Security restrictions bypass in PowerDNS Recursor - CVE-2019-3806

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Main Vulnerability Database Vulnerabilities #VU17347

Security restrictions bypass in PowerDNS Recursor - CVE-2019-3806

Published: February 1, 2019


Vulnerability identifier: #VU17347
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-3806
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to bypass security restrictions.

The vulnerability exists due to Lua hooks are not properly applied to queries received over TCP in some specific combination of settings. A remote attacker can bypass security policies enforced using Lua.


Affected software

PowerDNS Recursor
Arch Linux
Fedora
pdns-recursor (Alpine package)
pdns-recursor

How to mitigate CVE-2019-3806

Update to version 4.1.9.

PowerDNS Recursor - update to 4.1.9
pdns-recursor (Alpine package) - update to 4.1.9-r0
pdns-recursor - addressed in versions 4.1.9-1.el7, 4.1.9-1.fc28, 4.1.9-1.fc29

External References

Related Security Bulletins