CVE-2018-20217
At a glance
- Source
- NVD
- EPSS
- EPSS 1.42 % · percentile 73 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- mitre
- NVD status
- Modified
Description
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.
Weaknesses (CWE)
- CWE-617 — Reachable Assertion
References
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2KNHELH4YHNT6H2ESJWX2UIDXLBNGB2O/
- http://krbdev.mit.edu/rt/Ticket/Display.html?id=8763
- https://github.com/krb5/krb5/commit/5e6d1796106df8ba6bc1973ee0917c170d929086
- https://lists.debian.org/debian-lts-announce/2019/01/msg00020.html
- https://security.netapp.com/advisory/ntap-20190416-0006/
- https://lists.debian.org/debian-lts-announce/2021/09/msg00019.html
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.3 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 2.0 | LOW 3.5 | AV:N/AC:M/Au:S/C:N/I:N/A:P | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2018-12784
- GCVE · GCVE-0-2018-20217
CERT-FR advisories
- CERTFR-2020-AVI-691 — Multiples vulnérabilités dans les produits Juniper · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:mit:kerberos:*:*:*:*:*:*:*:*< 5-1.17cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| affected n/a |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |