Security News
A business email compromise scheme targeting CEOs and CFOs using Microsoft Office 365 combines phishing with a man-in-the-middle attack to bypass multi-factor authentication. These attacks take advantage of a Microsoft 365 design flaw that allows miscreants to compromise accounts with MFA enabled and achieve persistence in victims' systems by adding a new, compromised, authentication method allowing them to come back at any time.
Active adversaries are increasingly exploiting stolen session cookies to bypass multi-factor authentication and gain access to corporate resources, according to Sophos. "Over the past year, we've seen attackers increasingly turn to cookie theft to work around the growing adoption of MFA. Attackers are turning to new and improved versions of information stealing malware like Raccoon Stealer to simplify the process of obtaining authentication cookies, also known as access tokens," said Sean Gallagher, principal threat researcher, Sophos.
In a sign that malicious actors continue to find ways to work around Google Play Store security protections, researchers have spotted a previously undocumented Android dropper trojan that's currently in development. Dubbed BugDrop by the Dutch security firm, the dropper app is explicitly designed to defeat new features introduced in the upcoming version of Android that aim to make it difficult for malware to request Accessibility Services privileges from victims.
A security feature bypass vulnerability has been uncovered in three signed third-party Unified Extensible Firmware Interface boot loaders that allow bypass of the UEFI Secure Boot feature. "These vulnerabilities can be exploited by mounting the EFI System Partition and replacing the existing bootloader with the vulnerable one, or modifying a UEFI variable to load the vulnerable loader instead of the existing one," hardware security firm Eclypsium said in a report shared with The Hacker News.
Some signed third-party bootloaders for the Unified Extensible Firmware Interface could allow attackers to execute unauthorized code in an early stage of the boot process, before the operating system loads. Eclypsium security researchers Mickey Shkatov and Jesse Michael discovered vulnerabilities affecting UEFI bootloaders from third-party vendors that could be exploited to bypass the Secure Boot feature on Windows machines.
An authentication bypass Zimbra security vulnerability is actively exploited to compromise Zimbra Collaboration Suite email servers worldwide. Zimbra is an email and collaboration platform used by more than 200,000 businesses from over 140 countries, including over 1,000 government and financial organizations.
Proof-of-concept exploit code is now publicly available online for a critical authentication bypass security flaw in multiple VMware products that enables attackers to gain admin privileges.A week ago, VMware released updates to address the vulnerability affecting VMware Workspace ONE Access, Identity Manager, and vRealize Automation.
VMware and experts alike are urging users to patch multiple products affected by a critical authentication bypass vulnerability that can allow an attacker to gain administrative access to a system as well as exploit other flaws. "Given the prevalence of attacks targeting VMware vulnerabilities and a forthcoming proof-of-concept, organizations need to make patching CVE-2022-31656 a priority," Claire Tillis, senior research engineer with Tenable's Security Response Team, said in an email to Threatpost.
VMware has fixed a critical authentication bypass vulnerability that hits 9.8 out of 10 on the CVSS severity scale and is present in multiple products. The critical vulnerability is similar to, or perhaps even a variant or patch bypass of, an earlier critical authentication bypass vulnerability that also rated 9.8 in severity and VMware fixed back in May. Shortly after that update was issued, CISA demanded US government agencies pull the plug on affected VMware products if patches can't be applied.
VMware has warned admins today to patch a critical authentication bypass security flaw affecting local domain users in multiple products and enabling unauthenticated attackers to gain admin privileges. "This critical vulnerability should be patched or mitigated immediately per the instructions in VMSA," VMware warned.