Multiple vulnerabilities in Microsoft SharePoint Server

Published: 2018-01-09 21:26:14 | Updated: 2018-01-09 22:26:16
Severity High
Patch available YES
Number of vulnerabilities 4
CVE ID CVE-2018-0789
CVE-2018-0792
CVE-2018-0799
CVE-2018-0790
CVSSv3 4.7 [CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]
8.3 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
5.2 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]
5.2 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]
CWE ID CWE-79
CWE-119
Exploitation vector Network
Public exploit Not available
Vulnerable software Microsoft SharePoint Server
Vulnerable software versions Microsoft SharePoint Server 2016
Microsoft SharePoint Server 2013
Microsoft SharePoint Server 2010
Vendor URL Microsoft

Security Advisory

1) Cross-site scripting

Description

Vulnerability allows a remote authenticated attacker to perform XSS attacks.

The vulnerability is caused by an input validation error of a specially crafted web request to an affected SharePoint server. A remote attacker can trick the victim to follow a specially specially crafted link and execute arbitrary HTML and script code in victim's browser in security 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.

Remediation

Install update from vendor's website.

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0789

2) Memory corruption

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing Microsoft Word documents. A remote attacker can create a specially crafted Word document, trick the victim into opening it and execute arbitrary code on the target system with privileges of the current user.

Remediation

Install updates from vendor's website.

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0792

3) Cross-site scripting

Description

Vulnerability allows a remote attacker to perform XSS attacks.

The vulnerability exists in Microsoft Access due to improper validation of user-supplied input. A remote attacker can trick the victim to follow a specially specially crafted link and execute arbitrary HTML and script code in victim's browser in security 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.

Remediation

Install update from vendor's website.

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0789

4) Cross-site scripting

Description

Vulnerability allows a remote attacker to perform XSS attacks.

The vulnerability is caused by an input validation error of a specially crafted web request to an affected SharePoint server. A remote attacker can trick the victim to follow a specially specially crafted link and execute arbitrary HTML and script code in victim's browser in security 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.

Remediation

Install update from vendor's website.

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0790

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