CVE-2023-24626

Published: 8 April 2023

socket.c in GNU Screen through 4.9.0, when installed setuid or setgid (the default on platforms such as Arch Linux and FreeBSD), allows local users to send a privileged SIGHUP signal to any PID, causing a denial of service or disruption of the target process.

Notes

Author	Note
rodrigo-zaiden	debian does not use setuid or setgid for screen by default

Priority

Cvss 3 Severity Score

6.5

Score breakdown

Status

Package	Release	Status
screen Launchpad, Ubuntu, Debian	bionic	Released (4.6.2-1ubuntu1.1+esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
	focal	Needs triage
	jammy	Needs triage
	kinetic	Ignored (end of life, was needs-triage)
	lunar	Ignored (end of life, was needs-triage)
	mantic	Needs triage
	noble	Needs triage
	trusty	Released (4.1.0~20120320gitdb59704-9ubuntu0.1~esm3) Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
	upstream	Pending (5.0.0)
	xenial	Released (4.3.1-2ubuntu0.1+esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
	Patches: upstream: https://git.savannah.gnu.org/cgit/screen.git/commit/?id=e9ad41bfedb4537a6f0de20f00b27c7739f168f7

Severity score breakdown

Parameter	Value
Base score	6.5
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Changed
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

References

Bugs

https://savannah.gnu.org/bugs/?63195

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