{"id":"DEBIAN-CVE-2010-4021","details":"The Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.7 does not properly restrict the use of TGT credentials for armoring TGS requests, which might allow remote authenticated users to impersonate a client by rewriting an inner request, aka a \"KrbFastReq forgery issue.\"","modified":"2026-09-18T06:47:38.453294786Z","published":"2010-12-02T16:22:21.240Z","upstream":["CVE-2010-4021"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2010-4021"}],"affected":[{"package":{"name":"krb5","ecosystem":"Debian:12","purl":"pkg:deb/debian/krb5?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8+dfsg~alpha1-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2010-4021.json"}},{"package":{"name":"krb5","ecosystem":"Debian:13","purl":"pkg:deb/debian/krb5?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8+dfsg~alpha1-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2010-4021.json"}},{"package":{"name":"krb5","ecosystem":"Debian:14","purl":"pkg:deb/debian/krb5?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8+dfsg~alpha1-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2010-4021.json"}}],"schema_version":"1.9.0"}