Linphone | Breaking Cybersecurity News | The Hacker News

Multiple security vulnerabilities have been disclosed in softphone software from Linphone and MicroSIP that could be exploited by an unauthenticated remote adversary to crash the client and even extract sensitive information like password hashes by simply making a malicious call. The vulnerabilities, which were discovered by Moritz Abrell of German pen-testing firm SySS GmbH, have since been addressed by the respective manufacturers following responsible disclosure. Softphones are essentially software-based phones that mimic desk phones and allow for making telephone calls over the Internet without the need for using dedicated hardware. At the core of the issues are the SIP services offered by the clients to connect two peers to facilitate telephony services in IP-based mobile networks. SIP aka Session Initiation Protocol is a  signaling protocol  that's used to control interactive communication sessions, such as voice, video, chat and instant messaging, as well as games and v

Cybersecurity researchers on Tuesday disclosed details about a zero-click security vulnerability in the Linphone Session Initiation Protocol ( SIP ) stack that could be remotely exploited without any action from a victim to crash the SIP client and cause a denial-of-service (DoS) condition. Tracked as  CVE-2021-33056  (CVSS score: 7.5), the issue concerns a NULL pointer dereference vulnerability in the " belle-sip " component, a C-language library used to implement SIP transport, transaction, and dialog layers, with all versions prior to  4.5.20  affected by the flaw. The weakness was discovered and reported by industrial cybersecurity company Claroty. Linphone is an open-source and cross-platform SIP client with support for voice and video calls, end-to-end encrypted messaging, and audio conference calls, among others. SIP, on the other hand, is a signaling protocol used for initiating, maintaining, and terminating real-time multimedia communication sessions for voice, v

As a vCISO, you are responsible for your client's cybersecurity strategy and risk governance. This incorporates multiple disciplines, from research to execution to reporting. Recently, we published a comprehensive playbook for vCISOs, "Your First 100 Days as a vCISO – 5 Steps to Success" , which covers all the phases entailed in launching a successful vCISO engagement, along with recommended actions to take, and step-by-step examples.  Following the success of the playbook and the requests that have come in from the MSP/MSSP community, we decided to drill down into specific parts of vCISO reporting and provide more color and examples. In this article, we focus on how to create compelling narratives within a report, which has a significant impact on the overall MSP/MSSP value proposition.  This article brings the highlights of a recent guided workshop we held, covering what makes a successful report and how it can be used to enhance engagement with your cyber security clients.