CVE-2016-7069
mediumpriority · track · 32EPSS 0.046 · 92 %ileEUUSEPSS · scored 2026-10-28
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
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
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references (11)
External citations — patches, advisories, analysis.
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7069cnnvd
- https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2017-01.htmlcnnvd
- https://www.auscert.org.au/bulletins/ESB-2023.3797cnnvd
- https://www.auscert.org.au/bulletins/ESB-2023.3811cnnvd
- https://www.securityfocus.com/bid/100509cnnvd
- http://www.securityfocus.com/bid/100509enisa_euvd
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7069enisa_euvd
- https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2017-01.htmlenisa_euvd
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