CVE-2016-7068

moderate-risk
Published 2018-09-11

An issue has been found in PowerDNS before 3.4.11 and 4.0.2, and PowerDNS recursor before 3.7.4 and 4.0.4, allowing a remote, unauthenticated attacker to cause an abnormal CPU usage load on the PowerDNS server by sending crafted DNS queries, which might result in a partial denial of service if the system becomes overloaded. This issue is based on the fact that the PowerDNS server parses all records present in a query regardless of whether they are needed or even legitimate. A specially crafted query containing a large number of records can be used to take advantage of that behaviour.

Do I need to act?

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0.08% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.3/10 Medium
NETWORK / LOW complexity

Affected Products (3)

Authoritative

Affected Vendors

Debian Powerdns

References (8)

Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7068
Vendor Advisory https://doc.powerdns.com/md/security/powerdns-advisory-2016-02/
Third Party Advisory https://www.debian.org/security/2017/dsa-3763
Third Party Advisory https://www.debian.org/security/2017/dsa-3764
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7068
Vendor Advisory https://doc.powerdns.com/md/security/powerdns-advisory-2016-02/
Third Party Advisory https://www.debian.org/security/2017/dsa-3763
Third Party Advisory https://www.debian.org/security/2017/dsa-3764
30
/ 100
moderate-risk
Severity 21/34 · High
Exploitability 0/34 · Minimal
Exposure 9/34 · Low