Multiple vulnerabilities in Microsoft SharePoint
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 8 |
| CVE-ID | CVE-2020-16944 CVE-2020-16953 CVE-2020-16948 CVE-2020-16942 CVE-2020-16941 CVE-2020-16952 CVE-2020-16951 CVE-2020-16950 |
| CWE-ID | CWE-79 CWE-125 CWE-200 CWE-20 |
| Exploitation vector | Network |
| Public exploit |
Public exploit code for vulnerability #6 is available. Public exploit code for vulnerability #7 is available. |
| Vulnerable software Subscribe |
Microsoft SharePoint Server Server applications / Application servers Microsoft SharePoint Foundation Server applications / Application servers |
| Vendor | Microsoft |
Security Bulletin
This security bulletin contains information about 8 vulnerabilities.
1) Cross-site scripting
EUVDB-ID: #VU47569
Risk: Low
CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-16944
CWE-ID:
CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Exploit availability: No
DescriptionThe disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data in the SharePoint server. A remote authenticated attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
MitigationInstall updates from vendor's website.
Vulnerable software versionsMicrosoft SharePoint Server: 2016 - 2019
Microsoft SharePoint Server: 2013
External linkshttp://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16944
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) Out-of-bounds read
EUVDB-ID: #VU47576
Risk: Low
CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-16953
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: No
DescriptionThe vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition when handling objects in memory within Microsoft SharePoint Server. A local user can create a specially crafted application and gain access to memory contents of an elevated process.
MitigationInstall update from vendor's website.
Vulnerable software versionsMicrosoft SharePoint Server: 2016 - 2019
Microsoft SharePoint Foundation: 2010 Service Pack 2 - 2013
External linkshttp://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16953
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Out-of-bounds read
EUVDB-ID: #VU47575
Risk: Low
CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-16948
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: No
DescriptionThe vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition when handling objects in memory within Microsoft SharePoint Server. A local user can create a specially crafted application and gain access to memory contents of an elevated process.
MitigationInstall update from vendor's website.
Vulnerable software versionsMicrosoft SharePoint Server: 2016 - 2019
Microsoft SharePoint Foundation: 2010 Service Pack 2 - 2013
External linkshttp://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16948
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
4) Information disclosure
EUVDB-ID: #VU47574
Risk: Low
CVSSv3.1: 3.6 [CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-16942
CWE-ID:
CWE-200 - Information exposure
Exploit availability: No
DescriptionThe vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to the Microsoft SharePoint Server improperly discloses its folder structure when rendering specific web pages. A local administrator can access to the specific SharePoint page and gain unauthorized access to sensitive information on the system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsMicrosoft SharePoint Server: 2016 - 2019
Microsoft SharePoint Foundation: 2010 Service Pack 2 - 2013
External linkshttp://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16942
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
5) Information disclosure
EUVDB-ID: #VU47573
Risk: Low
CVSSv3.1: 3.6 [CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-16941
CWE-ID:
CWE-200 - Information exposure
Exploit availability: No
DescriptionThe vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to the Microsoft SharePoint Server improperly discloses its folder structure when rendering specific web pages. A local administrator can access to the specific SharePoint page and gain unauthorized access to sensitive information on the system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsMicrosoft SharePoint Server: 2016 - 2019
Microsoft SharePoint Foundation: 2010 Service Pack 2 - 2013
External linkshttp://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16941
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
6) Input validation error
EUVDB-ID: #VU47572
Risk: High
CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-16952
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to the Microsoft SharePoint fails to check the source markup of an application package. A remote attacker can upload a specially crafted SharePoint application package and execute arbitrary code on the system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsMicrosoft SharePoint Server: 2016 - 2019
Microsoft SharePoint Server: 2013
External linkshttp://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16952
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.
7) Input validation error
EUVDB-ID: #VU47571
Risk: High
CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-16951
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to the Microsoft SharePoint fails to check the source markup of an application package. A remote attacker can upload a specially crafted SharePoint application package and execute arbitrary code on the system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsMicrosoft SharePoint Server: 2016 - 2019
Microsoft SharePoint Server: 2013
External linkshttp://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16951
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.
8) Out-of-bounds read
EUVDB-ID: #VU47570
Risk: Low
CVSSv3.1: 4.4 [CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-16950
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: No
DescriptionThe vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition when handling objects in memory within Microsoft SharePoint Server. A local user can create a specially crafted application and gain access to memory contents of an elevated process.
MitigationInstall update from vendor's website.
Vulnerable software versionsMicrosoft SharePoint Server: 2019
External linkshttp://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16950
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
