CVE-2018-1066 Null dereference in Linux kernel 4.11

What is CVE-2018-1066?

CVE-2018-1066 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 2 Mar 2018. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official 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.

Weakness: CWE-476

Which versions are affected by CVE-2018-1066?

It affects 3 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Linux kernel.

How do I fix CVE-2018-1066?

Upgrade to a fixed version.

Is CVE-2018-1066 being exploited?

There is no known exploitation of CVE-2018-1066 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

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

Also known as DEBIAN-CVE-2018-1066, GHSA-32qx-3229-j5m2, UBUNTU-CVE-2018-1066.