CVE-2016-6172

Severity: medium (CVSS 6.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-09-26 · updated 2026-06-17
Weakness: CWE-400

Description

PowerDNS (aka pdns) Authoritative Server before 4.0.1 allows remote primary DNS servers to cause a denial of service (memory exhaustion and secondary DNS server crash) via a large (1) AXFR or (2) IXFR response.

Affected products

openSUSE Leap: 42.1
Opensuse: 13.2
PowerDNS Authoritative Server: through 4.0.0

References

http://lists.opensuse.org/opensuse-updates/2016-08/msg00085.html
http://www.debian.org/security/2016/dsa-3664
http://www.openwall.com/lists/oss-security/2016/07/06/3
http://www.securityfocus.com/bid/91678
http://www.securitytracker.com/id/1036242
https://doc.powerdns.com/md/changelog/#powerdns-authoritative-server-401
https://github.com/PowerDNS/pdns/issues/4128
https://github.com/PowerDNS/pdns/issues/4133
https://github.com/PowerDNS/pdns/pull/4134
https://github.com/sischkg/xfer-limit/blob/master/README.md
https://lists.dns-oarc.net/pipermail/dns-operations/2016-July/015058.html
http://lists.opensuse.org/opensuse-updates/2016-08/msg00085.html

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