Input validation error in PowerDNS - CVE-2016-7073

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Main Vulnerability Database Vulnerabilities #VU32137

Input validation error in PowerDNS - CVE-2016-7073

Published: September 11, 2018 / Updated: July 28, 2020


Vulnerability identifier: #VU32137
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2016-7073
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote non-authenticated attacker to manipulate data.

An issue has been found in PowerDNS before 3.4.11 and 4.0.2, and PowerDNS recursor before 4.0.4, allowing an attacker in position of man-in-the-middle to alter the content of an AXFR because of insufficient validation of TSIG signatures. A missing check of the TSIG time and fudge values was found in AXFRRetriever, leading to a possible replay attack.


Affected software

PowerDNS
Arch Linux
Fedora
Cisco Secure Access Control
pdns (Alpine package)
pdns-recursor (Alpine package)
pdns
pdns-recursor

How to mitigate CVE-2016-7073

Install update from vendor's website.

PowerDNS - update to 3.4.11
pdns (Alpine package) - update to 4.0.3-r0
pdns-recursor (Alpine package) - update to 4.0.4-r0
pdns - addressed in versions 3.4.11-1.el7, 4.0.3-1.fc24, 4.0.3-1.fc25
pdns-recursor - addressed in versions 3.7.4-1.el6, 3.7.4-1.el7, 4.0.4-1.fc24, 4.0.4-1.fc25

External References

Related Security Bulletins