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Vulnerability Details : CVE-2018-16841

Samba from version 4.3.0 and before versions 4.7.12, 4.8.7 and 4.9.3 are vulnerable to a denial of service. When configured to accept smart-card authentication, Samba's KDC will call talloc_free() twice on the same memory if the principal in a validly signed certificate does not match the principal in the AS-REQ. This is only possible after authentication with a trusted certificate. talloc is robust against further corruption from a double-free with talloc_free() and directly calls abort(), terminating the KDC process.
Publish Date : 2018-11-28 Last Update Date : 2019-10-09
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- CVSS Scores & Vulnerability Types

CVSS Score
4.0
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 Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required 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) Denial Of ServiceMemory corruption
CWE ID 415

- Products Affected By CVE-2018-16841

# Product Type Vendor Product Version Update Edition Language
1 OS Canonical Ubuntu Linux 12.04 ~~esm~~~ Version Details Vulnerabilities
2 OS Canonical Ubuntu Linux 14.04 ~~lts~~~ Version Details Vulnerabilities
3 OS Canonical Ubuntu Linux 16.04 ~~lts~~~ Version Details Vulnerabilities
4 OS Canonical Ubuntu Linux 18.04 ~~lts~~~ Version Details Vulnerabilities
5 OS Canonical Ubuntu Linux 18.10 Version Details Vulnerabilities
6 OS Debian Debian Linux 9.0 Version Details Vulnerabilities
7 Application Samba Samba 4.3.0 Version Details Vulnerabilities
8 Application Samba Samba 4.3.1 Version Details Vulnerabilities
9 Application Samba Samba 4.3.2 Version Details Vulnerabilities
10 Application Samba Samba 4.3.3 Version Details Vulnerabilities
11 Application Samba Samba 4.3.4 Version Details Vulnerabilities
12 Application Samba Samba 4.3.5 Version Details Vulnerabilities
13 Application Samba Samba 4.3.6 Version Details Vulnerabilities
14 Application Samba Samba 4.3.7 Version Details Vulnerabilities
15 Application Samba Samba 4.3.8 Version Details Vulnerabilities
16 Application Samba Samba 4.3.9 Version Details Vulnerabilities
17 Application Samba Samba 4.3.10 Version Details Vulnerabilities
18 Application Samba Samba 4.3.11 Version Details Vulnerabilities
19 Application Samba Samba 4.3.12 Version Details Vulnerabilities
20 Application Samba Samba 4.3.13 Version Details Vulnerabilities
21 Application Samba Samba 4.4.0 Version Details Vulnerabilities
22 Application Samba Samba 4.4.0 RC1 Version Details Vulnerabilities
23 Application Samba Samba 4.4.0 RC2 Version Details Vulnerabilities
24 Application Samba Samba 4.4.0 RC3 Version Details Vulnerabilities
25 Application Samba Samba 4.4.1 Version Details Vulnerabilities
26 Application Samba Samba 4.4.2 Version Details Vulnerabilities
27 Application Samba Samba 4.4.3 Version Details Vulnerabilities
28 Application Samba Samba 4.4.4 Version Details Vulnerabilities
29 Application Samba Samba 4.4.5 Version Details Vulnerabilities
30 Application Samba Samba 4.4.6 Version Details Vulnerabilities
31 Application Samba Samba 4.4.7 Version Details Vulnerabilities
32 Application Samba Samba 4.4.8 Version Details Vulnerabilities
33 Application Samba Samba 4.4.9 Version Details Vulnerabilities
34 Application Samba Samba 4.4.10 Version Details Vulnerabilities
35 Application Samba Samba 4.4.11 Version Details Vulnerabilities
36 Application Samba Samba 4.4.12 Version Details Vulnerabilities
37 Application Samba Samba 4.4.13 Version Details Vulnerabilities
38 Application Samba Samba 4.4.14 Version Details Vulnerabilities
39 Application Samba Samba 4.4.15 Version Details Vulnerabilities
40 Application Samba Samba 4.4.16 Version Details Vulnerabilities
41 Application Samba Samba 4.5.0 - Version Details Vulnerabilities
42 Application Samba Samba 4.5.0 RC1 Version Details Vulnerabilities
43 Application Samba Samba 4.5.0 RC2 Version Details Vulnerabilities
44 Application Samba Samba 4.5.0 RC3 Version Details Vulnerabilities
45 Application Samba Samba 4.5.0 Version Details Vulnerabilities
46 Application Samba Samba 4.5.1 Version Details Vulnerabilities
47 Application Samba Samba 4.5.2 Version Details Vulnerabilities
48 Application Samba Samba 4.5.3 Version Details Vulnerabilities
49 Application Samba Samba 4.5.4 Version Details Vulnerabilities
50 Application Samba Samba 4.5.5 Version Details Vulnerabilities
51 Application Samba Samba 4.5.6 Version Details Vulnerabilities
52 Application Samba Samba 4.5.7 Version Details Vulnerabilities
53 Application Samba Samba 4.5.8 Version Details Vulnerabilities
54 Application Samba Samba 4.5.9 Version Details Vulnerabilities
55 Application Samba Samba 4.5.10 Version Details Vulnerabilities
56 Application Samba Samba 4.5.11 Version Details Vulnerabilities
57 Application Samba Samba 4.5.12 Version Details Vulnerabilities
58 Application Samba Samba 4.5.13 Version Details Vulnerabilities
59 Application Samba Samba 4.5.14 Version Details Vulnerabilities
60 Application Samba Samba 4.5.15 Version Details Vulnerabilities
61 Application Samba Samba 4.5.16 Version Details Vulnerabilities
62 Application Samba Samba 4.6.0 RC1 Version Details Vulnerabilities
63 Application Samba Samba 4.6.0 RC2 Version Details Vulnerabilities
64 Application Samba Samba 4.6.0 RC3 Version Details Vulnerabilities
65 Application Samba Samba 4.6.0 RC4 Version Details Vulnerabilities
66 Application Samba Samba 4.6.0 Version Details Vulnerabilities
67 Application Samba Samba 4.6.0 - Version Details Vulnerabilities
68 Application Samba Samba 4.6.1 Version Details Vulnerabilities
69 Application Samba Samba 4.6.2 Version Details Vulnerabilities
70 Application Samba Samba 4.6.3 Version Details Vulnerabilities
71 Application Samba Samba 4.6.4 Version Details Vulnerabilities
72 Application Samba Samba 4.6.5 Version Details Vulnerabilities
73 Application Samba Samba 4.6.6 Version Details Vulnerabilities
74 Application Samba Samba 4.6.7 Version Details Vulnerabilities
75 Application Samba Samba 4.6.8 Version Details Vulnerabilities
76 Application Samba Samba 4.6.9 Version Details Vulnerabilities
77 Application Samba Samba 4.6.10 Version Details Vulnerabilities
78 Application Samba Samba 4.6.11 Version Details Vulnerabilities
79 Application Samba Samba 4.6.12 Version Details Vulnerabilities
80 Application Samba Samba 4.6.13 Version Details Vulnerabilities
81 Application Samba Samba 4.6.14 Version Details Vulnerabilities
82 Application Samba Samba 4.6.15 Version Details Vulnerabilities
83 Application Samba Samba 4.6.16 Version Details Vulnerabilities
84 Application Samba Samba 4.7.0 RC2 Version Details Vulnerabilities
85 Application Samba Samba 4.7.0 RC3 Version Details Vulnerabilities
86 Application Samba Samba 4.7.0 RC4 Version Details Vulnerabilities
87 Application Samba Samba 4.7.0 RC5 Version Details Vulnerabilities
88 Application Samba Samba 4.7.0 Version Details Vulnerabilities
89 Application Samba Samba 4.7.0 RC6 Version Details Vulnerabilities
90 Application Samba Samba 4.7.0 RC1 Version Details Vulnerabilities
91 Application Samba Samba 4.7.1 Version Details Vulnerabilities
92 Application Samba Samba 4.7.2 Version Details Vulnerabilities
93 Application Samba Samba 4.7.3 Version Details Vulnerabilities
94 Application Samba Samba 4.7.4 Version Details Vulnerabilities
95 Application Samba Samba 4.7.5 Version Details Vulnerabilities
96 Application Samba Samba 4.7.6 Version Details Vulnerabilities
97 Application Samba Samba 4.7.7 Version Details Vulnerabilities
98 Application Samba Samba 4.7.8 Version Details Vulnerabilities
99 Application Samba Samba 4.7.9 Version Details Vulnerabilities
100 Application Samba Samba 4.7.10 Version Details Vulnerabilities
101 Application Samba Samba 4.7.11 Version Details Vulnerabilities
102 Application Samba Samba 4.8.0 Version Details Vulnerabilities
103 Application Samba Samba 4.8.0 RC1 Version Details Vulnerabilities
104 Application Samba Samba 4.8.0 RC2 Version Details Vulnerabilities
105 Application Samba Samba 4.8.0 RC3 Version Details Vulnerabilities
106 Application Samba Samba 4.8.0 RC4 Version Details Vulnerabilities
107 Application Samba Samba 4.8.1 Version Details Vulnerabilities
108 Application Samba Samba 4.8.2 Version Details Vulnerabilities
109 Application Samba Samba 4.8.3 Version Details Vulnerabilities
110 Application Samba Samba 4.8.4 Version Details Vulnerabilities
111 Application Samba Samba 4.8.5 Version Details Vulnerabilities
112 Application Samba Samba 4.8.6 Version Details Vulnerabilities
113 Application Samba Samba 4.8.8 Version Details Vulnerabilities
114 Application Samba Samba 4.8.9 Version Details Vulnerabilities
115 Application Samba Samba 4.8.10 Version Details Vulnerabilities
116 Application Samba Samba 4.8.11 Version Details Vulnerabilities
117 Application Samba Samba 4.8.12 Version Details Vulnerabilities
118 Application Samba Samba 4.9.0 RC4 Version Details Vulnerabilities
119 Application Samba Samba 4.9.0 Version Details Vulnerabilities
120 Application Samba Samba 4.9.0 RC5 Version Details Vulnerabilities
121 Application Samba Samba 4.9.0 - Version Details Vulnerabilities
122 Application Samba Samba 4.9.0 RC1 Version Details Vulnerabilities
123 Application Samba Samba 4.9.0 RC2 Version Details Vulnerabilities
124 Application Samba Samba 4.9.0 RC3 Version Details Vulnerabilities
125 Application Samba Samba 4.9.1 Version Details Vulnerabilities
126 Application Samba Samba 4.9.2 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Canonical Ubuntu Linux 5
Debian Debian Linux 1
Samba Samba 120

- References For CVE-2018-16841

https://www.samba.org/samba/security/CVE-2018-16841.html CONFIRM
http://www.securityfocus.com/bid/106023
BID 106023 Samba CVE-2018-16841 Remote Denial of Service Vulnerability Release Date:2018-11-27
https://usn.ubuntu.com/3827-2/
UBUNTU USN-3827-2
https://www.debian.org/security/2018/dsa-4345
DEBIAN DSA-4345
https://usn.ubuntu.com/3827-1/
UBUNTU USN-3827-1
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16841 CONFIRM
https://security.netapp.com/advisory/ntap-20181127-0001/ CONFIRM

- Metasploit Modules Related To CVE-2018-16841

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


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