CVE-2017-15093

Description

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.

CVSS Metrics

• v3.0•MEDIUM•Score: 5.3CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
• v2.0•LOW•Score: 3.5AV:N/AC:M/Au:S/C:N/I:P/A:N

EPSS Trends

Current EPSS score: 0.00%• Percentile: 0%

Techniques & Countermeasures

• CWE-20•Improper Input Validation

  The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Affected Systems

• powerdns•powerdns_recursor

  4.x up to and including 4.0.6 | 3.x up to and including 3.7.4

• powerdns•recursor

  ≥ 3.0, ≤ 3.7.4 | ≥ 4.0.0, ≤ 4.0.6

References (2)

• http://www.securityfocus.com/bid/101982
• https://doc.powerdns.com/recursor/security-advisories/powerdns-advisory-2017-06.html