#microsoft

A vulnerability was found in Microsoft O365 and classified as critical. This issue affects the Conditional Access Policy which leads to improper access controls. By default the policy is not verified for every request. The attack may be initiated remotely. Exploit details have been disclosed to the public. It is recommended to change the configuration settings. NOTE: Vendor claims that pre-requisites are very high, the feature works as intended, and that configuration settings might mitigate the issue.

Cybersecurity researchers have detailed the workings of a fully-featured malware loader dubbed PureCrypter that's being purchased by cyber criminals to deliver remote access trojans (RATs) and information stealers. "The loader is a .NET executable obfuscated with SmartAssembly and makes use of compression, encryption, and obfuscation to evade antivirus software products," Zscaler's Romain Dumont

**Why is this Rapid7 CVE included in the Security Update Guide?** The vulnerability assigned to this CVE was originally classified as a stability bug in Windows. Rapid7 discovered that this bug could be used to cause a denial of service condition on affected versions of Windows. Microsoft had provided an update to address this issue prior to being contacted about it by Rapid 7. Microsoft appreciates the strong partnership that we have with Rapid7. **Why are the May updates associated with the operating systems rows in the Security Updates table?** This vulnerability was addressed in the May 2022 security updates.

**According to the CVSS metric confidentiality is High (C:H). What confidential information can be disclosed?** Exploiting this vulnerability will allow an attacker to access resources that are protected by conditional access policies based solely on device compliance state. For more information, please refer to Scenarios for using Conditional Access with Microsoft Intune - Microsoft Intune | Microsoft Docs.

**According to the CVSS metric, privileges required is low (PR:L). What does that mean for this vulnerability?** The attacker must be authenticated and possess the permissions for page creation to be able to exploit this vulnerability.

**According to the CVSS metric, privileges required is low (PR:L). What does that mean for this vulnerability?** The attacker must be authenticated and possess the permissions for page creation to be able to exploit this vulnerability.

**According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?** Successful exploitation of this vulnerability requires an attacker to gather information specific to the environment of the targeted component.

**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 uninitialized memory.

**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 memory layout - the vulnerability allows an attacker to collect information that facilitates predicting addressing of the memory.

**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 device information like resource ids, sas tokens, user properties, and other sensitive information.