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Date: Wed, 24 Jan 2024 19:15:49 +0100
From: Anton Luka Šijanec <>
Subject: Re: Re: darkhttpd: timing attack and local leak of HTTP basic auth credentials


I can see UID numbers in /proc/net/tcp6 as a non-root user even though my procfs is mounted with hidepid=invisible (ps aux only shows my processes). My system is Gentoo Linux with kernel 6.1.69. Peeking at the source, it looks like oidentd indeed reads from /proc/net/tcp6. I run oidentd on a system with hidepid=invisible and oidentd runs as a separate oidentd user and does work (tested by trying to connect to an IrcNet server).


On 24 January 2024 18:39:38 CET, wrote:
>Do not the various implementations of the *ident* protocol (example: oidentd)
>rely on this interface? They are often, or always, intentionally configured
>to run as nobody or a dedicated UID.

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