Improper input validation in Powerdns Dnsdist
CVE-2018-14663
An issue has been found in PowerDNS DNSDist before 1.3.3 allowing a remote attacker to craft a DNS query with trailing data such that the addition of a record by dnsdist, for example an OPT record when adding EDNS Client Subnet, might result in the trailing data being smuggled to the backend as a valid record while not seen by dnsdist. This is an issue when dnsdist is deployed as a DNS Firewall and used to filter some records that should not be received by the backend. This issue occurs only when either the 'useClientSubnet' or the experimental 'addXPF' parameters are used when declaring a new backend.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.026 (84.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 84.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.026 · newest: 0.026 · change: 0.000
Affected products
- Powerdns Dnsdist
- [Unknown] Dnsdist — versions 1.3.3
Weakness classification (CWE)
References
- dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2018-08.html (Vendor Advisory)
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2018-14663?
- CVE-2018-14663 is a medium-severity vulnerability in Powerdns Dnsdist, classified under Improper Input Validation. CVSS score: 5.9/10. Published 2018-11-26.
- How severe is CVE-2018-14663?
- Medium severity. CVSS v3 base score is 5.9 out of 10.