CVE-2016-7068: Input Validation
First published: Tue Sep 11 2018(Updated: )
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.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| PowerDNS Authoritative | <3.4.11 | |
| PowerDNS Authoritative | >=4.0.0<4.0.2 | |
| PowerDNS Recursor | <3.7.4 | |
| PowerDNS Recursor | >=4.0.0<4.0.4 | |
| Debian Debian Linux | =8.0 | |
| debian/pdns | 4.1.6-3+deb10u1 4.4.1-1 4.7.3-2 4.8.3-1 4.8.3-2 | |
| debian/pdns-recursor | 4.1.11-1+deb10u1 4.4.2-3 4.8.4-1 4.9.1-3 4.9.1-4 |
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Reference Links
Frequently Asked Questions
What is CVE-2016-7068?
CVE-2016-7068 is a vulnerability in PowerDNS before 3.4.11 and 4.0.2, and PowerDNS recursor before 3.7.4 and 4.0.4, that allows a remote, unauthenticated attacker to cause abnormal CPU usage load on the PowerDNS server.
What is the severity of CVE-2016-7068?
The severity of CVE-2016-7068 is high, with a severity value of 7.5.
How does CVE-2016-7068 affect PowerDNS?
CVE-2016-7068 affects PowerDNS versions before 3.4.11 and 4.0.2, and PowerDNS recursor versions before 3.7.4 and 4.0.4.
How can CVE-2016-7068 be exploited?
CVE-2016-7068 can be exploited by sending crafted DNS queries to the PowerDNS server, causing abnormal CPU usage.
Is there a fix for CVE-2016-7068?
Yes, updating to PowerDNS version 3.4.11 or 4.0.2 (for PowerDNS authoritative), and version 3.7.4 or 4.0.4 (for PowerDNS recursor) will fix the vulnerability.
- collector/nvd-index
- collector/security-tracker-debian
- agent/references
- agent/severity
- agent/author
- agent/tags
- agent/type
- agent/event
- agent/weakness
- agent/description
- agent/last-modified-date
- agent/softwarecombine
- agent/first-publish-date
- collector/mitre-cve
- source/MITRE
- vendor/powerdns
- canonical/powerdns authoritative
- version/powerdns authoritative/4.0.0
- canonical/powerdns recursor
- version/powerdns recursor/4.0.0
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/8.0
- package-manager/debian