CVE-2023-23409
Published: 14 March 2023
Summary
CVE-2023-23409 is a medium-severity Improper Input Validation (CWE-20) vulnerability in Microsoft Windows Server 2008. Its CVSS base score is 5.5 (Medium).
Operationally, ranked in the top 8.8% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
CVE-2023-23409 is an information disclosure vulnerability in the Client Server Run-Time Subsystem (CSRSS) component of Windows. It carries a CVSS 3.1 base score of 5.5 and is associated with CWE-20 and CWE-668. The flaw was published on 14 March 2023.
An attacker with local access and low privileges can exploit the issue without user interaction to read sensitive information from memory. The vulnerability permits high confidentiality impact while leaving integrity and availability unaffected.
Microsoft published an advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-23409 that addresses the flaw. The associated EPSS score has remained flat at a peak of 0.0631 with no material increase after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-27509
Vulnerability details
Client Server Run-Time Subsystem (CSRSS) Information Disclosure 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.
Controls whether organization resources are exposed to external system spheres by permitting or prohibiting their use.
The control ensures information is not released into a security sphere where the recipient lacks matching access authorizations.
The control ensures information resources are not exposed to the incorrect (public) sphere through review and authorization.
Protects against data mining that would expose resources to unauthorized spheres by enforcing detection and controls.
Restricts information flows to ensure resources are not exposed to incorrect or unauthorized spheres.
Controlling internal connections prevents exposure of resources to unintended internal spheres.
Knowing exact processing and storage locations helps avoid exposure of resources to incorrect spheres.
The control prevents exposure of the media resource to the wrong security sphere.