#VU15960 Memory leak in PowerDNS Recursor and PowerDNS Authoritative - CVE-2018-10851

Vulnerability identifier: #VU15960

Vulnerability risk: Low

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-10851

CWE-ID: CWE-401

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
PowerDNS Recursor
Server applications / DNS servers
PowerDNS Authoritative
Server applications / DNS servers

Vendor: PowerDNS.COM B.V.

Description

The vulnerability allows a remote authenticated attacker to cause DoS condition on the target system.

The vulnerability exists due to memory leak when handling malicious input. A remote attacker can insert a specially crafted record in a zone under his control, send a DNS query for that record, trigger memory leak and cause the service to crash.

Mitigation
The vulnerability has been fixed in the versions 4.1.5.

Vulnerable software versions

PowerDNS Recursor: 4.0.0 - 4.0.9, 4.1.0 - 4.1.4

PowerDNS Authoritative: 4.0.0 - 4.0.9, 4.1.0 - 4.1.4

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External links
https://bugzilla.redhat.com/show_bug.cgi?id=1649032

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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