{"id":"ALPINE-CVE-2021-37750","details":"The Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.18.5 and 1.19.x before 1.19.3 has a NULL pointer dereference in kdc/do_tgs_req.c via a FAST inner body that lacks a server field.","modified":"2026-03-09T01:22:51.119983Z","published":"2021-08-23T05:15:08.063Z","upstream":["CVE-2021-37750"],"references":[{"type":"ADVISORY","url":"https://security.alpinelinux.org/vuln/CVE-2021-37750"}],"affected":[{"package":{"name":"krb5","ecosystem":"Alpine:v3.12","purl":"pkg:apk/alpine/krb5?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.5-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","1.15.4-r0","1.15.5-r0","1.17-r0","1.17.1-r0","1.18-r0","1.18.1-r0","1.18.2-r0","1.18.3-r0","1.18.4-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-37750.json"}},{"package":{"name":"krb5","ecosystem":"Alpine:v3.13","purl":"pkg:apk/alpine/krb5?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.5-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","1.15.4-r0","1.15.5-r0","1.17-r0","1.17.1-r0","1.18-r0","1.18.1-r0","1.18.2-r0","1.18.3-r0","1.18.3-r1","1.18.4-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-37750.json"}},{"package":{"name":"krb5","ecosystem":"Alpine:v3.14","purl":"pkg:apk/alpine/krb5?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.5-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","1.15.4-r0","1.15.5-r0","1.17-r0","1.17.1-r0","1.18-r0","1.18.1-r0","1.18.2-r0","1.18.3-r0","1.18.3-r1","1.18.4-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-37750.json"}},{"package":{"name":"krb5","ecosystem":"Alpine:v3.15","purl":"pkg:apk/alpine/krb5?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.19.3-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","1.15.4-r0","1.15.5-r0","1.17-r0","1.17.1-r0","1.18-r0","1.18.1-r0","1.18.2-r0","1.18.3-r0","1.18.3-r1","1.18.4-r0","1.19.2-r0","1.19.2-r1","1.19.2-r2","1.19.2-r3","1.19.2-r4"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-37750.json"}},{"package":{"name":"krb5","ecosystem":"Alpine:v3.16","purl":"pkg:apk/alpine/krb5?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.19.3-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","1.15.4-r0","1.15.5-r0","1.17-r0","1.17.1-r0","1.18-r0","1.18.1-r0","1.18.2-r0","1.18.3-r0","1.18.3-r1","1.18.4-r0","1.19.2-r0","1.19.2-r1","1.19.2-r2","1.19.2-r3","1.19.2-r4"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-37750.json"}},{"package":{"name":"krb5","ecosystem":"Alpine:v3.17","purl":"pkg:apk/alpine/krb5?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.19.3-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","1.15.4-r0","1.15.5-r0","1.17-r0","1.17.1-r0","1.18-r0","1.18.1-r0","1.18.2-r0","1.18.3-r0","1.18.3-r1","1.18.4-r0","1.19.2-r0","1.19.2-r1","1.19.2-r2","1.19.2-r3","1.19.2-r4"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-37750.json"}},{"package":{"name":"krb5","ecosystem":"Alpine:v3.18","purl":"pkg:apk/alpine/krb5?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.19.3-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","1.15.4-r0","1.15.5-r0","1.17-r0","1.17.1-r0","1.18-r0","1.18.1-r0","1.18.2-r0","1.18.3-r0","1.18.3-r1","1.18.4-r0","1.19.2-r0","1.19.2-r1","1.19.2-r2","1.19.2-r3","1.19.2-r4"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-37750.json"}},{"package":{"name":"krb5","ecosystem":"Alpine:v3.19","purl":"pkg:apk/alpine/krb5?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.19.3-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","1.15.4-r0","1.15.5-r0","1.17-r0","1.17.1-r0","1.18-r0","1.18.1-r0","1.18.2-r0","1.18.3-r0","1.18.3-r1","1.18.4-r0","1.19.2-r0","1.19.2-r1","1.19.2-r2","1.19.2-r3","1.19.2-r4"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-37750.json"}},{"package":{"name":"krb5","ecosystem":"Alpine:v3.20","purl":"pkg:apk/alpine/krb5?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.19.3-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","1.15.4-r0","1.15.5-r0","1.17-r0","1.17.1-r0","1.18-r0","1.18.1-r0","1.18.2-r0","1.18.3-r0","1.18.3-r1","1.18.4-r0","1.19.2-r0","1.19.2-r1","1.19.2-r2","1.19.2-r3","1.19.2-r4"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-37750.json"}},{"package":{"name":"krb5","ecosystem":"Alpine:v3.21","purl":"pkg:apk/alpine/krb5?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.19.3-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","1.15.4-r0","1.15.5-r0","1.17-r0","1.17.1-r0","1.18-r0","1.18.1-r0","1.18.2-r0","1.18.3-r0","1.18.3-r1","1.18.4-r0","1.19.2-r0","1.19.2-r1","1.19.2-r2","1.19.2-r3","1.19.2-r4"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-37750.json"}},{"package":{"name":"krb5","ecosystem":"Alpine:v3.22","purl":"pkg:apk/alpine/krb5?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.19.3-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","1.15.4-r0","1.15.5-r0","1.17-r0","1.17.1-r0","1.18-r0","1.18.1-r0","1.18.2-r0","1.18.3-r0","1.18.3-r1","1.18.4-r0","1.19.2-r0","1.19.2-r1","1.19.2-r2","1.19.2-r3","1.19.2-r4"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-37750.json"}},{"package":{"name":"krb5","ecosystem":"Alpine:v3.23","purl":"pkg:apk/alpine/krb5?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.19.3-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","1.15.4-r0","1.15.5-r0","1.17-r0","1.17.1-r0","1.18-r0","1.18.1-r0","1.18.2-r0","1.18.3-r0","1.18.3-r1","1.18.4-r0","1.19.2-r0","1.19.2-r1","1.19.2-r2","1.19.2-r3","1.19.2-r4"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-37750.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}