CVE-2016-7069
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (4.58%). 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 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.
- 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
- 4.58% probability · 92th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- powerdns/dnsdist
- Source
- secalert@redhat.com
EPSS 4.6% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.