Multiple vulnerabilities in Microsoft SharePoint Server
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2023-21744 CVE-2023-21742 CVE-2023-21743 |
| CWE-ID | CWE-20 CWE-254 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #2 is available. |
| Vulnerable software |
Microsoft SharePoint Server Subscription Edition Server applications / Application servers Microsoft SharePoint Server Server applications / Application servers Microsoft SharePoint Foundation Server applications / Application servers Microsoft SharePoint Enterprise Server Server applications / Application servers |
| Vendor | Microsoft |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Input validation error
EUVDB-ID: #VU70957
Risk: Medium
CVSSv4.0: 6.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2023-21744
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the system.
The vulnerability exists due to insufficient validation of user-supplied input in Microsoft SharePoint Server. A remote user can pass specially crafted input to the application and execute arbitrary code on the target system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsMicrosoft SharePoint Server Subscription Edition: All versions
Microsoft SharePoint Server: 2019
Microsoft SharePoint Foundation: 2013 Service Pack 1
Microsoft SharePoint Enterprise Server: 2013 Service Pack 1 - 2016
CPE2.3- cpe:2.3:a:microsoft:microsoft_sharepoint_server_subscription_edition:*:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_sharepoint_server:2019:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_sharepoint_foundation:2013 Service Pack 1:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_sharepoint_enterprise_server:2013:Service Pack 1:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_sharepoint_enterprise_server:2016:*:*:*:*:*:*:*
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-21744
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Input validation error
EUVDB-ID: #VU70958
Risk: Medium
CVSSv4.0: 7.4 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Green]
CVE-ID: CVE-2023-21742
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the system.
The vulnerability exists due to insufficient validation of user-supplied input in Microsoft SharePoint Server. A remote user can pass specially crafted input to the application and execute arbitrary code on the target system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsMicrosoft SharePoint Server Subscription Edition: All versions
Microsoft SharePoint Server: 2019
Microsoft SharePoint Foundation: 2013 Service Pack 1
Microsoft SharePoint Enterprise Server: 2013 Service Pack 1 - 2016
CPE2.3- cpe:2.3:a:microsoft:microsoft_sharepoint_server_subscription_edition:*:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_sharepoint_server:2019:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_sharepoint_foundation:2013 Service Pack 1:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_sharepoint_enterprise_server:2013:Service Pack 1:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_sharepoint_enterprise_server:2016:*:*:*:*:*:*:*
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2023-21742
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
3) Security features bypass
EUVDB-ID: #VU70959
Risk: Medium
CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2023-21743
CWE-ID:
CWE-254 - Security Features
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to security features bypass in Microsoft SharePoint Server. A remote attacker can bypass authentication and make an anonymous connection.
MitigationInstall updates from vendor's website.
Vulnerable software versionsMicrosoft SharePoint Server Subscription Edition: All versions
Microsoft SharePoint Server: 2019
Microsoft SharePoint Enterprise Server: 2016
CPE2.3- cpe:2.3:a:microsoft:microsoft_sharepoint_server_subscription_edition:*:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_sharepoint_server:2019:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_sharepoint_enterprise_server:2016:*:*:*:*:*:*:*
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-21743
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
