#VU16157 Denial of service in Samba - CVE-2018-16853

Vulnerability identifier: #VU16157

Vulnerability risk: Low

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-16853

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Samba
Server applications / Directory software, identity management

Vendor: Samba

Description

The vulnerability allows a remote authenticated attacker to cause DoS condition.

The vulnerability exists due to use of experimental MIT Kerberos build of the Samba AD DC. A remote attacker can crash the KDC when Samba is built in the non-default MIT Kerberos configuration.

Mitigation
The vulnerability has been fixed in the version 4.7.12, 4.8.7, and 4.9.3.

Vulnerable software versions

Samba: 4.7.0 - 4.7.11, 4.8.0 - 4.8.6, 4.9.0 - 4.9.2

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External links
https://www.samba.org/samba/security/CVE-2018-16853.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.