{"id":"USN-6198-1","summary":"screen vulnerability","details":"It was discovered that GNU Screen was not properly checking user\nidentifiers before sending certain signals to target processes. If GNU\nScreen was installed as setuid or setgid, a local attacker could possibly\nuse this issue to cause a denial of service on a target application.\n","modified":"2026-02-10T04:43:11Z","published":"2023-07-03T12:53:20Z","related":["UBUNTU-CVE-2023-24626"],"upstream":["CVE-2023-24626","UBUNTU-CVE-2023-24626"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6198-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-24626"}],"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"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6198-1.json","cves_map":{"cves":[{"id":"CVE-2023-24626","severity":[{"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":"CVSS_V3"},{"score":"low","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:Pro:14.04:LTS"}}},{"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"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6198-1.json","cves_map":{"cves":[{"id":"CVE-2023-24626","severity":[{"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":"CVSS_V3"},{"score":"low","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:Pro:16.04:LTS"}}},{"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"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6198-1.json","cves_map":{"cves":[{"id":"CVE-2023-24626","severity":[{"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":"CVSS_V3"},{"score":"low","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:Pro:18.04:LTS"}}}],"schema_version":"1.7.3"}