Integer overflow in PowerDNS

1) Integer overflow

EUVDB-ID: #VU32138

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-2120

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

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

An issue has been found in PowerDNS Authoritative Server versions up to and including 3.4.10, 4.0.1 allowing an authorized user to crash the server by inserting a specially crafted record in a zone under their control then sending a DNS query for that record. The issue is due to an integer overflow when checking if the content of the record matches the expected size, allowing an attacker to cause a read past the buffer boundary.

Mitigation

Install update from vendor's website.

Vulnerable software versions

PowerDNS: 3.4.0 - 3.4.10

CPE2.3

• cpe:2.3:a:powerdns_com_b_v:powerdns:3.4.0:*:*:*:*:*:*:*
• cpe:2.3:a:powerdns_com_b_v:powerdns:3.4.1:*:*:*:*:*:*:*
• cpe:2.3:a:powerdns_com_b_v:powerdns:3.4.2:*:*:*:*:*:*:*

External links

http://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-2120
http://www.debian.org/security/2017/dsa-3764

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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