#Security Vulnerability

**According to the CVSS, the Attack Complexity is High. What does that mean for this particular vulnerability?** The attack requires that multiple users try to use the gateway at the same time.

**According to the CVSS, User Interaction is Required. What interaction would the user have to do?** This vulnerability requires that a user with an affected version of Windows access a malicious server. An attacker would have to host a specially crafted server share or website. An attacker would have no way to force users to visit this specially crafted server share or website, but would have to convince them to visit the server share or website, typically by way of an enticement in an email or chat message.

References Identification First version of the Microsoft Malware Protection Engine with this vulnerability addressed Version 1.1.19100.5 See Manage Updates Baselines Microsoft Defender Antivirus for more information. **Microsoft Defender is disabled in my environment, why are vulnerability scanners showing that I am vulnerable to this issue?** Vulnerability scanners are looking for specific binaries and version numbers on devices. Microsoft Defender files are still on disk even when disabled. Systems that have disabled Microsoft Defender are not in an exploitable state. **Why is no action required to install this update?** In response to a constantly changing threat landscape, Microsoft frequently updates malware definitions and the Microsoft Malware Protection Engine. In order to be effective in helping protect against new and prevalent threats, antimalware software must be kept up to date with these updates in a timely manner. For enterprise deployments as well as end users,...

**What type of information could be disclosed by this vulnerability?** The type of information that could be disclosed if an attacker successfully exploited this vulnerability is file content.

**What is the nature of the spoofing?** An attacker could make a specially crafted network call to the target Skype for Business server, which could cause the parsing of an http request made to an arbitrary address. This could disclose IP addresses or port numbers or both to the attacker.

**What type of information could be disclosed by this vulnerability?** The type of information that could be disclosed if an attacker successfully exploited this vulnerability is the contents of Kernel memory. An attacker could read the contents of Kernel memory from a user mode process.

**What type of information could be disclosed by this vulnerability?** This vulnerability could disclose sensitive information in exception body, which might include user access tokens.

**How could an attacker exploit this vulnerability?** The attacker would need to trick or coerce a legitimate user into downloading and executing a specially crafted install file

**How could an attacker exploit this vulnerability?** An authenticated user could run a specially crafted trusted solution package to execute arbitrary SQL commands. From there the attacker could escalate and execute commands as db\_owner within their Dynamics 356 database.

**How could an attacker exploit the vulnerability?** To exploit this vulnerability, an attacker would need to trick a user into executing a specially crafted script which executes an RPC call to an RPC host. This could result in remote code execution on the server side with the same permissions as the RPC service.