Resource exhaustion in Open-Xchange Pdns
CVE-2016-7068
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.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.073 (93.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Open-xchange Pdns — versions 4.0.2, 3.7.4, 3.4.11
- Powerdns Authoritative
- Powerdns Recursor
- Debian Debian_linux — versions 8.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (x_refsource_CONFIRM, Third Party Advisory, Issue Tracking)
- secalert@redhat.com (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
- secalert@redhat.com (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
- secalert@redhat.com (x_refsource_CONFIRM, Vendor Advisory)
Frequently asked questions
- What is CVE-2016-7068?
- CVE-2016-7068 is a medium-severity vulnerability in Open-Xchange Pdns, classified under Improper Input Validation. CVSS score: 5.3/10. Published 2018-09-11.
- How severe is CVE-2016-7068?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2016-7068 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.