linux-kernel - utmp Format

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <54294c74eaa90ba149089c6aa49dd798@eggplantsd.com>
Date: Thu, 01 Aug 2024 12:41:48 -0400
From: support@...plantsd.com
To: linux-kernel@...r.kernel.org
Subject: utmp Format

I've noticed a difference in the size of the `utmp` struct between Linux 
6.1.0-22-amd64 and 6.1.0-23-cloud-arm64.  No doubt there are differences 
between other unices as well.  Is there a reason this is still a binary 
log?  On 6.1.0-22-amd64, it seems to be 384 bytes long, while the 
average line length from `utmpdump` is only 125 bytes, so it's not a 
space savings.

My primary concern is forensics.  There is no consistent and reliable 
way to read wtmp/btmp outside of the installation that created it.

JS