CVE-2021-27076
Microsoft SharePoint Server RCE Bug
Description
Microsoft SharePoint Server Remote Code Execution Vulnerability
INFO
Published Date :
March 11, 2021, 4:15 p.m.
Last Modified :
Nov. 21, 2024, 5:57 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2021-27076
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Apply the appropriate Microsoft security updates.
- Reboot the server if prompted.
Public PoC/Exploit Available at Github
CVE-2021-27076 has a 9 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-27076.
| URL | Resource |
|---|---|
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27076 | Patch Vendor Advisory |
| https://www.zerodayinitiative.com/advisories/ZDI-21-276/ | Third Party Advisory |
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27076 | Patch Vendor Advisory |
| https://www.zerodayinitiative.com/advisories/ZDI-21-276/ | Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-27076 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-27076
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
C#
None
C#
Resources to learn about Insecure Deserialization
None
None
C#
差异：输出macos 能运行的工具
C#
Deserialization payload generator for a variety of .NET formatters
C#
None
Deserialization payload generator for a variety of .NET formatters
C#
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-27076 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-27076 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27076 Added Reference https://www.zerodayinitiative.com/advisories/ZDI-21-276/ -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Dec. 29, 2023
Action Type Old Value New Value Added CVSS V3.1 Microsoft Corporation AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H -
Initial Analysis by [email protected]
Mar. 16, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:S/C:P/I:P/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27076 No Types Assigned https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27076 Patch, Vendor Advisory Changed Reference Type https://www.zerodayinitiative.com/advisories/ZDI-21-276/ No Types Assigned https://www.zerodayinitiative.com/advisories/ZDI-21-276/ Third Party Advisory Added CWE NIST NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:a:microsoft:business_productivity_servers:2010:sp2:*:*:*:*:*:* *cpe:2.3:a:microsoft:sharepoint_foundation:2013:sp1:*:*:*:*:*:* *cpe:2.3:a:microsoft:sharepoint_server:2016:*:*:*:enterprise:*:*:* *cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Mar. 11, 2021
Action Type Old Value New Value Added Reference https://www.zerodayinitiative.com/advisories/ZDI-21-276/ [No Types Assigned]
Vulnerability Scoring Details
Base CVSS Score: 8.8
Base CVSS Score: 6.5
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
9.19 }} 0.15%
score
0.92358
percentile