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

http://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