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CVE-2018-20217
CVE information
Published
Last Modified
CVSSv2.0 Severity
CVSSv3.1 Severity
Impact Analysis
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..
CVSSv2.0 Score
- Severity
- Low
- Base Score
- 3.5/10
- Exploit Score
- 6.8/10
- Access Vector
- Network
- Access Complexity
- Medium
- Authentication Required
- Single
- Impact Score
- 2.9/10
- Confidentiality Impact
- None
- Availability Impact
- Partial
- Integrity Impact
- None
CVSSv3.1 Score
- Severity
- Medium
- Base Score
- 5.3/10
- Exploit Score
- 1.6/10
- Access Vector
- Network
- Access Complexity
- High
- Privileges Required
- Low
- Impact Score
- 3.6/10
- Confidentiality Impact
- None
- Availability Impact
- High
- Integrity Impact
- None
- Scope
- Unchanged
- User Interaction
- None
Products Affected
CPE | Affected | Vulnerable | Excluding | Edit |
---|---|---|---|---|
cpe:2.3:a:mit:kerberos:*:*:*:*:*:*:*:* |
Yes
|
- | 5-1.17 | |
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* |
Yes
|
- | - | |
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* |
Yes
|
- | - |
References
- https://github.com/krb5/krb5/commit/5e6d1796106df8ba6bc1973ee0917c170d929086
- http://krbdev.mit.edu/rt/Ticket/Display.html?id=8763
- https://lists.debian.org/debian-lts-announce/2019/01/msg00020.html
- https://security.netapp.com/advisory/ntap-20190416-0006/
- https://lists.debian.org/debian-lts-announce/2021/09/msg00019.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org