CVE-2023-22466

Tokio is a runtime for writing applications with Rust. Starting with version 1.7.0 and prior to versions 1.18.4, 1.20.3, and 1.23.1, when 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. Remote clients may only access the named pipe if the named pipe's associated path is accessible via a publicly shared folder (SMB). Versions 1.23.1, 1.20.3, and 1.18.4 have been patched. The fix will also be present in all releases starting from version 1.24.0. Named pipes were introduced to Tokio in version 1.7.0, so releases older than 1.7.0 are not affected. As a workaround, ensure that `pipe_mode` is set first after initializing a `ServerOptions`.

• CWE-665

• https://github.com/tokio-rs/tokio/pull/5336Patch, Third Party Advisory
• https://github.com/tokio-rs/tokio/releases/tag/tokio-1.23.1Release Notes, Third Party Advisory
• https://github.com/tokio-rs/tokio/security/advisories/GHSA-7rrj-xr53-82p7Mitigation, Third Party Advisory
• https://learn.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-createnamedpipea#pipe_reject_remote_clientsTechnical Description, Third Party Advisory
• https://github.com/tokio-rs/tokio/pull/5336Patch, Third Party Advisory
• https://github.com/tokio-rs/tokio/releases/tag/tokio-1.23.1Release Notes, Third Party Advisory
• https://github.com/tokio-rs/tokio/security/advisories/GHSA-7rrj-xr53-82p7Mitigation, Third Party Advisory
• https://learn.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-createnamedpipea#pipe_reject_remote_clientsTechnical Description, Third Party Advisory

Published

Jan 4, 2023

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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