Vulnerability in GNU Screen
CVE-2023-24626
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.005 (43.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- savannah.gnu.org/bugs/ (Permissions Required)
- git.savannah.gnu.org/cgit/screen.git/patch/ (Patch, Mailing List)
- www.exploit-db.com/exploits/51252 (VDB Entry, Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2023-24626?
- CVE-2023-24626 is a medium-severity vulnerability in GNU Screen, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 6.5/10. Published 2023-04-08.
- How severe is CVE-2023-24626?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2023-24626 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.