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) | 2024-02-15 | 2024-02-15 | 2025-02-20 |
Severity
8
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:C)
Published
2024-02-15
Added
2024-02-15
Modified
2025-02-20
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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