#VU47124 Race condition in PowerDNS Authoritative - CVE-2020-24696
Published: September 28, 2020 / Updated: February 7, 2021
Vulnerability identifier: #VU47124
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-24696
CWE-ID: CWE-362
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
PowerDNS Authoritative
PowerDNS Authoritative
Software vendor:
PowerDNS.COM B.V.
PowerDNS.COM B.V.
Description
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to a race condition when processing queries with a GSS-TSIG signature. A remote attacker can exploit the race and crash the server or execute arbitrary code on the system.
Successful exploitation of the vulnerability requires that the application is compiled with –enable-experimental-gss-tsig flag.
Remediation
Install update from vendor's website.