Insufficient verification of data authenticity in PowerDNS Recursor - CVE-2025-59024
Published: October 22, 2025
Vulnerability identifier: #VU117537
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-59024
CWE-ID: CWE-345
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to poison DNS cache.
The vulnerability exists due to software does not apply strict enough validation of received delegation information. A remote attacker can use an UDP IP fragments attack to poison DNS cache of the server.
Affected software
PowerDNS Recursor
Debian Linux
Fedora
pdns-recursor (Debian package)
pdns-recursor
Debian Linux
Fedora
pdns-recursor (Debian package)
pdns-recursor
How to mitigate CVE-2025-59024
Install updates from vendor's website.
PowerDNS Recursor - addressed in versions 5.1.8, 5.2.6, 5.3.1
pdns-recursor (Debian package) - update to 5.2.6-0+deb13u1
pdns-recursor - addressed in versions 5.2.11-1.fc43, 5.4.3-1.el10_2, 5.4.3-1.el10_3, 5.4.3-1.fc44
pdns-recursor (Debian package) - update to 5.2.6-0+deb13u1
pdns-recursor - addressed in versions 5.2.11-1.fc43, 5.4.3-1.el10_2, 5.4.3-1.el10_3, 5.4.3-1.fc44