CVE-2017-15094

Description

An issue has been found in the DNSSEC parsing code of PowerDNS Recursor from 4.0.0 up to and including 4.0.6 leading to a memory leak when parsing specially crafted DNSSEC ECDSA keys. These keys are only parsed when validation is enabled by setting dnssec to a value other than off or process-no-validate (default).

CVSS Metrics

• v3.0•MEDIUM•Score: 5.9CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
• v2.0•MEDIUM•Score: 4.3AV:N/AC:M/Au:N/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 3.30%• Percentile: 88%

Techniques & Countermeasures

• CWE-401•Missing Release of Memory after Effective Lifetime

  The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

• CWE-772•Missing Release of Resource after Effective Lifetime

  The product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed.

Affected Systems

• debian•pdns-recursor

  < 4.0.7-1 | < 4.0.7-1 | < 4.0.7-1 | < 4.0.7-1

• powerdns•powerdns_recursor

  from 4.0.0 up to and including 4.0.6

• powerdns•recursor

  ≥ 4.0.0, ≤ 4.0.6

References (3)

• https://doc.powerdns.com/recursor/security-advisories/powerdns-advisory-2017-07.html
• http://www.securityfocus.com/bid/101982
• https://security-tracker.debian.org/tracker/CVE-2017-15094