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CVE-2018-16857

7.4 · HIGH

Samba from version 4.9.0 and before version 4.9.3 that have AD DC configurations watching for bad passwords (to restrict brute forcing of passwords) in a window of more than 3 minutes may not watch…

Published Nov 28, 2018CWE-358EPSS 2.27%

Overview

CVE-2018-16857 is a high-severity vulnerability. It was published on November 28, 2018 and has a CVSS 3.0 base score of 7.4 (HIGH).

This vulnerability has a CVSS 3.0 base score of 7.4, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Samba from version 4.9.0 and before version 4.9.3 that have AD DC configurations watching for bad passwords (to restrict brute forcing of passwords) in a window of more than 3 minutes may not watch for bad passwords at all. The primary risk from this issue is with regards to domains that have been upgraded from Samba 4.8 and earlier. In these cases the manual testing done to confirm an organisation's password policies apply as expected may not have been re-done after the upgrade.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.securityfocus.com/bid/106024Refbugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16857Refsecurity.gentoo.org/glsa/202003-52Refsecurity.netapp.com/advisory/ntap-20181127-0001/Refwww.samba.org/samba/security/CVE-2018-16857.htmlRefwww.securityfocus.com/bid/106024Refbugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16857Refsecurity.gentoo.org/glsa/202003-52Refsecurity.netapp.com/advisory/ntap-20181127-0001/Refwww.samba.org/samba/security/CVE-2018-16857.html

How CyberStrike helps

Frequently asked questions

What is CVE-2018-16857?

CVE-2018-16857 is a high-severity vulnerability. It was published on November 28, 2018 and has a CVSS 3.0 base score of 7.4 (HIGH).

How severe is CVE-2018-16857?

This vulnerability has a CVSS 3.0 base score of 7.4, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2018-16857?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2018-16857?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-16857 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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