CVE-2018-20217

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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
2026-05-16T11:53:49.351896511Z
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": [
        {
            "cpes": [
                "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
                "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
            ],
            "source": "CPE_FIELD",
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
                {
                    "last_affected": "8.0"
                },
                {
                    "last_affected": "9.0"
                }
            ]
        },
        {
            "cpes": [
                "cpe:2.3:a:mit:kerberos:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "mit:kerberos",
            "source": "CPE_FIELD",
            "extracted_events": [
                {
                    "fixed": "5-1.17"
                }
            ]
        }
    ]
}
References

Affected packages