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Vulnerability Details : CVE-2018-20217

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.
Publish Date : 2018-12-26 Last Update Date : 2019-10-02
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- CVSS Scores & Vulnerability Types

CVSS Score
3.5
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Single system (The vulnerability requires an attacker to be logged into the system (such as at a command line or via a desktop session or web interface).)
Gained Access None
Vulnerability Type(s)
CWE ID 617

- Related OVAL Definitions

Title Definition Id Class Family
RHBA-2019:2599: krb5 bug fix update (Moderate) oval:com.redhat.rhba:def:20192599 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2018-20217

# Product Type Vendor Product Version Update Edition Language
1 OS Debian Debian Linux 8.0 Version Details Vulnerabilities
2 Application MIT Kerberos - Version Details Vulnerabilities
3 Application MIT Kerberos 4 Version Details Vulnerabilities
4 Application MIT Kerberos 4.0 Version Details Vulnerabilities
5 Application MIT Kerberos 5 Version Details Vulnerabilities
6 Application MIT Kerberos 5-1.1 Version Details Vulnerabilities
7 Application MIT Kerberos 5-1.2 Version Details Vulnerabilities
8 Application MIT Kerberos 5-1.2.1 Version Details Vulnerabilities
9 Application MIT Kerberos 5-1.2.2 Version Details Vulnerabilities
10 Application MIT Kerberos 5-1.2.3 Version Details Vulnerabilities
11 Application MIT Kerberos 5-1.2.4 Version Details Vulnerabilities
12 Application MIT Kerberos 5-1.2.5 Version Details Vulnerabilities
13 Application MIT Kerberos 5-1.2.6 Version Details Vulnerabilities
14 Application MIT Kerberos 5-1.2.7 Version Details Vulnerabilities
15 Application MIT Kerberos 5-1.2.8 Version Details Vulnerabilities
16 Application MIT Kerberos 5-1.3 Alpha1 Version Details Vulnerabilities
17 Application MIT Kerberos 5-1.3 Version Details Vulnerabilities
18 Application MIT Kerberos 5-1.3.1 Version Details Vulnerabilities
19 Application MIT Kerberos 5-1.3.2 Version Details Vulnerabilities
20 Application MIT Kerberos 5-1.3.3 Version Details Vulnerabilities
21 Application MIT Kerberos 5-1.3.4 Version Details Vulnerabilities
22 Application MIT Kerberos 5-1.3.5 Version Details Vulnerabilities
23 Application MIT Kerberos 5-1.3.6 Version Details Vulnerabilities
24 Application MIT Kerberos 5-1.4 Version Details Vulnerabilities
25 Application MIT Kerberos 5-1.4.1 Version Details Vulnerabilities
26 Application MIT Kerberos 5-1.4.2 Version Details Vulnerabilities
27 Application MIT Kerberos 5-1.4.3 Version Details Vulnerabilities
28 Application MIT Kerberos 5-1.4.4 Version Details Vulnerabilities
29 Application MIT Kerberos 5-1.5 Version Details Vulnerabilities
30 Application MIT Kerberos 5-1.5.1 Version Details Vulnerabilities
31 Application MIT Kerberos 5-1.5.2 Version Details Vulnerabilities
32 Application MIT Kerberos 5-1.5.3 Version Details Vulnerabilities
33 Application MIT Kerberos 5-1.6 Version Details Vulnerabilities
34 Application MIT Kerberos 5-1.6.1 Version Details Vulnerabilities
35 Application MIT Kerberos 5-1.6.2 Version Details Vulnerabilities
36 Application MIT Kerberos 5-1.7 Version Details Vulnerabilities
37 Application MIT Kerberos 5-1.7.1 Version Details Vulnerabilities
38 Application MIT Kerberos 5-1.8 Version Details Vulnerabilities
39 Application MIT Kerberos 5-1.8.1 Version Details Vulnerabilities
40 Application MIT Kerberos 5-1.8.2 Version Details Vulnerabilities
41 Application MIT Kerberos 5-1.8.3 Version Details Vulnerabilities
42 Application MIT Kerberos 5-1.8.4 Version Details Vulnerabilities
43 Application MIT Kerberos 5-1.8.5 Version Details Vulnerabilities
44 Application MIT Kerberos 5-1.8.6 Version Details Vulnerabilities
45 Application MIT Kerberos 5-1.9 Version Details Vulnerabilities
46 Application MIT Kerberos 5-1.9.1 Version Details Vulnerabilities
47 Application MIT Kerberos 5-1.9.2 Version Details Vulnerabilities
48 Application MIT Kerberos 5-1.9.3 Version Details Vulnerabilities
49 Application MIT Kerberos 5-1.9.4 Version Details Vulnerabilities
50 Application MIT Kerberos 5-1.10 Version Details Vulnerabilities
51 Application MIT Kerberos 5-1.10.1 Version Details Vulnerabilities
52 Application MIT Kerberos 5-1.10.2 Version Details Vulnerabilities
53 Application MIT Kerberos 5-1.10.3 Version Details Vulnerabilities
54 Application MIT Kerberos 5-1.10.4 Version Details Vulnerabilities
55 Application MIT Kerberos 5-1.11 Version Details Vulnerabilities
56 Application MIT Kerberos 5-1.11.1 Version Details Vulnerabilities
57 Application MIT Kerberos 5-1.11.2 Version Details Vulnerabilities
58 Application MIT Kerberos 5-1.11.3 Version Details Vulnerabilities
59 Application MIT Kerberos 5-1.11.4 Version Details Vulnerabilities
60 Application MIT Kerberos 5-1.11.5 Version Details Vulnerabilities
61 Application MIT Kerberos 5-1.12 Version Details Vulnerabilities
62 Application MIT Kerberos 5-1.12.1 Version Details Vulnerabilities
63 Application MIT Kerberos 5-1.12.2 Version Details Vulnerabilities
64 Application MIT Kerberos 5-1.12.3 Version Details Vulnerabilities
65 Application MIT Kerberos 5-1.12.4 Version Details Vulnerabilities
66 Application MIT Kerberos 5-1.12.5 Version Details Vulnerabilities
67 Application MIT Kerberos 5-1.13 Version Details Vulnerabilities
68 Application MIT Kerberos 5-1.13.1 Version Details Vulnerabilities
69 Application MIT Kerberos 5-1.13.2 Version Details Vulnerabilities
70 Application MIT Kerberos 5-1.13.3 Version Details Vulnerabilities
71 Application MIT Kerberos 5-1.13.4 Version Details Vulnerabilities
72 Application MIT Kerberos 5-1.13.5 Version Details Vulnerabilities
73 Application MIT Kerberos 5-1.13.6 Version Details Vulnerabilities
74 Application MIT Kerberos 5-1.14 Alpha1 Version Details Vulnerabilities
75 Application MIT Kerberos 5-1.14 Beta1 Version Details Vulnerabilities
76 Application MIT Kerberos 5-1.14 Beta2 Version Details Vulnerabilities
77 Application MIT Kerberos 5-1.14.0 Version Details Vulnerabilities
78 Application MIT Kerberos 5-1.14.1 Version Details Vulnerabilities
79 Application MIT Kerberos 5-1.14.2 Version Details Vulnerabilities
80 Application MIT Kerberos 5-1.14.3 Version Details Vulnerabilities
81 Application MIT Kerberos 5-1.14.4 Version Details Vulnerabilities
82 Application MIT Kerberos 5-1.14.5 Version Details Vulnerabilities
83 Application MIT Kerberos 5-1.15 Version Details Vulnerabilities
84 Application MIT Kerberos 5-1.15.1 Beta1 Version Details Vulnerabilities
85 Application MIT Kerberos 5-1.15.1 Beta2 Version Details Vulnerabilities
86 Application MIT Kerberos 5-1.15.1 Version Details Vulnerabilities
87 Application MIT Kerberos 5-1.16.1 Version Details Vulnerabilities
88 Application MIT Kerberos 5-1.16.2 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Debian Debian Linux 1
MIT Kerberos 87

- References For CVE-2018-20217

https://lists.fedoraproject.org/archives/list/[email protected]/message/2KNHELH4YHNT6H2ESJWX2UIDXLBNGB2O/
FEDORA FEDORA-2018-7db7ccda4d
https://security.netapp.com/advisory/ntap-20190416-0006/ CONFIRM
https://github.com/krb5/krb5/commit/5e6d1796106df8ba6bc1973ee0917c170d929086 CONFIRM
https://lists.debian.org/debian-lts-announce/2019/01/msg00020.html
MLIST [debian-lts-announce] 20190125 [SECURITY] [DLA 1643-1] krb5 security update
http://krbdev.mit.edu/rt/Ticket/Display.html?id=8763 CONFIRM

- Metasploit Modules Related To CVE-2018-20217

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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