CVE-2018-20217 is a Reachable Assertion vulnerability affecting the KDC in MIT Kerberos 5 versions prior to 1.17, as well as Debian Linux and Debian Kerberos. An attacker who obtains a krbtgt ticket using older encryption types (single-DES, triple-DES, or RC4) can crash the KDC by making an S4U2Self request. This vulnerability has a CVSS score of 5.3 (Medium), indicating a network-based attack with high attack complexity and potential for high availability impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 5-1.17CPE matchmatch criteria | cpe:2.3:a:mit:kerberos:*:*:*:*:*:*:*:* | ||
8.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | ||
9.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
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