medium5.3
CVE-2018-20217
A Reachable Assertion issue was discovered in the KDC in MIT Kerberos 5 (aka krb5) before 1.17.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mit | Kerberos | before 5-1.17 |
| Debian | Debian Linux | Versions 8.0, 9.0 |
Weakness classification
References
- NVD record
- CVE.org record
- 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://lists.debian.org/debian-lts-announce/2021/09/msg00019.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2KNHELH4YHNT6H2ESJWX2UIDXLBNGB2O/
- 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
- https://lists.debian.org/debian-lts-announce/2019/01/msg00020.html
- https://lists.debian.org/debian-lts-announce/2021/09/msg00019.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2KNHELH4YHNT6H2ESJWX2UIDXLBNGB2O/
- https://security.netapp.com/advisory/ntap-20190416-0006/