CVE-2023-21700
Published: 14 February 2023
Summary
CVE-2023-21700 is a high-severity NULL Pointer Dereference (CWE-476) vulnerability in Microsoft Windows Server 2008. Its CVSS base score is 7.5 (High).
Operationally, ranked in the top 3.5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
CVE-2023-21700 is a denial-of-service vulnerability in the Windows iSCSI Discovery Service, assigned a CVSS 3.1 base score of 7.5 with the vector AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H and linked to CWE-476. The flaw permits remote attackers to disrupt the service without authentication or user interaction.
An unauthenticated network attacker can send crafted requests that trigger the vulnerability, resulting in high-impact loss of availability for the affected iSCSI component while leaving confidentiality and integrity unaffected.
Microsoft published an advisory for CVE-2023-21700 that describes the issue and supplies remediation guidance; the advisory is available at the Microsoft Security Response Center link referenced in the CVE record.
The associated EPSS score reached a peak of 0.2664 with no subsequent material increase from that level.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-25867
Vulnerability details
Windows iSCSI Discovery Service Denial of Service Vulnerability
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.