* Add G408: SSH PublicKeyCallback Authentication Bypass Analyzer
Implements a new SSA-based security analyzer (G408) that detects
stateful misuse of ssh.PublicKeyCallback in SSH server configurations.
This vulnerability can lead to authentication bypass where a server
authenticates one SSH key but performs authorization checks on a
different key.
This addresses a critical security vulnerability (CVE-2024-45337, CVSS
9.1) that has affected production systems including Kubernetes and other
SSH-based services. The vulnerability occurs when developers incorrectly
capture and modify state within PublicKeyCallback closures, enabling
attackers to authenticate with one key while the server operates on
another key's credentials.
Signed-off-by: Cosmin Cojocar <cosmin@cojocar.ch>
* Fix tests
Signed-off-by: Cosmin Cojocar <cosmin@cojocar.ch>
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Signed-off-by: Cosmin Cojocar <cosmin@cojocar.ch>
