Reachable assertion in ISC BIND - CVE-2025-40775
Published: May 21, 2025 / Updated: May 23, 2025
Vulnerability identifier: #VU109620
CSH Severity: Medium
CVSS v4.0: 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-2025-40775
CWE-ID: CWE-617
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vendor: ISC
Affected software:
ISC BIND
ISC BIND
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a reachable assertion when handling transaction signature (TSIG) in incoming DNS messages. A remote attacker can send specially crafted DNS messages to the affected server and perform a denial of service (DoS) attack.
How to mitigate CVE-2025-40775
Install updates from vendor's website.