Vulnerability 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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Powerdns | Dnsdist | <= 1.2.0 |
Related Weaknesses (CWE)
References
- http://www.securityfocus.com/bid/100509Third Party AdvisoryVDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7069Issue TrackingThird Party Advisory
- https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2017-01.htPatchVendor Advisory
- http://www.securityfocus.com/bid/100509Third Party AdvisoryVDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7069Issue TrackingThird Party Advisory
- https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2017-01.htPatchVendor Advisory
FAQ
What is CVE-2016-7069?
CVE-2016-7069 is a vulnerability with a CVSS score of 5.9 (MEDIUM). 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 res...
How severe is CVE-2016-7069?
CVE-2016-7069 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2016-7069?
Check the references section above for vendor advisories and patch information. Affected products include: Powerdns Dnsdist.