CVE-2018-14644: Input Validation
First published: Fri Nov 09 2018(Updated: )
An issue has been found in PowerDNS Recursor from 4.0.0 up to and including 4.1.4. A remote attacker sending a DNS query for a meta-type like OPT can lead to a zone being wrongly cached as failing DNSSEC validation. It only arises if the parent zone is signed, and all the authoritative servers for that parent zone answer with FORMERR to a query for at least one of the meta-types. As a result, subsequent queries from clients requesting DNSSEC validation will be answered with a ServFail.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/pdns-recursor | 4.4.2-3 4.8.8-1 5.1.3-1 | |
| PowerDNS | >=4.0.0<=4.1.4 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14644
- https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2018-07.html
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-14644
- https://nvd.nist.gov/vuln/detail/CVE-2018-14644
- https://launchpad.net/bugs/cve/CVE-2018-14644
- https://security-tracker.debian.org/tracker/CVE-2018-14644
- https://ubuntu.com/security/CVE-2018-14644
- https://doc.powerdns.com/recursor/security-advisories/powerdns-advisory-2018-07.html
- https://downloads.powerdns.com/patches/2018-07/
- https://git.fosscommunity.in/bhe/patches/raw/master/CVE-2018-14644.patch
Frequently Asked Questions
What is CVE-2018-14644?
CVE-2018-14644 is a vulnerability found in PowerDNS Recursor from version 4.0.0 up to and including 4.1.4.
What is the severity of CVE-2018-14644?
CVE-2018-14644 has a severity rating of 5.9, which is considered medium.
How does CVE-2018-14644 affect PowerDNS Recursor?
CVE-2018-14644 allows a remote attacker to send a DNS query for a specific meta-type, leading to a zone being incorrectly cached as failing DNSSEC validation if the parent zone is signed.
Which versions of PowerDNS Recursor are affected by CVE-2018-14644?
CVE-2018-14644 affects PowerDNS Recursor versions 4.0.0 up to and including 4.1.4.
How can I fix CVE-2018-14644?
To fix CVE-2018-14644, upgrade PowerDNS Recursor to version 4.1.5 or later.
- agent/type
- collector/mitre-cve
- source/MITRE
- agent/weakness
- agent/severity
- agent/first-publish-date
- collector/security-tracker-debian
- source/Debian
- agent/software-canonical-lookup
- agent/references
- collector/launchpad-cve
- source/Launchpad
- agent/last-modified-date
- agent/softwarecombine
- agent/author
- collector/usn-cve
- source/Ubuntu
- agent/description
- agent/event
- agent/source
- agent/tags
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup-request
- collector/nvd-index
- package-manager/debian
- vendor/powerdns
- canonical/powerdns
- version/powerdns/4.0.0
- version/powerdns/4.1.4