CVE-2018-20217

CVSS V2 Low 3.5 CVSS V3 Medium 5.3
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.
Overview
  • CVE ID
  • CVE-2018-20217
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2018-12-26T21:29:02
  • Last Modified Date
  • 2021-10-18T12:03:56
Weakness Enumerations
CWE URL
CWE-617 http://cwe.mitre.org/data/definitions/617.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:mit:kerberos:*:*:*:*:*:*:*:* 1 OR 5-1.17
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:M/Au:S/C:N/I:N/A:P
  • Access Vector
  • NETWORK
  • Access Compatibility
  • MEDIUM
  • Authentication
  • SINGLE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • NONE
  • Availability Impact
  • PARTIAL
  • Base Score
  • 3.5
  • Severity
  • LOW
  • Exploitability Score
  • 6.8
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • HIGH
  • Privileges Required
  • LOW
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • HIGH
  • Base Score
  • 5.3
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 1.6
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2KNHELH4YHNT6H2ESJWX2UIDXLBNGB2O/ Third Party Advisory
https://github.com/krb5/krb5/commit/5e6d1796106df8ba6bc1973ee0917c170d929086 Patch Third Party Advisory
http://krbdev.mit.edu/rt/Ticket/Display.html?id=8763 Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/01/msg00020.html Mailing List Third Party Advisory
https://security.netapp.com/advisory/ntap-20190416-0006/ Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/09/msg00019.html Mailing List Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2018-20217
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20217
History
Created Old Value New Value Data Type Notes
2022-05-10 06:51:25 Added to TrackCVE
2022-12-03 15:47:21 2018-12-26T21:29Z 2018-12-26T21:29:02 CVE Published Date updated
2022-12-03 15:47:21 2021-10-18T12:03:56 CVE Modified Date updated
2022-12-03 15:47:21 Analyzed Vulnerability Status updated