CVE-2016-7069

low-risk
Published 2018-09-11

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.

Do I need to act?

-
0.02% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.9/10 Medium
NETWORK / HIGH complexity

Affected Products (1)

Dnsdist

Affected Vendors

Powerdns

References (6)

Third Party Advisory http://www.securityfocus.com/bid/100509
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7069
Patch https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2017-01.ht...
Third Party Advisory http://www.securityfocus.com/bid/100509
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7069
Patch https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2017-01.ht...
23
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal