New Zoom Hack Lets Hackers Compromise Windows and Its Login Password
Zoom has been there for nine years, but the immediate requirement of an easy-to-use video conferencing app during the coronavirus pandemic overnight made it one of the most favorite communication tool for millions of people around the globe.
Warning — Two Unpatched Critical 0-Day RCE Flaws Affect All Windows Versions
Microsoft today issued a new security advisory warning billions of Windows users of two new critical, unpatched zero-day vulnerabilities that could let hackers remotely take complete control over targeted computers.
New Android Cookie-Stealing Malware Found Hijacking Facebook Accounts
A new simple but dangerous strain of Android malware has been found in the wild that steals users' authentication cookies from the web browsing and other apps, including Chrome and Facebook, installed on the compromised devices.
Warning — Unpatched Critical 'Wormable' Windows SMBv3 Flaw Disclosed
Shortly after releasing its monthly batch of security updates, Microsoft late yesterday separately issued an advisory warning billions of its Windows users of a new critical, unpatched, and wormable vulnerability affecting Server Message Block 3.0 (SMBv3) network communication protocol.
Microsoft Issues March 2020 Updates to Patch 115 Security Flaws
Microsoft today released security updates to fix a total of 115 new security vulnerabilities in various versions of its Windows operating system and related software—making March 2020 edition the biggest ever Patch Tuesday in the company's history.
Critical PPP Daemon Flaw Opens Most Linux Systems to Remote Hackers
The US-CERT today issued advisory warning users of a new dangerous 17-year-old remote code execution vulnerability affecting the PPP daemon (pppd) software that comes installed on almost all Linux based operating systems, as well as powers the firmware of many other networking devices.
GhostCat: New High-Risk Vulnerability Affects Servers Running Apache Tomcat
If your web server is running on Apache Tomcat, you should immediately install the latest available version of the server application to prevent hackers from taking unauthorized control over it.
New Wi-Fi Encryption Vulnerability Affects Over A Billion Devices
Cyber security researchers today uncovered a new high-severity hardware vulnerability residing in the widely-used Wi-Fi chips manufactured by Broadcom and Cypress—apparently powering over a billion devices, including smartphones, tablets, laptops, routers, and IoT gadgets.
New OpenSMTPD RCE Flaw Affects Linux and OpenBSD Email Servers
OpenSMTPD has been found vulnerable to yet another critical vulnerability that could allow remote attackers to take complete control over email servers running BSD or Linux operating systems.
Emotet Malware Now Hacks Nearby Wi-Fi Networks to Infect New Victims
Emotet, the notorious trojan behind a number of botnet-driven spam campaigns and ransomware attacks, has found a new attack vector: using already infected devices to identify new victims that are connected to nearby Wi-Fi networks.
Update Windows 10 Immediately to Patch a Flaw Discovered by the NSA
After Adobe today releases its first Patch Tuesday updates for 2020, Microsoft has now also published its January security advisories warning billions of users of 49 new vulnerabilities in its various products.
What's so special about the latest Patch Tuesday is that one of the updates fixes a serious flaw in the core cryptographic component of widely used Windows 10, Server 2016 and 2019 editions that was discovered and reported to the company by the National Security Agency (NSA) of the United States.
What's more interesting is that this is the first security flaw in Windows OS that the NSA reported responsibly to Microsoft, unlike the Eternalblue SMB flaw that the agency kept secret for at least five years and then was leaked to the public by a mysterious group, which caused WannaCry menace in 2017.
CVE-2020-0601: Windows CryptoAPI Spoofing Vulnerability
According to an advisory released by Microsoft, the flaw, dubbed 'NSACrypt' and tracked as CVE-2020-0601, resides in the Crypt32.dll module that contains various 'Certificate and Cryptographic Messaging functions' used by the Windows Crypto API for handling encryption and decryption of data.
The issue resides in the way Crypt32.dll module validates Elliptic Curve Cryptography (ECC) certificates that is currently the industry standard for public-key cryptography and used in the majority of SSL/TLS certificates.
In a press release published by the NSA, the agency explains "the certificate validation vulnerability allows an attacker to undermine how Windows verifies cryptographic trust and can enable remote code execution."
Exploitation of the vulnerability allows attackers to abuse validation of trust between:
- HTTPS connections
- Signed files and emails
- Signed executable code launched as user-mode processes
Though technical details of the flaw are not yet available to the public, Microsoft confirms the flaw, which if exploited successfully, could allow attackers to spoof digital signatures on software, tricking the operating system into installing malicious software while impersonating the identity of any legitimate software—without users' knowledge.
"A spoofing vulnerability exists in the way Windows CryptoAPI (Crypt32.dll) validates Elliptic Curve Cryptography (ECC) certificates," the microsoft advisory says.
"An attacker could exploit the vulnerability by using a spoofed code-signing certificate to sign a malicious executable, making it appear the file was from a trusted, legitimate source. The user would have no way of knowing the file was malicious because the digital signature would appear to be from a trusted provider."
Besides this, the flaw in CryptoAPI could also make it easy for remote man-in-the-middle attackers to impersonate websites or decrypt confidential information on user connections to the affected software.
"This vulnerability is classed Important and we have not seen it used in active attacks," the microsoft said in a separate blog post.
"This vulnerability is one example of our partnership with the security research community where a vulnerability was privately disclosed and an update released to ensure customers were not put at risk."
"The consequences of not patching the vulnerability are severe and widespread. Remote exploitation tools will likely be made quickly and widely available," the NSA said.
Besides Windows CryptoAPI spoofing vulnerability that has been rated 'important' in severity, Microsoft has also patched 48 other vulnerabilities, 8 of which are critical and rest all 40 are important.
There is no mitigating or workaround available for this vulnerability, so you're highly recommended to install the latest software updates by heading on to your Windows Settings → Update & Security → Windows Update → clicking 'Check for updates on your PC.'
Other Critical RCE Flaws in Windows
Two of the critical issues affect Windows Remote Desktop Gateway (RD Gateway), tracked as CVE-2020-0609 and CVE-2020-0610, that can be exploited by unauthenticated attackers to execute malicious code on targeted systems just by sending a specially crafted request via RDP.
"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," the advisory says.
One critical issue in Remote Desktop Client, tracked as CVE-2020-0611, could lead to a reverse RDP attack where a malicious server can execute arbitrary code on the computer of the connecting client.ability
"To exploit this vulnerability, an attacker would need to have control of a server and then convince a user to connect to it," the advisory says.
"An attacker could also compromise a legitimate server, host malicious code on it, and wait for the user to connect."
Fortunately, none of the flaws addressed this month by Microsoft were publicly disclosed or found being exploited in the wild.