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CVE-2018-1066

6.5 · MEDIUM

The Linux kernel before version 4.11 is vulnerable to a NULL pointer dereference in fs/cifs/cifsencrypt.c:setup_ntlmv2_rsp() that allows an attacker controlling a CIFS server to kernel panic a clie…

Published Mar 2, 2018CWE-476EPSS 3.44%

Overview

CVE-2018-1066 is a medium-severity vulnerability. It was published on March 2, 2018 and has a CVSS 3.0 base score of 6.5 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The Linux kernel before version 4.11 is vulnerable to a NULL pointer dereference in fs/cifs/cifsencrypt.c:setup_ntlmv2_rsp() that allows an attacker controlling a CIFS server to kernel panic a client that has this server mounted, because an empty TargetInfo field in an NTLMSSP setup negotiation response is mishandled during session recovery.

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

Refgit.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cabfb3680f78981d26c078a26e5c748531257ebbRefwww.securityfocus.com/bid/103378Refbugzilla.redhat.com/show_bug.cgi?id=1539599GitHubgithub.com/torvalds/linux/commit/cabfb3680f78981d26c078a26e5c748531257ebbReflists.debian.org/debian-lts-announce/2018/07/msg00015.htmlReflists.debian.org/debian-lts-announce/2018/07/msg00016.htmlRefpatchwork.kernel.org/patch/10187633/Refusn.ubuntu.com/3880-1/Refusn.ubuntu.com/3880-2/Refwww.debian.org/security/2018/dsa-4187

How CyberStrike helps

Frequently asked questions

What is CVE-2018-1066?

CVE-2018-1066 is a medium-severity vulnerability. It was published on March 2, 2018 and has a CVSS 3.0 base score of 6.5 (MEDIUM).

How severe is CVE-2018-1066?

This vulnerability has a CVSS 3.0 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2018-1066?

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-2018-1066?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-1066 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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