What’s Vulnerable › Vulnerabilities

CVE-2016-5427

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 63.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2016-09-21 · updated 2026-06-17
• Weakness: CWE-399

Description

PowerDNS (aka pdns) Authoritative Server before 3.4.10 does not properly handle a . (dot) inside labels, which allows remote attackers to cause a denial of service (backend CPU consumption) via a crafted DNS query.

Affected products

• PowerDNS Authoritative: through 3.4.9

References

• http://www.debian.org/security/2016/dsa-3664
• http://www.openwall.com/lists/oss-security/2016/09/09/3
• http://www.securityfocus.com/bid/92917
• http://www.securitytracker.com/id/1036761
• https://doc.powerdns.com/md/security/powerdns-advisory-2016-01/
• https://github.com/PowerDNS/pdns/commit/881b5b03a590198d03008e4200dd00cc537712f3
• http://www.debian.org/security/2016/dsa-3664
• http://www.openwall.com/lists/oss-security/2016/09/09/3
• http://www.securityfocus.com/bid/92917
• http://www.securitytracker.com/id/1036761
• https://doc.powerdns.com/md/security/powerdns-advisory-2016-01/
• https://github.com/PowerDNS/pdns/commit/881b5b03a590198d03008e4200dd00cc537712f3

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