CVE-2023-32031
Published: 14 June 2023
Summary
CVE-2023-32031 is a high-severity Deserialization of Untrusted Data (CWE-502) vulnerability in Microsoft Exchange Server. Its CVSS base score is 8.8 (High).
Operationally, ranked in the top 2.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
Microsoft Exchange Server is affected by CVE-2023-32031, a remote code execution vulnerability published on 2023-06-14 and assigned a CVSS 3.1 base score of 8.8. The flaw is associated with CWE-502 and permits an attacker to execute arbitrary code on the server.
An authenticated attacker with low privileges can exploit the issue over the network without user interaction, resulting in full compromise of confidentiality, integrity, and availability on the targeted Exchange Server.
Microsoft has published remediation guidance and patches through its Security Response Center at the listed advisory URL; administrators should apply the updates corresponding to their Exchange Server version to address the vulnerability. The associated EPSS score stands at 0.4775.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-36318
Vulnerability details
Microsoft Exchange Server Remote Code Execution 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.
Penetration testing supplies malicious serialized objects, detecting unsafe deserialization and supporting corrective actions.
Evaluation of untrusted data handling (deserialization testing) reveals unsafe processing, which the required remediation process addresses.
Untrusted serialized data can be deserialized and observed inside the chamber, blocking gadget-chain exploitation outside the sandbox.
Validates or rejects untrusted serialized data before deserialization occurs.
Identifies and blocks malicious code introduced through deserialization of untrusted data at system boundaries.
Integrity verification of serialized information can detect tampering before deserialization occurs.
Provenance of associated data allows detection of untrusted sources before deserialization or processing occurs.