{"id":"ALPINE-CVE-2018-20217","details":"A Reachable Assertion issue was discovered in the KDC in MIT Kerberos 5 (aka krb5) before 1.17. If an attacker can obtain a krbtgt ticket using an older encryption type (single-DES, triple-DES, or RC4), the attacker can crash the KDC by making an S4U2Self request.","modified":"2026-03-09T01:12:53.144626Z","published":"2018-12-26T21:29:02.543Z","upstream":["CVE-2018-20217"],"references":[{"type":"ADVISORY","url":"https://security.alpinelinux.org/vuln/CVE-2018-20217"}],"affected":[{"package":{"name":"krb5","ecosystem":"Alpine:v3.10","purl":"pkg:apk/alpine/krb5?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.15.4-r0"}]}],"versions":["1.11-r0","1.11-r1","1.11-r2","1.11.2-r0","1.11.2-r1","1.11.2-r2","1.11.3-r0","1.11.4-r0","1.12.1-r0","1.12.2-r0","1.13-r0","1.13-r1","1.13.1-r0","1.13.1-r1","1.13.2-r0","1.13.2-r1","1.13.2-r2","1.14-r0","1.14-r1","1.14-r2","1.14.3-r0","1.14.3-r1","1.14.3-r2","1.15.1-r0","1.15.2-r0","1.15.2-r1","1.15.2-r2","1.15.3-r0","1.15.3-r1"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2018-20217.json"}},{"package":{"name":"krb5","ecosystem":"Alpine:v3.11","purl":"pkg:apk/alpine/krb5?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.15.4-r0"}]}],"versions":["1.11-r0","1.11-r1","1.11-r2","1.11.2-r0","1.11.2-r1","1.11.2-r2","1.11.3-r0","1.11.4-r0","1.12.1-r0","1.12.2-r0","1.13-r0","1.13-r1","1.13.1-r0","1.13.1-r1","1.13.2-r0","1.13.2-r1","1.13.2-r2","1.14-r0","1.14-r1","1.14-r2","1.14.3-r0","1.14.3-r1","1.14.3-r2","1.15.1-r0","1.15.2-r0","1.15.2-r1","1.15.2-r2","1.15.3-r0","1.15.3-r1"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2018-20217.json"}},{"package":{"name":"krb5","ecosystem":"Alpine:v3.12","purl":"pkg:apk/alpine/krb5?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.15.4-r0"}]}],"versions":["1.11-r0","1.11-r1","1.11-r2","1.11.2-r0","1.11.2-r1","1.11.2-r2","1.11.3-r0","1.11.4-r0","1.12.1-r0","1.12.2-r0","1.13-r0","1.13-r1","1.13.1-r0","1.13.1-r1","1.13.2-r0","1.13.2-r1","1.13.2-r2","1.14-r0","1.14-r1","1.14-r2","1.14.3-r0","1.14.3-r1","1.14.3-r2","1.15.1-r0","1.15.2-r0","1.15.2-r1","1.15.2-r2","1.15.3-r0","1.15.3-r1"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2018-20217.json"}},{"package":{"name":"krb5","ecosystem":"Alpine:v3.13","purl":"pkg:apk/alpine/krb5?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.15.4-r0"}]}],"versions":["1.11-r0","1.11-r1","1.11-r2","1.11.2-r0","1.11.2-r1","1.11.2-r2","1.11.3-r0","1.11.4-r0","1.12.1-r0","1.12.2-r0","1.13-r0","1.13-r1","1.13.1-r0","1.13.1-r1","1.13.2-r0","1.13.2-r1","1.13.2-r2","1.14-r0","1.14-r1","1.14-r2","1.14.3-r0","1.14.3-r1","1.14.3-r2","1.15.1-r0","1.15.2-r0","1.15.2-r1","1.15.2-r2","1.15.3-r0","1.15.3-r1"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2018-20217.json"}},{"package":{"name":"krb5","ecosystem":"Alpine:v3.14","purl":"pkg:apk/alpine/krb5?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.15.4-r0"}]}],"versions":["1.11-r0","1.11-r1","1.11-r2","1.11.2-r0","1.11.2-r1","1.11.2-r2","1.11.3-r0","1.11.4-r0","1.12.1-r0","1.12.2-r0","1.13-r0","1.13-r1","1.13.1-r0","1.13.1-r1","1.13.2-r0","1.13.2-r1","1.13.2-r2","1.14-r0","1.14-r1","1.14-r2","1.14.3-r0","1.14.3-r1","1.14.3-r2","1.15.1-r0","1.15.2-r0","1.15.2-r1","1.15.2-r2","1.15.3-r0","1.15.3-r1"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2018-20217.json"}},{"package":{"name":"krb5","ecosystem":"Alpine:v3.15","purl":"pkg:apk/alpine/krb5?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.15.4-r0"}]}],"versions":["1.11-r0","1.11-r1","1.11-r2","1.11.2-r0","1.11.2-r1","1.11.2-r2","1.11.3-r0","1.11.4-r0","1.12.1-r0","1.12.2-r0","1.13-r0","1.13-r1","1.13.1-r0","1.13.1-r1","1.13.2-r0","1.13.2-r1","1.13.2-r2","1.14-r0","1.14-r1","1.14-r2","1.14.3-r0","1.14.3-r1","1.14.3-r2","1.15.1-r0","1.15.2-r0","1.15.2-r1","1.15.2-r2","1.15.3-r0","1.15.3-r1"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2018-20217.json"}},{"package":{"name":"krb5","ecosystem":"Alpine:v3.16","purl":"pkg:apk/alpine/krb5?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.15.4-r0"}]}],"versions":["1.11-r0","1.11-r1","1.11-r2","1.11.2-r0","1.11.2-r1","1.11.2-r2","1.11.3-r0","1.11.4-r0","1.12.1-r0","1.12.2-r0","1.13-r0","1.13-r1","1.13.1-r0","1.13.1-r1","1.13.2-r0","1.13.2-r1","1.13.2-r2","1.14-r0","1.14-r1","1.14-r2","1.14.3-r0","1.14.3-r1","1.14.3-r2","1.15.1-r0","1.15.2-r0","1.15.2-r1","1.15.2-r2","1.15.3-r0","1.15.3-r1"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2018-20217.json"}},{"package":{"name":"krb5","ecosystem":"Alpine:v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