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
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 |
Ignored
(end of life, was 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
- https://savannah.gnu.org/bugs/?63195 (private)
- https://git.savannah.gnu.org/cgit/screen.git/patch/?id=e9ad41bfedb4537a6f0de20f00b27c7739f168f7
- https://www.exploit-db.com/exploits/51252
- https://ubuntu.com/security/notices/USN-6198-1
- https://www.cve.org/CVERecord?id=CVE-2023-24626
- NVD
- Launchpad
- Debian