Double Free in PowerDNS Authoritative - CVE-2020-24698
Published: September 28, 2020 / Updated: February 7, 2021
Vulnerability identifier: #VU47126
CSH Severity: Medium
CVSS v4.0: 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-2020-24698
CWE-ID: CWE-415
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: PowerDNS.COM B.V.
Affected software:
PowerDNS Authoritative
PowerDNS Authoritative
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing queries with a GSS-TSIG signature. A remote attacker can pass specially crafted DNS query to the application, trigger double free error and execute arbitrary code on the target system.
Successful exploitation of the vulnerability requires that the application is compiled with –enable-experimental-gss-tsig flag.
How to mitigate CVE-2020-24698
Install update from vendor's website.