CVE-2018-14626

PowerDNS Authoritative Server 4.1.0 up to 4.1.4 inclusive and PowerDNS Recursor 4.0.0 up to 4.1.4 inclusive are vulnerable to a packet cache pollution via crafted query that can lead to denial of service.

Weakness

The product does not properly control the allocation and maintenance of a limited resource.

Affected Software

Potential Mitigations

• Mitigation of resource exhaustion attacks requires that the target system either:

• The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.

• The second solution is simply difficult to effectively institute – and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/147.html
• https://cwe.mitre.org/data/definitions/227.html
• https://cwe.mitre.org/data/definitions/492.html

References

• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14626
• https://doc.powerdns.com/authoritative/security-advisories/powerdns-advisory-2018-05.html
• https://doc.powerdns.com/recursor/security-advisories/powerdns-advisory-2018-06.html
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14626
• https://doc.powerdns.com/authoritative/security-advisories/powerdns-advisory-2018-05.html
• https://doc.powerdns.com/recursor/security-advisories/powerdns-advisory-2018-06.html