Improper Input Validation Affecting pdns-recursor package, versions <4.0.7-r0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-ALPINE310-PDNSRECURSOR-454767
- published23 Jan 2018
- disclosed23 Jan 2018
Introduced: 23 Jan 2018
CVE-2017-15093 (opens in a new tab)How to fix?
Upgrade Alpine:3.10 pdns-recursor to version 4.0.7-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream pdns-recursor package and not the pdns-recursor package as distributed by Alpine.
See How to fix? for Alpine:3.10 relevant fixed versions and status.
When api-config-dir is set to a non-empty value, which is not the case by default, the API in PowerDNS Recursor 4.x up to and including 4.0.6 and 3.x up to and including 3.7.4 allows an authorized user to update the Recursor's ACL by adding and removing netmasks, and to configure forward zones. It was discovered that the new netmask and IP addresses of forwarded zones were not sufficiently validated, allowing an authenticated user to inject new configuration directives into the Recursor's configuration.
References
- https://doc.powerdns.com/recursor/security-advisories/powerdns-advisory-2017-06.html
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-15093
- https://security-tracker.debian.org/tracker/CVE-2017-15093
- http://www.securityfocus.com/bid/101982
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2017-15093