CVE-2016-7069

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-09-11 · updated 2026-06-17
Weakness: CWE-20

Description

An issue has been found in dnsdist before 1.2.0 in the way EDNS0 OPT records are handled when parsing responses from a backend. When dnsdist is configured to add EDNS Client Subnet to a query, the response may contain an EDNS0 OPT record that has to be removed before forwarding the response to the initial client. On a 32-bit system, the pointer arithmetic used when parsing the received response to remove that record might trigger an undefined behavior leading to a crash.

Affected products

PowerDNS DNSdist: through 1.2.0

References

http://www.securityfocus.com/bid/100509
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7069
https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2017-01.html
http://www.securityfocus.com/bid/100509
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7069
https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2017-01.html

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