Memory leak in PowerDNS Recursor - CVE-2017-15094

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Main Vulnerability Database Vulnerabilities #VU9441

Memory leak in PowerDNS Recursor - CVE-2017-15094

Published: November 29, 2017


Vulnerability identifier: #VU9441
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-15094
CWE-ID: CWE-401
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists due to a flaw in the DNSSEC parsing code of PowerDNS Recursor during a code audit by Nixu. A remote attacker can supply specially crafted DNSSEC ECDSA keys, parse it when validation is enabled by setting dnssec to a value other than off or process-no-validate (default), trigger memory leak and cause the service to crash.


Affected software

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

How to mitigate CVE-2017-15094

Update PowerDNS Recursor to version 4.0.7.

pdns-recursor (Alpine package) - update to 4.0.7-r0
pdns-recursor - addressed in versions 4.0.7-1.fc25, 4.0.7-1.fc26, 4.0.7-1.fc27, 4.1.3-2.el7, 4.1.3-2.fc27

External References

Related Security Bulletins