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Academics from Vrije University in Amsterdam and ETH Zurich have published a new research paper describing yet another variation of the Rowhammer attack. Dubbed  SMASH  (Synchronized MAny-Sided Hammering), the technique can be used to successfully trigger the attack from JavaScript on modern DDR4 RAM cards, notwithstanding extensive mitigations that have been put in place by manufacturers over the last seven years. "Despite their in-DRAM Target Row Refresh (TRR) mitigations, some of the most recent DDR4 modules are still vulnerable to many-sided Rowhammer bit flips," the researchers said.  "SMASH exploits high-level knowledge of cache replacement policies to generate optimal access patterns for eviction-based many-sided Rowhammer. To bypass the in-DRAM TRR mitigations, SMASH carefully schedules cache hits and misses to successfully trigger synchronized many-sided Rowhammer bit flips." By synchronizing memory requests with DRAM refresh commands, the researchers...

One of the biggest consequences of the rapidly evolving cybersecurity threat landscape is that defenses must constantly build bigger systems to defend themselves.  This leads to both more complex systems and often less communication between them. More importantly, it can lead companies to invest in disparate “best in class” components instead of finding the best fit for their needs. The constant arms race means that companies often get bigger, more powerful tools that can’t handle the nuanced threats they face. For instance, in a car race, it’s not often the fastest, most powerful car that wins, but the one that is more balanced, lighter, and more able to turn and react when needed. In a new live webinar, Cynet Chief Strategist Chris Roberts breaks down why the philosophy of “simpler is better” is just what cybersecurity needs ( register here ). The webinar will focus on how quickly cybersecurity stacks are growing and how this is not always a good thing. Companies are too foc...

Google on Tuesday released a new version of Chrome web-browsing software for Windows, Mac, and Linux with patches for two newly discovered security vulnerabilities for both of which it says exploits exist in the wild, allowing attackers to engage in active exploitation. One of the two flaws concerns an insufficient validation of untrusted input in its V8 JavaScript rendering engine (CVE-2021-21220), which was demonstrated by Dataflow Security's Bruno Keith and Niklas Baumstark at the  Pwn2Own 2021  hacking contest last week. While Google moved to fix the flaw quickly, security researcher Rajvardhan Agarwal published a  working exploit  over the weekend by reverse-engineering the patch that the Chromium team pushed to the open-source component, a factor that may have played a crucial role in the release. UPDATE:   Agarwal, in an email to The Hacker News, confirmed that there's one more vulnerability affecting Chromium-based browsers that has been patched in...

In its April slate of patches, Microsoft rolled out fixes for a total of  114 security flaws , including an actively exploited zero-day and four remote code execution bugs in Exchange Server. Of the  114 flaws , 19 are rated as Critical, 88 are rated Important, and one is rated Moderate in severity. Chief among them is  CVE-2021-28310 , a privilege escalation vulnerability in Win32k that's said to be under active exploitation, allowing attackers to elevate privileges by running malicious code on a target system.  Cybersecurity firm Kaspersky, which discovered and reported the flaw to Microsoft in February, linked the zero-day exploit to a threat actor named Bitter APT, which was found exploiting a similar flaw ( CVE-2021-1732 ) in attacks late last year. "It is an escalation of privilege (EoP) exploit that is likely used together with other browser exploits to escape sandboxes or get system privileges for further access," Kaspersky researcher Boris Larin  ...

Security researchers have uncovered nine vulnerabilities affecting four TCP/IP stacks impacting more than 100 million consumer and enterprise devices that could be exploited by an attacker to take control of a vulnerable system. Dubbed " NAME:WRECK " by Forescout and JSOF, the flaws are the latest in series of studies undertaken as part of an initiative called Project Memoria to study the security of widely-used TCP/IP stacks that are incorporated by various vendors in their firmware to offer internet and network connectivity features. "These vulnerabilities relate to Domain Name System (DNS) implementations, causing either Denial of Service (DoS) or Remote Code Execution (RCE), allowing attackers to take target devices offline or to take control over them," the researchers said. The name comes from the fact that parsing of domain names can break (i.e., "wreck") DNS implementations in TCP/IP stacks, adding to a recent uptick in vulnerabilities such as ...