CVE-2023-36899
Published: 08 August 2023
Summary
CVE-2023-36899 is a high-severity Improper Input Validation (CWE-20) vulnerability in Microsoft .Net Framework. Its CVSS base score is 8.8 (High).
Operationally, ranked in the top 1.3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
CVE-2023-36899 is an elevation of privilege vulnerability affecting the ASP.NET component. It carries a CVSS 3.1 base score of 8.8 with the vector AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H and is also associated with CWE-20.
An attacker with low privileges and network access can exploit the flaw without user interaction to obtain high impact on confidentiality, integrity, and availability within the affected ASP.NET environment.
Microsoft has published guidance for the issue at the referenced security update page, which practitioners should consult for available patches and configuration changes.
The associated EPSS score has reached a peak of 0.7290 with a current value of 0.7004.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-40819
Vulnerability details
ASP.NET Elevation of Privilege Vulnerability
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Security testing and developer training directly verify and enforce proper input validation, reducing exploitability of injection and malformed-data weaknesses.
Security testing and evaluation at multiple SDLC stages directly detects missing or flawed input validation, with the required remediation process ensuring fixes are applied.
Directly implements checks on information inputs to reject invalid data before processing.
Spam protection mechanisms perform filtering and detection on inbound/outbound messages, directly compensating for missing or weak input validation of unsolicited content.