Vulnerability identifier: #VU33440

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-10162

CWE-ID: CWE-285

Exploitation vector: Network

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

A vulnerability has been found in PowerDNS Authoritative Server before versions 4.1.10, 4.0.8 allowing an authorized user to cause the server to exit by inserting a crafted record in a MASTER type zone under their control. The issue is due to the fact that the Authoritative Server will exit when it runs into a parsing error while looking up the NS/A/AAAA records it is about to use for an outgoing notify.

Mitigation
Install update from vendor's website.

External links
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00036.html
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00054.html
http://blog.powerdns.com/2019/06/21/powerdns-authoritative-server-4-0-8-and-4-1-10-released/
http://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10162
http://doc.powerdns.com/authoritative/security-advisories/powerdns-advisory-2019-04.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.