Arch Linux Security Advisory ASA-201711-30
=========================================
Severity: Low
Date    : 2017-11-27
CVE-ID  : CVE-2017-15091
Package : powerdns
Type    : access restriction bypass
Remote  : Yes
Link    : https://security.archlinux.org/AVG-519

Summary
======
The package powerdns before version 4.0.5-1 is vulnerable to access
restriction bypass.

Resolution
=========
Upgrade to 4.0.5-1.

# pacman -Syu "powerdns>=4.0.5-1"

The problem has been fixed upstream in version 4.0.5.

Workaround
=========
None.

Description
==========
An issue has been found in the API component of PowerDNS Authoritative
< 4.0.5, where some operations that have an impact on the state of the
server are still allowed even though the API has been configured as
read-only via the 'api-readonly' keyword. This missing check allows an
attacker with valid API credentials could flush the cache, trigger a
zone transfer or send a NOTIFY.

Impact
=====
A remote, authenticated attacker can flush the cache, trigger a zone
transfer or send a NOTIFY through the API even though it was configured
as read-only.

References
=========
https://seclists.org/oss-sec/2017/q4/329
https://doc.powerdns.com/authoritative/security-advisories/powerdns-advisory-2017-04.html
https://github.com/PowerDNS/pdns/commit/245a2c8211db2f6c5771f93671e4eb80d4e0a0c7
https://security.archlinux.org/CVE-2017-15091