Reachable Assertion Affecting krb5 package, versions <1.15.4-r0
Threat Intelligence
EPSS
0.24% (63rd
percentile)
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Test your applications- Snyk ID SNYK-ALPINE317-KRB5-3140023
- published 26 Dec 2018
- disclosed 26 Dec 2018
Introduced: 26 Dec 2018
CVE-2018-20217 Open this link in a new tabHow to fix?
Upgrade Alpine:3.17 krb5 to version 1.15.4-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream krb5 package and not the krb5 package as distributed by Alpine.
See How to fix? for Alpine:3.17 relevant fixed versions and status.
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.
References
- http://krbdev.mit.edu/rt/Ticket/Display.html?id=8763
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20217
- https://lists.debian.org/debian-lts-announce/2019/01/msg00020.html
- https://security-tracker.debian.org/tracker/CVE-2018-20217
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2KNHELH4YHNT6H2ESJWX2UIDXLBNGB2O/
- https://github.com/krb5/krb5/commit/5e6d1796106df8ba6bc1973ee0917c170d929086
- https://lists.debian.org/debian-lts-announce/2021/09/msg00019.html
- https://security.netapp.com/advisory/ntap-20190416-0006/
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2018-20217
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2KNHELH4YHNT6H2ESJWX2UIDXLBNGB2O/
CVSS Scores
version 3.1