CVE-2019-9213 Null dereference in n/a

What is CVE-2019-9213?

CVE-2019-9213 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 5 Mar 2019. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In the Linux kernel before 4.20.14, expand_downwards in mm/mmap.c lacks a check for the mmap minimum address, which makes it easier for attackers to exploit kernel NULL pointer dereferences on non-SMAP platforms. This is related to a capability check for the wrong task.

Weakness: CWE-476

Which versions are affected by CVE-2019-9213?

It affects 5 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Linux kernel, Opensuse Leap, Redhat Enterprise Linux.

How do I fix CVE-2019-9213?

Apply the vendor's patch.

Is CVE-2019-9213 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-9213 exists.

Public exploit code: 1 Metasploit module and 3 Exploit-DB entries.

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-2019-9213, GHSA-4r7r-87cf-rc4r, MGASA-2019-0120, SUSE-SU-2019:0761-1, UBUNTU-CVE-2019-9213.