#VU29151 Reachable Assertion in ISC BIND - CVE-2020-8619
Published: June 19, 2020
Vulnerability identifier: #VU29151
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-8619
CWE-ID: CWE-617
Exploitation vector: Remote access
Exploit availability:
No public exploit 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 when processing entries with an asterisk ("*") character in rbtdb.c. Unless a nameserver is providing authoritative service for one or more zones and at least one zone contains an empty non-terminal entry containing an asterisk ("*") character, an attacker with ability to change zone content can trigger assertion failure and perform a denial of service (DoS) attack.
Note, this vulnerability may affect hosting provider that allow users access to domain management functionality.
Remediation
Install updates from vendor's website.