- Vulnerabilities 86,891
PowerDNS Authoritative Server DoS Vulnerabilities
Published: 2016-09-12 03:44:19
CVE Author: NIST National Vulnerability Database
CVSS Base Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:P
Summary:
PowerDNS Authoritative Server is prone to two denial of service
vulnerabilities.
Detection Method:
Checks if a vulnerable version is present on the target host.
Technical Details:
Two issues have been found in PowerDNS Authoritative Server allowing a
remote, unauthenticated attacker to cause an abnormal load on the PowerDNS backend by sending crafted DNS
queries, which might result in a partial denial of service if the backend becomes overloaded. SQL backends for
example are particularly vulnerable to this kind of unexpected load if they have not been dimensioned for it.
The first issue is based on the fact that PowerDNS Authoritative Server accepts queries with a qname's length
larger than 255 bytes (CVE-2016-5426). The second issue is based on the fact that PowerDNS Authoritative Server
does not properly handle dot inside labels (CVE-2016-5427).
Impact:
A remote attacker may cause a parital DoS condition.
Affected Versions:
PowerDNS Authoritative Server 3.4.9 and prior.
Recommendations:
Upgrade to version 3.4.10 or later
Detection Type:
Remote Banner Unreliable
Solution Type:
Vendor Patch
https://nvd.nist.gov/vuln/detail/CVE-2016-5426
https://nvd.nist.gov/vuln/detail/CVE-2016-5427
https://doc.powerdns.com/md/security/powerdns-advisory-2016-01/
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