DNSSEC Bypass Vulnerability in PowerDNS Recursor by PowerDNS
CVE-2020-12244

7.5HIGH

Key Information:

Vendor
Powerdns
Status
Recursor
Vendor
CVE Published:
19 May 2020

Summary

A vulnerability was identified in PowerDNS Recursor versions 4.1.0 to 4.3.0 that allows an attacker to bypass DNSSEC validation. This occurs when records in the answer section of a NXDOMAIN response, which lack an SOA, are not properly validated within the SyncRes::processAnswer function. This flaw raises concerns for users relying on DNSSEC for protection, as it permits malicious actors to execute DNS spoofing attacks, compromising the integrity of DNS responses.

References

https://doc.powerdns.com/recursor/security-advisories/pow...
x_refsource_CONFIRM
http://www.openwall.com/lists/oss-security/2020/05/19/3
mailing-listx_refsource_MLIST
https://www.debian.org/security/2020/dsa-4691
vendor-advisoryx_refsource_DEBIAN

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.