CVE-2016-7072
An issue has been found in PowerDNS Authoritative Server before 3.4.11 and 4.0.2 allowing a remote, unauthenticated attacker to cause a denial of service by opening a large number of TCP connections to the web server.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (6.32%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
An issue has been found in PowerDNS Authoritative Server before 3.4.11 and 4.0.2 allowing a remote, unauthenticated attacker to cause a denial of service by opening a large number of TCP connections to the web server. If the web server runs out of file descriptors, it triggers an exception and terminates the whole PowerDNS process. While it's more complicated for an unauthorized attacker to make the web server run out of file descriptors since its connection will be closed just after being accepted, it might still be possible.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 6.32% probability · 93th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-20, CWE-400
- Affected
- powerdns/authoritative · debian/debian linux
- Source
- secalert@redhat.com
References
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7072Issue Tracking, Third Party Advisory
- https://doc.powerdns.com/md/security/powerdns-advisory-2016-03/Vendor Advisory
- https://www.debian.org/security/2017/dsa-3764Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7072Issue Tracking, Third Party Advisory
- https://doc.powerdns.com/md/security/powerdns-advisory-2016-03/Vendor Advisory
- https://www.debian.org/security/2017/dsa-3764Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.