Microsoft Dynamics 365 8.2/9.0 cross site scripting

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Microsoft Dynamics 365 8.2/9.0. The impacted element is an unknown function. Performing a manipulation results in cross site scripting. This vulnerability is cataloged as CVE-2020-16871. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Microsoft Dynamics 365 8.2/9.0. This affects an unknown functionality. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. The summary by CVE is:

<p>A cross site scripting vulnerability exists when Microsoft Dynamics 365 (on-premises) does not properly sanitize a specially crafted web request to an affected Dynamics server. An authenticated attacker could exploit the vulnerability by sending a specially crafted request to an affected Dynamics server.</p> <p>The attacker who successfully exploited the vulnerability could then perform cross-site scripting attacks on affected systems and run script in the security context of the current authenticated user. These attacks could allow the attacker to read content that the attacker is not authorized to read, use the victim's identity to take actions within Dynamics Server on behalf of the user, such as change permissions and delete content, and inject malicious content in the browser of the user.</p> <p>The security update addresses the vulnerability by helping to ensure that Dynamics Server properly sanitizes web requests.</p>

The weakness was shared 09/08/2020 as confirmed security update guide (Website). It is possible to read the advisory at portal.msrc.microsoft.com. The vendor cooperated in the coordination of the public release. This vulnerability is uniquely identified as CVE-2020-16871. It is possible to initiate the attack remotely. The successful exploitation needs a authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK. The advisory points out:

A cross site scripting vulnerability exists when Microsoft Dynamics 365 (on-premises) does not properly sanitize a specially crafted web request to an affected Dynamics server. An authenticated attacker could exploit the vulnerability by sending a specially crafted request to an affected Dynamics server.

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The entries VDB-160962, VDB-160960, VDB-160958 and VDB-160957 are related to this item. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Enterprise Resource Planning Software

Vendor

• Microsoft

Name

• Dynamics 365

Version

• 8.2
• 9.0

License

• commercial

Website

• Vendor: https://www.microsoft.com/

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