- Vulnerabilities 87,986
PowerDNS Security Advisory 2016-02: Crafted queries can cause abnormal CPU usage
Published: 2018-09-12 14:54:11
CVE Author: NIST National Vulnerability Database
CVSS Base Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:C
Detection Type:
Remote Banner Unreliable
Solution Type:
Vendor Patch
Summary:
An issue has been found in PowerDNS 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.
This issue has been assigned CVE-2016-7068.
Detection Method:
Checks if a vulnerable version is present on the target host.
Affected Versions:
PowerDNS Authoritative Server up to and including 3.4.10 and 4.0.1 are affected.
PowerDNS Recursor up to and including 3.7.3 and 4.0.3 are affected.
Recommendations:
Update PowerDNS Authoritative Server to version 3.4.11 or 4.0.2 respectively.
Update PowerDNS Recursor to 3.7.4 or 4.0.4 respectively.
https://nvd.nist.gov/vuln/detail/CVE-2016-7068
https://doc.powerdns.com/md/security/powerdns-advisory-2016-02/
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