CVE-2018-20217
3.5 Low
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:S/C:N/I:N/A:P
5.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
5.3 Medium
AI Score
Confidence
High
0.003 Low
EPSS
Percentile
70.0%
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 configurations
| CPE | Name | Operator | Version |
|---|---|---|---|
| mit:kerberos | mit kerberos | lt | 5-1.17 |
References
krbdev.mit.edu/rt/Ticket/Display.html?id=8763
github.com/krb5/krb5/commit/5e6d1796106df8ba6bc1973ee0917c170d929086
lists.debian.org/debian-lts-announce/2019/01/msg00020.html
lists.debian.org/debian-lts-announce/2021/09/msg00019.html
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2KNHELH4YHNT6H2ESJWX2UIDXLBNGB2O/
security.netapp.com/advisory/ntap-20190416-0006/
Related
3.5 Low
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:S/C:N/I:N/A:P
5.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
5.3 Medium
AI Score
Confidence
High
0.003 Low
EPSS
Percentile
70.0%