#VU45821 Reachable Assertion in ISC BIND - CVE-2020-8620
Published: August 20, 2020
Vulnerability identifier: #VU45821
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Green
CVE-ID: CVE-2020-8620
CWE-ID: CWE-617
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerable software:
ISC BIND
ISC BIND
Software vendor:
ISC
ISC
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a reachable assertion in tcpdns.c when processing large TCP payloads. An attacker who can establish a TCP connection with the server and send data on that connection can exploit this to trigger the assertion failure, causing the server to exit.
Remediation
Install updates from vendor's website.