Current Description
An issue has been found in PowerDNS Recursor from 4.0.0 up to and including 4.1.4. A remote attacker sending a DNS query for a meta-type like OPT can lead to a zone being wrongly cached as failing DNSSEC validation. It only arises if the parent zone is signed, and all the authoritative servers for that parent zone answer with FORMERR to a query for at least one of the meta-types. As a result, subsequent queries from clients requesting DNSSEC validation will be answered with a ServFail.
Source:
MITRE
Description Last Modified:
11/09/2018
View Analysis Description
Analysis Description
An issue has been found in PowerDNS Recursor from 4.0.0 up to and including 4.1.4. A remote attacker sending a DNS query for a meta-type like OPT can lead to a zone being wrongly cached as failing DNSSEC validation. It only arises if the parent zone is signed, and all the authoritative servers for that parent zone answer with FORMERR to a query for at least one of the meta-types. As a result, subsequent queries from clients requesting DNSSEC validation will be answered with a ServFail.
Source:
MITRE
Description Last Modified:
11/09/2018
Impact
CVSS v3.0 Severity and Metrics:
Base Score:
5.9 MEDIUM
Vector:
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
(V3 legend)
Impact Score:
3.6
Exploitability Score:
2.2
Attack Vector (AV):
Network
Attack Complexity (AC):
High
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
None
Integrity (I):
None
Availability (A):
High
CVSS v2.0 Severity and Metrics:
Base Score:
4.3 MEDIUM
Vector:
(AV:N/AC:M/Au:N/C:N/I:N/A:P)
(V2 legend)
Impact Subscore:
2.9
Exploitability Subscore:
8.6
Access Vector (AV):
Network
Access Complexity (AC):
Medium
Authentication (AU):
None
Confidentiality (C):
None
Integrity (I):
None
Availability (A):
Partial
Additional Information:
Allows disruption of service
References to Advisories, Solutions, and Tools
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Change History
1 change record found
- show changes
Initial Analysis -
1/30/2019 2:57:29 PM
| Action |
Type |
Old Value |
New Value |
| Added |
CPE Configuration |
|
OR
*cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:* versions from (including) 4.0.0 up to (including) 4.1.4 |
| Added |
CVSS V2 |
|
(AV:N/AC:M/Au:N/C:N/I:N/A:P) |
| Added |
CVSS V3 |
|
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
| Added |
CWE |
|
CWE-20 |
| Changed |
Reference Type |
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14644 No Types Assigned |
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14644 Issue Tracking, Third Party Advisory |
| Changed |
Reference Type |
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2018-07.html No Types Assigned |
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2018-07.html Vendor Advisory |