CVE-2023-36038
Published: 14 November 2023
Summary
CVE-2023-36038 is a high-severity Uncontrolled Resource Consumption (CWE-400) vulnerability in Microsoft .Net. Its CVSS base score is 8.2 (High).
Operationally, ranked in the top 7.3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
ASP.NET Core contains a denial of service vulnerability tracked as CVE-2023-36038. The flaw is associated with CWE-400 and carries a CVSS 3.1 score of 8.2 reflecting network attack vector, low complexity, and no required privileges or user interaction, resulting in no confidentiality impact, limited integrity impact, and high availability impact.
An unauthenticated remote attacker can send crafted requests to an affected ASP.NET Core application, triggering excessive resource consumption that leads to denial of service while also permitting limited integrity changes.
Microsoft has published guidance for the issue at the MSRC update guide, which security teams should consult for available patches and configuration changes that address the vulnerability.
The associated EPSS score has remained flat at 0.0875 with no material increase since disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-40022
Vulnerability details
ASP.NET Core 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
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.
Limiting concurrent sessions directly prevents uncontrolled resource consumption by capping the number of active sessions per user or account.
Analysis identifies uncontrolled resource consumption indicative of denial-of-service or abuse attempts.
Contingency plan testing includes resource exhaustion scenarios to verify recovery, making it harder for attackers to sustain exploits that cause uncontrolled consumption.
Updated contingency plans include current procedures to detect, contain, and recover from resource exhaustion, limiting an attacker's ability to sustain impact from uncontrolled consumption.
Alternate site allows resumption of operations if resource exhaustion at the primary site is exploited to cause unavailability.
Alternate telecommunications services enable resumption of essential functions when primary services become unavailable due to uncontrolled resource consumption.
The team can analyze and respond to resource exhaustion incidents, reducing the impact of attacks that exploit uncontrolled consumption weaknesses.
Timely maintenance support and spare parts enable rapid recovery from failures induced by uncontrolled resource consumption, shortening the impact window of denial-of-service attacks.