Vulnerability Details

PowerDNS Security Advisory 2016-04: Insufficient validation of TSIG signatures

Published: 2018-09-12 14:54:11
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:N/AC:M/Au:N/C:N/I:P/A:N

Detection Type:
Remote Banner Unreliable

Solution Type:
Vendor Patch

Summary:
Two issues have been found in PowerDNS Authoritative Server allowing an attacker in position of man-in-the-middle to alter the content of an AXFR because of insufficient validation of TSIG signatures. The first issue is a missing check of the TSIG time and fudge values in AXFRRetriever, leading to a possible replay attack. This issue has been assigned CVE-2016-7073. The second issue is a missing check that the TSIG record is the last one, leading to the possibility of parsing records that are not covered by the TSIG signature. This issue has been assigned CVE-2016-7074.

Detection Method:
Checks if a vulnerable version is present on the target host.

Affected Versions:
PowerDNS Authoritative Server up to and including 3.4.10 and 4.0.1 are affected. PowerDNS Recursor from 4.0.0 up to and including 4.0.3 are affected.

Recommendations:
Update PowerDNS Authoritative Server to version 3.4.11 or 4.0.2 respectively. Update PowerDNS Recursor 4.x.x to version 4.0.4.

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2016-7073
https://nvd.nist.gov/vuln/detail/CVE-2016-7074

References:

https://doc.powerdns.com/md/security/powerdns-advisory-2016-04/

Severity
Medium
CVSS Score
4.3
Published
2018-09-12
Modified
2018-11-21
Category
General

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