{"id":"ALPINE-CVE-2020-4042","details":"Bareos before version 19.2.8 and earlier allows a malicious client to communicate with the director without knowledge of the shared secret if the director allows client initiated connection and connects to the client itself. The malicious client can replay the Bareos director's cram-md5 challenge to the director itself leading to the director responding to the replayed challenge. The response obtained is then a valid reply to the directors original challenge. This is fixed in version 19.2.8.","modified":"2026-11-03T06:32:37.319716900Z","published":"2020-07-10T20:15:11.250Z","upstream":["CVE-2020-4042"],"references":[{"type":"ADVISORY","url":"https://security.alpinelinux.org/vuln/CVE-2020-4042"}],"affected":[{"package":{"name":"bareos","ecosystem":"Alpine:v3.13","purl":"pkg:apk/alpine/bareos?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"19.2.8-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-4042.json"}},{"package":{"name":"bareos","ecosystem":"Alpine:v3.14","purl":"pkg:apk/alpine/bareos?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"19.2.8-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-4042.json"}},{"package":{"name":"bareos","ecosystem":"Alpine:v3.15","purl":"pkg:apk/alpine/bareos?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"19.2.8-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-4042.json"}},{"package":{"name":"bareos","ecosystem":"Alpine:v3.16","purl":"pkg:apk/alpine/bareos?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"19.2.8-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-4042.json"}},{"package":{"name":"bareos","ecosystem":"Alpine:v3.17","purl":"pkg:apk/alpine/bareos?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"19.2.8-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-4042.json"}},{"package":{"name":"bareos","ecosystem":"Alpine:v3.18","purl":"pkg:apk/alpine/bareos?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"19.2.8-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-4042.json"}},{"package":{"name":"bareos","ecosystem":"Alpine:v3.19","purl":"pkg:apk/alpine/bareos?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"19.2.8-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-4042.json"}},{"package":{"name":"bareos","ecosystem":"Alpine:v3.20","purl":"pkg:apk/alpine/bareos?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"19.2.8-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-4042.json"}},{"package":{"name":"bareos","ecosystem":"Alpine:v3.21","purl":"pkg:apk/alpine/bareos?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"19.2.8-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-4042.json"}},{"package":{"name":"bareos","ecosystem":"Alpine:v3.22","purl":"pkg:apk/alpine/bareos?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"19.2.8-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-4042.json"}},{"package":{"name":"bareos","ecosystem":"Alpine:v3.23","purl":"pkg:apk/alpine/bareos?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"19.2.8-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-4042.json"}},{"package":{"name":"bareos","ecosystem":"Alpine:v3.24","purl":"pkg:apk/alpine/bareos?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"19.2.8-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-4042.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N"}]}