CVE-2023-24626 is a medium-severity vulnerability affecting GNU Screen versions up to 4.9.0, particularly when installed with setuid/setgid permissions (common on Arch Linux and FreeBSD). This flaw allows a local attacker to send a privileged SIGHUP signal to any process ID, leading to a denial of service or disruption of the target process. While not actively exploited in the wild and lacking significant community discussion or media coverage, a public exploit (EDB-51252) exists, demonstrating privilege escalation. The CVSS score of 6.5 reflects its local attack vector, low complexity, and high impact on availability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 4.9.0CPE matchmatch criteria | cpe:2.3:a:gnu:screen:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
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.
Apr 11, 2023screen: allows sending SIGHUP to arbitrary PIDs
Apr 8, 2023