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
5.4 Medium
AI Score
Confidence
High
3.5 Low
CVSS2
Access Vector
NETWORK
Access 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
0.003 Low
EPSS
Percentile
69.1%
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.
CPE | Name | Operator | Version |
---|---|---|---|
debian_linux | eq | 8.0 | |
debian_linux | eq | 9.0 | |
kerberos | eq | < 5-1.17 |
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/[email protected]/message/2KNHELH4YHNT6H2ESJWX2UIDXLBNGB2O/
security.netapp.com/advisory/ntap-20190416-0006/
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
5.4 Medium
AI Score
Confidence
High
3.5 Low
CVSS2
Access Vector
NETWORK
Access 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
0.003 Low
EPSS
Percentile
69.1%