{"id":"CVE-2023-22466","aliases":["GHSA-7rrj-xr53-82p7","RUSTSEC-2023-0001"],"url":"https://o3.security/vulnerability/CVE-2023-22466","summary":"Tokio's reject_remote_clients configuration may get dropped when creating a Windows named pipe","details":"### Impact\n\nWhen configuring a Windows named pipe server, setting `pipe_mode` will reset `reject_remote_clients` to `false`. If the application has previously configured `reject_remote_clients` to `true`, this effectively undoes the configuration. This also applies if `reject_remote_clients` is not explicitly set as this is the default configuration and is cleared by calling `pipe_mode`.\n\nRemote clients may only access the named pipe if the named pipe's associated path is accessible via a publically shared folder (SMB).\n\n### Patches\n\nThe following versions have been patched:\n* 1.23.1\n* 1.20.3\n* 1.18.4\n\nThe fix will also be present in all releases starting from version 1.24.0.\n\nNamed pipes were introduced to Tokio in version 1.7.0, so releases older than 1.7.0 are not affected.\n\n### Workarounds\n\nEnsure that `pipe_mode` is set **first** after initializing a `ServerOptions`. For example:\n\n```rust\nlet mut opts = ServerOptions::new();\nopts.pipe_mode(PipeMode::Message);\nopts.reject_remote_clients(true);\n```\n\n### References\n\nhttps://learn.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-createnamedpipea#pipe_reject_remote_clients\n","published":"2023-01-04T21:47:09.400Z","modified":"2026-08-12T03:51:42.651828514Z","cvss":{"score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"crates.io","name":"tokio","fixedVersion":"1.18.4"},{"ecosystem":"crates.io","name":"tokio","fixedVersion":"1.20.3"},{"ecosystem":"crates.io","name":"tokio","fixedVersion":"1.23.1"}],"fix":{"url":"https://github.com/tokio-rs/tokio/pull/5336","label":"tokio-rs/tokio#5336"},"references":[{"type":"WEB","url":"https://github.com/tokio-rs/tokio/releases/tag/tokio-1.23.1"},{"type":"WEB","url":"https://learn.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-createnamedpipea#pipe_reject_remote_clients"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/22xxx/CVE-2023-22466.json"},{"type":"ADVISORY","url":"https://github.com/tokio-rs/tokio/security/advisories/GHSA-7rrj-xr53-82p7"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-22466"},{"type":"FIX","url":"https://github.com/tokio-rs/tokio/pull/5336"},{"type":"PACKAGE","url":"https://github.com/tokio-rs/tokio"},{"type":"WEB","url":"https://rustsec.org/advisories/RUSTSEC-2023-0001.html"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:42.651828514Z"}}