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It turns out that the root cause behind several previously disclosed speculative execution attacks against modern processors, such as Meltdown and Foreshadow , was misattributed to 'prefetching effect,' resulting in hardware vendors releasing incomplete mitigations and countermeasures. Sharing its findings with The Hacker News, a group of academics from the Graz University of Technology and CISPA Helmholtz Center for Information Security finally revealed the exact reason behind why the kernel addresses are cached in the first place, as well as presented several new attacks that exploit the previously unidentified underlying issue, allowing attackers to sniff out sensitive data. The new research explains microarchitectural attacks were actually caused by speculative dereferencing of user-space registers in the kernel, which not just impacts the most recent Intel CPUs with the latest hardware mitigations, but also several modern processors from ARM, IBM, and AMD — previou...

A new research has identified four new variants of HTTP request smuggling attacks that work against various commercial off-the-shelf web servers and HTTP proxy servers. Amit Klein, VP of Security Research at SafeBreach who presented the findings today at the Black Hat security conference, said that the attacks highlight how web servers and HTTP proxy servers are still susceptible to HTTP request smuggling even after 15 years since they were first documented. What is HTTP Request Smuggling? HTTP request smuggling (or HTTP Desyncing) is a technique employed to interfere with the way a website processes sequences of HTTP requests that are received from one or more users. Vulnerabilities related to HTTP request smuggling typically arise when the front-end (a load balancer or proxy) and the back-end servers interpret the boundary of an HTTP request differently, thereby allowing a bad actor to send (or "smuggle") an ambiguous request that gets prepended to the next le...

Many companies today have developed a Cybersecurity Incident Response (IR) plan. It's a sound security practice to prepare a comprehensive IR plan to help the organization react to a sudden security incident in an orderly, rational manner. Otherwise, the organization will develop a plan while frantically responding to the incident, a recipe ripe for mistakes. Heavyweight boxer Mike Tyson once said, "Everybody has a plan until they get punched in the mouth." A significant cybersecurity incident is an equivalent punch in the mouth to the cybersecurity team and perhaps the entire organization. At least at first. Developing an Incident Response plan is undoubtedly smart, but it only gets the organization so far. Depending on the severity of the incident and the level of cybersecurity expertise within the breached organization, a cybersecurity incident often leads to panic and turmoil within the organization – plan or no plan. It's very unsettling to have system...

Apple earlier this year fixed a security vulnerability in iOS and macOS that could have potentially allowed an attacker to gain unauthorized access to a user's iCloud account. Uncovered in February by Thijs Alkemade , a security specialist at IT security firm Computest, the flaw resided in Apple's implementation of TouchID (or FaceID) biometric feature that authenticated users to log in to websites on Safari, specifically those that use Apple ID logins. After the issue was reported to Apple through their responsible disclosure program, the iPhone maker addressed the vulnerability in a server-side update . An Authentication Flaw The central premise of the flaw is as follows. When users try to sign in to a website that requires an Apple ID, a prompt is displayed to authenticate the login using Touch ID. Doing so skips the two-factor authentication step since it already leverages a combination of factors for identification, such as the device (something you have) and...

Intelligence agencies in the US have released information about a new variant of 12-year-old computer virus used by China's state-sponsored hackers targeting governments, corporations, and think tanks. Named " Taidoor, " the malware has done an 'excellent' job of compromising systems as early as 2008 , with the actors deploying it on victim networks for stealthy remote access. "[The] FBI has high confidence that Chinese government actors are using malware variants in conjunction with proxy servers to maintain a presence on victim networks and to further network exploitation," the US Cybersecurity and Infrastructure Security Agency (CISA), the Federal Bureau of Investigation (FBI), and the Department of Defense (DoD) said in a joint advisory . The US Cyber Command has also uploaded four samples of the Taidoor RAT on the public malware repository VirusTotal to let 50+ Antivirus companies check the virus's involvement in other unattributed cam...