CVE-2018-20217
- Source
- https://cve.org/CVERecord?id=CVE-2018-20217
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-20217.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2018-20217
- Downstream
- Related
- Published
- 2018-12-26T21:29:02.543Z
- Modified
- 2026-06-18T04:04:22.919680194Z
- Severity
-
- 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- 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.
- Database specific
{ "unresolved_ranges": [ { "source": "CPE_RANGE", "cpes": [ "cpe:2.3:a:mit:kerberos:*:*:*:*:*:*:*:*" ], "extracted_events": [ { "fixed": "5-1.17" } ], "vendor_product": "mit:kerberos" }, { "source": "CPE_STRING", "cpes": [ "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*", "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*" ], "extracted_events": [ { "last_affected": "8.0" }, { "last_affected": "9.0" } ], "vendor_product": "debian:debian_linux" } ] }- References
-
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2KNHELH4YHNT6H2ESJWX2UIDXLBNGB2O/
- https://lists.debian.org/debian-lts-announce/2019/01/msg00020.html
- https://lists.debian.org/debian-lts-announce/2021/09/msg00019.html
- https://security.netapp.com/advisory/ntap-20190416-0006/
- http://krbdev.mit.edu/rt/Ticket/Display.html?id=8763
- https://github.com/krb5/krb5/commit/5e6d1796106df8ba6bc1973ee0917c170d929086