vulnerability
Microsoft Windows: CVE-2023-50868: MITRE: CVE-2023-50868 NSEC3 closest encloser proof can exhaust CPU
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 8 | (AV:N/AC:L/Au:N/C:N/I:N/A:C) | 06/11/2024 | 06/11/2024 | 09/11/2024 |
Severity
8
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:C)
Published
06/11/2024
Added
06/11/2024
Modified
09/11/2024
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(s)
microsoft-windows-windows_server_2012-kb5039260microsoft-windows-windows_server_2012_r2-kb5039294microsoft-windows-windows_server_2016-1607-kb5039214microsoft-windows-windows_server_2019-1809-kb5039217microsoft-windows-windows_server_2022-21h2-kb5039227microsoft-windows-windows_server_2022-22h2-kb5039227microsoft-windows-windows_server_2022-23h2-kb5039236
References
- CVE-2023-50868
- https://attackerkb.com/topics/CVE-2023-50868
- URL-https://support.microsoft.com/help/5039214
- URL-https://support.microsoft.com/help/5039217
- URL-https://support.microsoft.com/help/5039227
- URL-https://support.microsoft.com/help/5039236
- URL-https://support.microsoft.com/help/5039260
- URL-https://support.microsoft.com/help/5039294
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