CVE-2022-22005
Published: 09 February 2022
Summary
CVE-2022-22005 is a high-severity Deserialization of Untrusted Data (CWE-502) vulnerability in Microsoft Sharepoint Server. Its CVSS base score is 8.8 (High).
Operationally, ranked in the top 9.7% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
Microsoft SharePoint Server is affected by CVE-2022-22005, a remote code execution vulnerability stemming from unsafe deserialization of untrusted data (CWE-502). The flaw carries a CVSS 3.1 base score of 8.8 and permits an attacker to execute arbitrary code on the server.
An authenticated user with low privileges can exploit the issue over the network without user interaction, achieving full confidentiality, integrity, and availability impact on the targeted SharePoint installation. Successful exploitation grants the attacker the ability to run code in the context of the SharePoint application pool or equivalent service account.
Microsoft has published remediation guidance and security updates for the vulnerability through its Security Response Center, directing administrators to apply the relevant patches for supported SharePoint Server versions. The associated EPSS scores remain modest, with a current value of 0.0537 and a recorded peak of 0.0712.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2022-27159
Vulnerability details
Microsoft SharePoint Server Remote Code Execution Vulnerability
- CWE(s)
Related Threats
Threat-Actor AttributionAI
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.