Windows 10 Crypto API Spoofing
Microsoft has released a new security patch for a vulnerability that could affect millions of Windows 10 Users world wide. The decades old CryptoAPI tool validates and signs packages/software which could be utilized by hackers/developers to sign and execute illegitimate software thus would allow users to run anything without user’s nor Antivirus/Internet Security software’s notice.
Microsoft mentioned that the vulnerability could also allow hackers to change or modify encrypted communications.
It’s important to notice that CryptoAPI is a legacy API that’s being replace by a new CNG (Cryptography Next Generation API) which also supports CryptoAPI.
CryptoAPI Key Storage Architecture
Windows 2008 R2, Windows 7 RDP
A day ago Microsoft released two very important security patches on May 14, 2019. One of these patches has been detected in the RDP service (CVE-2019-0708) which affects Windows 7 and Windows 2008 R2. According to MS’s Article a remote code execution vulnerability exists in Remote Desktop Services – formerly known as Terminal Services – when an unauthenticated attacker connects to the target system using RDP and sends specially crafted requests. This vulnerability is pre-authentication and requires no user interaction. An attacker who successfully exploited this vulnerability could execute arbitrary code on the target system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
Windows 2008R2, 2012R2, 2016 and 2019 DHCP
The other one is in the DHCP service (CVE-2019-0725), and both exploitations are very critical. When we look at CVE-2019-0708, which is related to the RDP service, we see that attackers are able to run code on systems by sending specially produced packages without any user interaction and authentication and manage to install malware like Ransomware or other execution files.
Microsoft, NSA, Other Security Researchers