CVE-2016-7069

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.

• CWE-20
• CWE-20

• http://www.securityfocus.com/bid/100509Third Party Advisory, VDB Entry
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7069Issue Tracking, Third Party Advisory
• https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2017-01.htmlPatch, Vendor Advisory
• http://www.securityfocus.com/bid/100509Third Party Advisory, VDB Entry
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7069Issue Tracking, Third Party Advisory
• https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2017-01.htmlPatch, Vendor Advisory

Published

Sep 11, 2018

Last Modified

Jun 17, 2026

Status

Modified

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