "type": "REPORT",
      "url": "https://security.paloaltonetworks.com/PAN-SA-2023-0004"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2023-35838"
  ]
}



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