CVE-2026-54590: ronf asyncssh, заобикаляне на вход и права

Описание

Оригинално описание

AsyncSSH is a Python package which provides an asynchronous client and server implementation of the SSHv2 protocol on top of the Python asyncio framework. Version 2.23.0 contains an incomplete fix for CVE-2026-45309 in SSHServerConfig._set_tokens that blocks /, , and .. before %u substitution in AuthorizedKeysFile but does not block a leading ~ or ${ENV}, allowing later expansion in _expand_val and Path(filename).expanduser() to escape the intended authorized-keys directory. This issue is fixed in version 2.23.1.

Засегнати продукти

• ronf asyncssh: < 2.23.1

Вид слабост

• CWE-22 Неправилно ограничаване на път до позволена директория
• CWE-639 Authorization Bypass Through User-Controlled Key

История

Други уязвимости в ronf asyncssh

• 6.5CVE-2026-62949
• 8.2CVE-2026-45309
• 8.1CVE-2026-54591

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-54590
• https://nvd.nist.gov/vuln/detail/CVE-2026-54590
• https://github.com/ronf/asyncssh/security/advisories/GHSA-qr67-gv47-xwwh
• https://github.com/ronf/asyncssh/commit/3d515ba9ba0cd9990d248bdf62bcf05d51261a88
• https://github.com/ronf/asyncssh/releases/tag/v2.23.1