{"id":"UBUNTU-CVE-2023-24626","details":"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.","modified":"2026-02-04T03:10:43.741096Z","published":"2023-04-08T05:15:00Z","related":["USN-6198-1","USN-7978-1"],"upstream":["CVE-2023-24626"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-24626"},{"type":"REPORT","url":"https://savannah.gnu.org/bugs/?63195"},{"type":"REPORT","url":"https://www.exploit-db.com/exploits/51252"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6198-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2023-24626"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7978-1"}],"affected":[{"package":{"name":"screen","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/screen@4.1.0~20120320gitdb59704-9ubuntu0.1~esm3?arch=source&distro=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0~20120320gitdb59704-9ubuntu0.1~esm3"}]}],"versions":["4.0.3-14ubuntu10","4.1.0~20120320gitdb59704-9","4.1.0~20120320gitdb59704-9ubuntu0.1~esm1","4.1.0~20120320gitdb59704-9ubuntu0.1~esm2"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_name":"screen","binary_version":"4.1.0~20120320gitdb59704-9ubuntu0.1~esm3"}],"priority_reason":"Ubuntu does not install screen setuid-root"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-24626.json"}},{"package":{"name":"screen","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/screen@4.3.1-2ubuntu0.1+esm1?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.1-2ubuntu0.1+esm1"}]}],"versions":["4.3.1-2","4.3.1-2build1","4.3.1-2ubuntu0.1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_name":"screen","binary_version":"4.3.1-2ubuntu0.1+esm1"}],"priority_reason":"Ubuntu does not install screen setuid-root"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-24626.json"}},{"package":{"name":"screen","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/screen@4.6.2-1ubuntu1.1+esm1?arch=source&distro=esm-infra/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.6.2-1ubuntu1.1+esm1"}]}],"versions":["4.6.1-1","4.6.2-1","4.6.2-1ubuntu1","4.6.2-1ubuntu1.1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_name":"screen","binary_version":"4.6.2-1ubuntu1.1+esm1"}],"priority_reason":"Ubuntu does not install screen setuid-root"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-24626.json"}},{"package":{"name":"screen","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/screen@4.8.0-1ubuntu0.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.6.2-3build1","4.7.0-1","4.8.0-1","4.8.0-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_version":"4.8.0-1ubuntu0.1","binary_name":"screen"}],"priority_reason":"Ubuntu does not install screen setuid-root"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-24626.json"}},{"package":{"name":"screen","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/screen@4.9.0-1ubuntu0.1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.9.0-1ubuntu0.1"}]}],"versions":["4.8.0-6","4.8.0-6build1","4.8.0-7","4.9.0-1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"screen","binary_version":"4.9.0-1ubuntu0.1"}],"priority_reason":"Ubuntu does not install screen setuid-root"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-24626.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}]}