#VU52737 Buffer overflow in ISC BIND - CVE-2021-25216
Published: April 29, 2021
Vulnerability identifier: #VU52737
Vulnerability risk: High
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:Amber
CVE-ID: CVE-2021-25216
CWE-ID: CWE-119
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 execute arbitrary code on the target system.
The vulnerability exists due to a boundary error within the GSS-TSIG extension. A remote attacker can send specially crafted requests to the server, trigger buffer overflow and execute arbitrary code on the system.
Successful exploitation of the vulnerability requires that named is configure to use SPNEGO implementation by setting values for the tkey-gssapi-keytab or tkey-gssapi-credential configuration options (often used with Samba as well as in mixed-server environments that combine BIND servers with Active Directory domain controllers).
Remediation
Install updates from vendor's website.