CVE-2015-5470

Severity: high (CVSS 7.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 11.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2015-11-02 · updated 2026-06-17
Weakness: CWE-399

Description

The label decompression functionality in PowerDNS Recursor before 3.6.4 and 3.7.x before 3.7.3 and Authoritative (Auth) Server before 3.3.3 and 3.4.x before 3.4.5 allows remote attackers to cause a denial of service (CPU consumption or crash) via a request with a long name that refers to itself. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-1868.

Affected products

PowerDNS Authoritative: through 3.3.2; 3.4.0, 3.4.1, 3.4.2, 3.4.3, 3.4.4
PowerDNS Recursor: through 3.6.3; 3.7.1, 3.7.2

References

http://www.openwall.com/lists/oss-security/2015/07/07/6
http://www.openwall.com/lists/oss-security/2015/07/10/8
https://doc.powerdns.com/md/security/powerdns-advisory-2015-01/
http://www.openwall.com/lists/oss-security/2015/07/07/6
http://www.openwall.com/lists/oss-security/2015/07/10/8
https://doc.powerdns.com/md/security/powerdns-advisory-2015-01/

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