CVE-2023-35389

FAQ

According to the CVSS metric, a successful exploitation could lead to a scope change (S:C). What does this mean for this vulnerability?

A user could be tricked into entering credentials or responding to a pop up after opening a specially crafted file or clicking on a link, typically by way of an enticement in an email or URL.

According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?

A user would have to open a maliciously crafted email sent to Dynamics 365 Customer Engagement.

According to the CVSS metrics, successful exploitation of this vulnerability could lead to minor loss of confidentiality (C:L), integrity (I:L) and availability (A:L). What does that mean for this vulnerability?

While we cannot rule out the impact to Confidentiality, Integrity, and Availability, the ability to exploit this vulnerability by itself is limited. An attacker can force a bad response to be cached into a regular URL by having multiple occurrences of the same variable in the query string. The impact depends on the business logic of the user application.

According to the CVSS metric, the attack vector is network (AV:N). What is the target used in the context of the remote code execution?

As an authenticated user, the attacker could attempt to trigger malicious code in the context of the victim.

• In an email attack scenario, an attacker could exploit the vulnerability by sending the specially crafted file to the user and convincing the user to open the file.
• In a web-based attack scenario, an attacker could host a website (or leverage a compromised website that accepts or hosts user-provided content) containing a specially crafted file designed to exploit the vulnerability.

An attacker would have no way to force users to visit the website. Instead, an attacker would have to convince users to click a link, typically by way of an enticement in an email or instant message, and then convince them to open the specially crafted file.

According to the CVSS metric, the attack vector is network (AV:N), and privilege required is low (PR:L). What is the target used in the context of the remote code execution?

The attacker for this vulnerability could target the server accounts in an arbitrary or remote code execution. As an authenticated user, the attacker could attempt to trigger malicious code in the context of the server's account through a network call.

The privilege requirement is low because the attacker needs to be authenticated as a normal user.