CVE-2023-29357: Microsoft SharePoint Server Elevation of Privilege Vulnerability
First published: Tue Jun 13 2023(Updated: )
Microsoft SharePoint Server contains an unspecified vulnerability that allows an unauthenticated attacker, who has gained access to spoofed JWT authentication tokens, to use them for executing a network attack. This attack bypasses authentication, enabling the attacker to gain administrator privileges.
Credit: secure@microsoft.com secure@microsoft.com secure@microsoft.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Microsoft SharePoint Server | =2019 | |
| Microsoft SharePoint Server 2019 | ||
Remedy
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
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Reference Links
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-29357 (Advisory)
- https://www.theregister.com/2024/01/12/microsoft_sharepoint_vuln_exploit/
- https://www.bleepingcomputer.com/news/security/cisa-tags-microsoft-sharepoint-rce-bug-as-actively-exploited/
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-29357;
- https://nvd.nist.gov/vuln/detail/CVE-2023-29357
Frequently Asked Questions
What is CVE-2023-29357?
CVE-2023-29357 is a vulnerability in Microsoft SharePoint Server that allows an attacker to elevate their privileges.
How severe is CVE-2023-29357?
CVE-2023-29357 has a severity rating of critical, with a severity value of 9.
Which version of Microsoft SharePoint Server is affected by CVE-2023-29357?
Microsoft SharePoint Server 2019 is affected by CVE-2023-29357.
How can I fix CVE-2023-29357?
To fix CVE-2023-29357, apply the relevant patches provided by Microsoft.
Where can I find more information about CVE-2023-29357?
You can find more information about CVE-2023-29357 on the Microsoft Security Response Center website.
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