#VU117604 Predictable Seed in Pseudo-Random Number Generator (PRNG) in ISC BIND - CVE-2025-40780

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Main Vulnerability Database Vulnerabilities #VU117604

#VU117604 Predictable Seed in Pseudo-Random Number Generator (PRNG) in ISC BIND - CVE-2025-40780

Published: October 23, 2025


Vulnerability identifier: #VU117604
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N/E:U/U:Green
CVE-ID: CVE-2025-40780
CWE-ID: CWE-337
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
ISC BIND
Software vendor:
ISC

Description

The vulnerability allows a remote attacker to poison DNS cache.

The vulnerability exists due to weakness in the Pseudo Random Number Generator (PRNG). A remote attacker can predict the source port and query ID that BIND will use and perform DNS cache poisoning attacks.


Remediation

Install updates from vendor's website.

External links