CVE-2019-12436 Null dereference in n/a

What is CVE-2019-12436?

CVE-2019-12436 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 19 Jun 2019. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Samba 4.10.x before 4.10.5 has a NULL pointer dereference, leading to an AD DC LDAP server Denial of Service. This is related to an attacker using the paged search control. The attacker must have directory read access in order to attempt an exploit.

Weakness: CWE-476

Which versions are affected by CVE-2019-12436?

It affects 2 products.

Products include Canonical Ubuntu Linux, Samba Samba.

How do I fix CVE-2019-12436?

Upgrade to a fixed version.

Is CVE-2019-12436 being exploited?

There is no known exploitation of CVE-2019-12436 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 ALPINE-CVE-2019-12436, GHSA-8c68-g8rx-85g8.