CVE-2018-16852 Null dereference in samba

What is CVE-2018-16852?

CVE-2018-16852 is a medium-severity vulnerability in Samba Samba, published on 28 Nov 2018. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Samba from version 4.9.0 and before version 4.9.3 is vulnerable to a NULL pointer de-reference. During the processing of an DNS zone in the DNS management DCE/RPC server, the internal DNS server or the Samba DLZ plugin for BIND9, if the DSPROPERTY_ZONE_MASTER_SERVERS property or DSPROPERTY_ZONE_SCAVENGING_SERVERS property is set, the server will follow a NULL pointer and terminate. There is no further vulnerability associated with this issue, merely a denial of service.

Weakness: CWE-476

Which versions are affected by CVE-2018-16852?

It affects 1 product.

Products include Samba Samba.

How do I fix CVE-2018-16852?

Upgrade to a fixed version.

Is CVE-2018-16852 being exploited?

There is no known exploitation of CVE-2018-16852 in the wild and no public exploit code.

Other vulnerabilities in Samba Samba

• CVE-2012-1182 Integer overflow in n/a Critical 10.0
• CVE-2007-2446 Memory corruption in n/a Critical 10.0
• CVE-2004-0600 Memory corruption in n/a Critical 10.0
• CVE-1999-0810 Denial of service in n/a Critical 10.0
• CVE-1999-0182 Memory corruption in n/a Critical 10.0

All Samba Samba vulnerabilities

Sources

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

Also known as DEBIAN-CVE-2018-16852, ECHO-1023-88ca-e2e1, GHSA-66rc-c89h-v5pc.