CVE-2017-12150 Security feature bypass in samba

What is CVE-2017-12150?

CVE-2017-12150 is a high-severity vulnerability in Debian Debian Linux, published on 26 Jul 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

It was found that samba before 4.4.16, 4.5.x before 4.5.14, and 4.6.x before 4.6.8 did not enforce "SMB signing" when certain configuration options were enabled. A remote attacker could launch a man-in-the-middle attack and retrieve information in plain-text.

Weakness: CWE-300

Which versions are affected by CVE-2017-12150?

It affects 6 products.

Products include Debian Debian Linux, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Workstation, Redhat Gluster Storage, Samba Samba.

How do I fix CVE-2017-12150?

Upgrade to a fixed version.

Is CVE-2017-12150 being exploited?

There is no known exploitation of CVE-2017-12150 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2017-12150, AZL-45336, DEBIAN-CVE-2017-12150, ECHO-fa4e-222f-e146, GHSA-3747-3v6r-p947, UBUNTU-CVE-2017-12150.