{"id":"UBUNTU-CVE-2016-7069","details":"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.","modified":"2025-10-24T04:45:52Z","published":"2018-09-11T13:29:00Z","upstream":["CVE-2016-7069"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2016-7069"},{"type":"REPORT","url":"https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2017-01.html"},{"type":"REPORT","url":"https://downloads.powerdns.com/patches/2017-01"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2016-7069"}],"affected":[{"package":{"name":"dnsdist","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/dnsdist@1.0.0~alpha2-1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.0~alpha2-1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.0.0~alpha2-1","binary_name":"dnsdist"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-7069.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}