Vulnerability CVE-2016-7069


Published: 2018-09-11

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.

Type:

CWE-20

(Improper Input Validation)

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Powerdns -> Dnsdist 

 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

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