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Widespread routers' DNS hijacking malware that recently found targeting Android devices has now been upgraded its capabilities to target iOS devices as well as desktop users. Dubbed Roaming Mantis , the malware was initially found hijacking Internet routers last month to distribute Android banking malware designed to steal users' login credentials and the secret code for two-factor authentication. According to security researchers at Kaspersky Lab s, the criminal group behind the Roaming Mantis campaign has broadened their targets by adding phishing attacks for iOS devices, and cryptocurrency mining script for PC users. Moreover, while the initial attacks were designed to target users from South East Asia–including South Korea, China Bangladesh, and Japan–the new campaign now support 27 languages to expand its operations to infect people across Europe and the Middle East. How the Roaming Mantis Malware Works Similar to the previous version, the new Roaming Mantis...

Last week, we reported about the first network-based remote Rowhammer attack, dubbed Throwhammer , which involves the exploitation a known vulnerability in DRAM through network cards using remote direct memory access (RDMA) channels. However, a separate team of security researchers has now demonstrated a second network-based remote Rowhammer technique that can be used to attack systems using uncached memory or flush instruction while processing the network requests. The research was carried out by researchers who discovered Meltdown and Spectre CPU vulnerabilities, which is independent of the Amsterdam researchers who presented a series of Rowhammer attacks, including Throwhammer published last week. If you are unaware, Rowhammer is a critical issue with recent generation dynamic random access memory (DRAM) chips in which repeatedly accessing a row of memory can cause "bit flipping" in an adjacent row, allowing attackers to change the contents of the memory. The...

For the second time in less than a week, users of the popular end-to-end encrypted Signal messaging app have to update their desktop applications once again to patch another severe code injection vulnerability. Discovered Monday by the same team of security researchers, the newly discovered vulnerability poses the same threat as the previous one, allowing remote attackers to inject malicious code on the recipients' Signal desktop app just by sending them a message—without requiring any user interaction. To understand more about the first code injection vulnerability ( CVE-2018-10994 ), you can read our previous article covering how researchers find the Signal flaw and how it works. The only difference between the two is that the previous flaw resides in the function that handles links shared in the chat, whereas the new vulnerability (CVE-2018-11101) exists in a different function that handles the validation of quoted messages, i.e., quoting a previous message in a reply...

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A Google security researcher has discovered a critical remote command injection vulnerability in the DHCP client implementation of Red Hat Linux and its derivatives like Fedora operating system. The vulnerability, tracked as CVE-2018-1111 , could allow attackers to execute arbitrary commands with root privileges on targeted systems. Whenever your system joins a network, it's the DHCP client application which allows your system to automatically receive network configuration parameters, such as an IP address and DNS servers, from the DHCP (Dynamic Host Control Protocol) server. The vulnerability resides in the NetworkManager integration script included in the DHCP client packages which is configured to obtain network configuration using the DHCP protocol. Felix Wilhelm from the Google security team found that attackers with a malicious DHCP server, or connected to the same network as the victim, can exploit this flaw by spoofing DHCP responses, eventually allowing them to run...

After the revelation of the eFail attack details, it's time to reveal how the recently reported code injection vulnerability in the popular end-to-end encrypted Signal messaging app works. As we reported last weekend, Signal has patched its messaging app for Windows and Linux that suffered a code injection vulnerability discovered and reported by a team of white-hat hackers from Argentina. The vulnerability could have been exploited by remote attackers to inject a malicious payload inside the Signal desktop app running on the recipients' system just by sending them a specially crafted link—without requiring any user interaction. According to a blog post published today, the vulnerability was accidentally discovered while researchers–Iván Ariel Barrera Oro, Alfredo Ortega and Juliano Rizzo–were chatting on Signal messenger and one of them shared a link of a vulnerable site with an XSS payload in its URL. However, the XSS payload unexpectedly got executed on the Sig...