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CVE-2024-6387: RCE in OpenSSH's server, on glibc-based Linux systems (seclists.org)

submitted 4 months ago by 0x0@programming.dev to c/security@programming.dev

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Regression in signal handler.

This vulnerability is exploitable remotely on glibc-based Linux systems, where syslog() itself calls async-signal-unsafe functions (for example, malloc() and free()): an unauthenticated remote code execution as root, because it affects sshd's privileged code, which is not sandboxed and runs with full privileges.

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[–] rushaction@programming.dev 4 points 4 months ago

Because this is a regression and this particular issue was introduced in 8.5p1. So it only affects versions newer than that, up until when it was fixed in 9.8p1.