| CVE |
Vendors |
Products |
Updated |
CVSS v3.1 |
| We have investigated reports of a spoofing vulnerability in AppX installer that affects Microsoft Windows. Microsoft is aware of attacks that attempt to exploit this vulnerability by using specially crafted packages that include the malware family known as Emotet/Trickbot/Bazaloader.
An attacker could craft a malicious attachment to be used in phishing campaigns. The attacker would then have to convince the user to open the specially crafted attachment. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
Please see the Security Updates table for the link to the updated app. Alternatively you can download and install the Installer using the links provided in the FAQ section.
Please see the Mitigations and Workaround sections for important information about steps you can take to protect your system from this vulnerability.
December 27 2023 Update:
In recent months, Microsoft Threat Intelligence has seen an increase in activity from threat actors leveraging social engineering and phishing techniques to target Windows OS users and utilizing the ms-appinstaller URI scheme.
To address this increase in activity, we have updated the App Installer to disable the ms-appinstaller protocol by default and recommend other potential mitigations. |
| Allocation of resources without limits or throttling in .NET allows an unauthorized attacker to deny service over a network. |
| Stack-based buffer overflow in .NET Framework allows an unauthorized attacker to deny service over a network. |
| Protection mechanism failure in .NET Framework allows an unauthorized attacker to execute code locally. |
| Allocation of resources without limits or throttling in .NET Framework allows an unauthorized attacker to deny service over a network. |
| Improper control of generation of code ('code injection') in .NET Framework allows an unauthorized attacker to elevate privileges locally. |
| Deserialization of untrusted data in .NET allows an unauthorized attacker to execute code locally. |
| Improper encoding or escaping of output in .NET allows an authorized attacker to perform spoofing over a network. |
| Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally. |
| Use of uninitialized resource in Dynamic Root of Trust for Measurement (DRTM) allows an authorized attacker to disclose information locally. |
| Integer underflow (wrap or wraparound) in Windows DHCP Client allows an unauthorized attacker to elevate privileges over a network. |
| Integer underflow (wrap or wraparound) in Windows NT OS Kernel allows an authorized attacker to elevate privileges locally. |
| Use of uninitialized resource in Microsoft Windows App Store allows an authorized attacker to disclose information locally. |
| Relative path traversal in DNS Server allows an authorized attacker to execute code over an adjacent network. |
| Stack-based buffer overflow in Active Directory Federation Services allows an unauthorized attacker to deny service over a network. |
| Loop with unreachable exit condition ('infinite loop') in Active Directory Federation Services (AD FS) allows an unauthorized attacker to deny service over a network. |
| Stack-based buffer overflow in Active Directory Federation Services (AD FS) allows an unauthorized attacker to deny service over a network. |
| Stack-based buffer overflow in Active Directory Federation Services allows an unauthorized attacker to deny service over a network. |
| Loop with unreachable exit condition ('infinite loop') in Active Directory Federation Services (AD FS) allows an unauthorized attacker to deny service over a network. |
| Stack-based buffer overflow in Active Directory Federation Services allows an unauthorized attacker to deny service over a network. |
