CVE-2016-7069

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.

Score

CVSS 3.0 7.5 High

Status

Modified - secalert@redhat.com

Published

2018-09-11

Last modified

2024-08-06

Weaknesses

CWE-20

Affected products

• Dnsdist (Open-xchange)
• Dnsdist (Powerdns)

References

• http://www.securityfocus.com/bid/100509
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7069
• https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2017-01.html