[Bug 2059739] Re: initramfs-tools 0.142ubuntu23 copies host /etc/passwd into initramfs

[Launchpad Bug Tracker]

This bug was fixed in the package initramfs-tools - 0.142ubuntu25

---------------
initramfs-tools (0.142ubuntu25) noble; urgency=medium

  * Copy only dhcpcd user into initramfs /etc/passwd (LP: #2059739)
  * autopkgtest: Ignore remainig udev processes also on amd64

 -- Benjamin Drung <bdrung at ubuntu.com>  Wed, 17 Apr 2024 17:55:09 +0200

** Changed in: initramfs-tools (Ubuntu)
       Status: Fix Committed => Fix Released

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to initramfs-tools in Ubuntu.
https://bugs.launchpad.net/bugs/2059739

Title:
  initramfs-tools 0.142ubuntu23 copies host /etc/passwd into initramfs

Status in initramfs-tools package in Ubuntu:
  Fix Released

Bug description:
  Recent changes to the dhcpd hook shipped with dhcpdinitramfs-tools 0.142ubuntu23 (noble-dev) copy the host /etc/passwd into the initramfs-image:
  https://git.launchpad.net/ubuntu/+source/initramfs-tools/commit/hooks/dhcpcd?h=applied/ubuntu/noble&id=73c865b9d234087d977d7baa20852639746567fd

  This has multiple problems:
   * The passwd file is copied without checking if the dhcpcd user actually exists (which is created by dhcpcd package, but only dhcpcd-base is installed via dependencies)
   * The change breaks dropbear-initramfs because the passwd file contains a root user with a non existing home directory
   * leaking user information into initramfs (which may or may not be a problem on fully encrypted systems)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/2059739/+subscriptions