{"id":"ALPINE-CVE-2020-14367","details":"A flaw was found in chrony versions before 3.5.1 when creating the PID file under the /var/run/chrony folder. The file is created during chronyd startup while still running as the root user, and when it's opened for writing, chronyd does not check for an existing symbolic link with the same file name. This flaw allows an attacker with privileged access to create a symlink with the default PID file name pointing to any destination file in the system, resulting in data loss and a denial of service due to the path traversal.","modified":"2026-09-11T10:17:51.382917998Z","published":"2020-08-24T15:15:13.147Z","upstream":["CVE-2020-14367"],"references":[{"type":"ADVISORY","url":"https://security.alpinelinux.org/vuln/CVE-2020-14367"}],"affected":[{"package":{"name":"chrony","ecosystem":"Alpine:v3.10","purl":"pkg:apk/alpine/chrony?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.1-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-14367.json"}},{"package":{"name":"chrony","ecosystem":"Alpine:v3.11","purl":"pkg:apk/alpine/chrony?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.1-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-14367.json"}},{"package":{"name":"chrony","ecosystem":"Alpine:v3.12","purl":"pkg:apk/alpine/chrony?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.1-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-14367.json"}},{"package":{"name":"chrony","ecosystem":"Alpine:v3.13","purl":"pkg:apk/alpine/chrony?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.1-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-14367.json"}},{"package":{"name":"chrony","ecosystem":"Alpine:v3.14","purl":"pkg:apk/alpine/chrony?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.1-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-14367.json"}},{"package":{"name":"chrony","ecosystem":"Alpine:v3.15","purl":"pkg:apk/alpine/chrony?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.1-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-14367.json"}},{"package":{"name":"chrony","ecosystem":"Alpine:v3.16","purl":"pkg:apk/alpine/chrony?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.1-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-14367.json"}},{"package":{"name":"chrony","ecosystem":"Alpine:v3.17","purl":"pkg:apk/alpine/chrony?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.1-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-14367.json"}},{"package":{"name":"chrony","ecosystem":"Alpine:v3.18","purl":"pkg:apk/alpine/chrony?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.1-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-14367.json"}},{"package":{"name":"chrony","ecosystem":"Alpine:v3.19","purl":"pkg:apk/alpine/chrony?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.1-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-14367.json"}},{"package":{"name":"chrony","ecosystem":"Alpine:v3.20","purl":"pkg:apk/alpine/chrony?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.1-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-14367.json"}},{"package":{"name":"chrony","ecosystem":"Alpine:v3.21","purl":"pkg:apk/alpine/chrony?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.1-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-14367.json"}},{"package":{"name":"chrony","ecosystem":"Alpine:v3.22","purl":"pkg:apk/alpine/chrony?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.1-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-14367.json"}},{"package":{"name":"chrony","ecosystem":"Alpine:v3.23","purl":"pkg:apk/alpine/chrony?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.1-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-14367.json"}},{"package":{"name":"chrony","ecosystem":"Alpine:v3.24","purl":"pkg:apk/alpine/chrony?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.1-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-14367.json"}},{"package":{"name":"chrony","ecosystem":"Alpine:v3.9","purl":"pkg:apk/alpine/chrony?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4-r2"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-14367.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H"}]}