vulnerability
ISC BIND: Preparing an NSEC3 closest encloser proof can exhaust CPU resources (CVE-2023-50868)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 8 | (AV:N/AC:L/Au:N/C:N/I:N/A:C) | Feb 15, 2024 | Feb 15, 2024 | Feb 20, 2025 |
Severity
8
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:C)
Published
Feb 15, 2024
Added
Feb 15, 2024
Modified
Feb 20, 2025
Description
The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC responses in a random subdomain attack, aka the "NSEC3" issue. The RFC 5155 specification implies that an algorithm must perform thousands of iterations of a hash function in certain situations.
Solution
upgrade-isc-bind-latest
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