rustsec-2026-0121
Vulnerability from osv_rustsec
Published
2026-05-05 12:00
Modified
2026-05-06 13:41
Summary
Denial of service in Steamworks game clients/servers using P2P authentication
Details

Processing the raw ValidateAuthTicketResponse_t callback data panics when the m_eAuthSessionResponse field is k_EAuthSessionResponseAuthTicketNetworkIdentityFailure. This can lead to denial of service in game clients and servers using the begin_authentication_session API to authenticate players if a malicious game client sends an authentication ticket with a network identity that does not match that of the verifier.

References
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{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "denial-of-service"
        ],
        "cvss": null,
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [
            "steamworks::Client::process_callbacks",
            "steamworks::Client::register_callback",
            "steamworks::Server::begin_authentication_session",
            "steamworks::User::begin_authentication_session",
            "steamworks::ValidateAuthTicketResponse::from_raw"
          ],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "steamworks",
        "purl": "pkg:cargo/steamworks"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "0.13.1"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "Processing the raw `ValidateAuthTicketResponse_t` callback data panics when the `m_eAuthSessionResponse` field is `k_EAuthSessionResponseAuthTicketNetworkIdentityFailure`. This can lead to denial of service in game clients and servers using the `begin_authentication_session` API to authenticate players if a malicious game client sends an authentication ticket with a network identity that does not match that of the verifier.",
  "id": "RUSTSEC-2026-0121",
  "modified": "2026-05-06T13:41:21Z",
  "published": "2026-05-05T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/steamworks"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2026-0121.html"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/Noxime/steamworks-rs/issues/321"
    }
  ],
  "related": [],
  "severity": [],
  "summary": "Denial of service in Steamworks game clients/servers using P2P authentication"
}


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