[ubuntu/jammy-security] screen 4.9.0-1ubuntu0.1 (Accepted)

[Marc Deslauriers]

screen (4.9.0-1ubuntu0.1) jammy-security; urgency=medium

  * SECURITY UPDATE: can send privileged SIGHUP signals to any process
    - debian/patches/CVE-2023-24626.patch: fix missing signal sending
      permission check on failed query messages in socket.c.
    - CVE-2023-24626
  * SECURITY UPDATE: incorrect PTY permissions
    - debian/patches/CVE-2025-46802.patch: prevent temporary 0666 mode on
      PTYs in attacher.c, screen.c.
    - CVE-2025-46802
  * SECURITY UPDATE: minor information leak
    - debian/patches/CVE-2025-46804.patch: avoid file existence test
      information leaks in screen.c, socket.c.
    - CVE-2025-46804
  * SECURITY UPDATE: TOCTOU allowing to send SIGHUP, SIGCONT
    - debian/patches/CVE-2025-46805.patch: don't send signals with root
      privileges in socket.c.
    - CVE-2025-46805

Date: 2026-01-22 20:29:11.364992+00:00
Changed-By: Marc Deslauriers <marc.deslauriers at canonical.com>
https://launchpad.net/ubuntu/+source/screen/4.9.0-1ubuntu0.1
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