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OpenSIPS Security Audit Report is fully disclosed and out there

Published on Mar 17, 2023 in , , , , , , , ,

It’s almost a year since the OpenSIPS project published a minimized version of our security audit report from 2022. Now, the full version has been published, with all the information intact on how to reproduce the vulnerabilities and extra details in an 80+ page report. The OpenSIPS security audit report can be found here. What is the OpenSIPS security audit? OpenSIPS is a SIP server that often has a critical security function within an IP communications system.…

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SIPVicious PRO incremental update - and Gitlab CI/CD examples

Published on Mar 7, 2023 in , , , , ,

We just pushed out a new SIPVicious PRO update to our subscribing members! This version does not include any new major features. Instead, it fixes various bugs and brings missing but necessary features to various SIPVicious PRO tools. We have the following highlights in this update: Documentation now includes realistic Gitlab CI/CD examples The RTP fuzzer in the experimental version now supports SRTP Support for new SIP DoS flood request methods The RTP inject tool can now specify the RTP’s SSRC and payload ID The SIP password cracking tool now supports closing the connection upon each attempt The SIP ping utility supports INVITE For the boring details, including a list of bug fixes, do read the release notes for v6.…

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SIPVicious PRO experimental now supports STIR/SHAKEN and 5 new tools

Published on Jul 6, 2022 in , , ,

We just made two builds available to our SIPVicious PRO members. One is called the stable build, while the other is the experimental build. The v6.0.0-beta.5 stable build includes a large number of fixes, much better (or sane) defaults and full coverage of SRTP throughout the toolset. The experimental version is where the excitement is. Our members now have access to 5 new tools that we find useful in our work:…

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Exploiting CVE-2022-0778, a bug in OpenSSL vis-à-vis WebRTC platforms

Published on Apr 8, 2022 in , , , , , ,

Executive summary (TL;DR) Exploiting CVE-2022-0778 in a WebRTC context requires that you get a few things right first. But once that is sorted, DoS (in RTC) is the new RCE! How I got social engineered into looking at CVE-2022-0778 A few days ago, Philipp Hancke, self-proclaimed purveyor of the dark side of WebRTC, messaged me privately with a very simple question: “are you offering a DTLS scanner by chance?” He explained how in the context of WebRTC it would be a bit difficult since you need to get signaling right, ICE (that dance with STUN and other funny things) and finally, you get to do your DTLS scans.…

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Killing bugs … one vulnerability report at a time

Published on Oct 29, 2021 in , , , ,

Executive summary (TL;DR) We tell the story behind the latest FreeSWITCH advisories and how it all came together one sleepless night in April 2021 so that we ended up with 4 vulnerabilities that needed reporting. And then, one more vulnerability found due to a bug in our own software, SIPVicious PRO. We explain how these flaws were discovered, reported, fixed and what we ultimately learned through this process. What is this about?…

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One presentation at ClueCon and five security advisories for FreeSWITCH

Published on Oct 25, 2021 in , , , ,

The FreeSWITCH team has just published version v1.10.7 which fixes a number of security issues that we reported. If you use FreeSWITCH, please do upgrade to get these security updates. To learn about the background work that went into getting these security bugs squashed, follow Sandro’s talk called Killing bugs … one vulnerability report at a time. This will be presented at at ClueCon on Thursday, October 28th. Here are the titles of each advisory and a very short summary:…

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DEMO - An overview of the VoIP and RTC offensive security toolset, SIPVicious PRO

Published on May 25, 2021 in , , , , , ,

We pushed out a video that introduces the basics of SIPVicious PRO by demonstrating some of the attack tools and showing the building blocks for automating security testing of VoIP and WebRTC applications and infrastructure. What follows is a transcript of the video. Introduction Hello, I’m Sandro Gauci from Enable Security. In this video, I’d like to show you what we have been working on, SIPVicious PRO! Let’s start by introducing the tools.…

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SIPVicious PRO 6.0.0-beta.4 getting close to take-off!

Published on May 20, 2021 in , , ,

This one’s a bit of a boring update for SIPVicious PRO. That’s because we’re getting to a stable place where flag names and values do not change too often. Which means, we’re getting out of beta rather soon! However, it is still a major update because we made a significant number of internal changes. For example, we standardized a number of flags to be the same across all tools. We discovered that we can minimize each tool’s flagset by making use of config flags such as --auth-config that allows you to configure behaviours specific to how SIPVicious handles authentication (e.…

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TADSummit Asia 2021 talk about SIPVicious Pro and the Demo Server

Published on May 18, 2021 in , , , , , , , ,

TADSummit is a great event where people from different backgrounds that are somehow involved in communications, contribute in various ways. I, personally, always look forward to see what’s coming up in the next TADSummit event. At the moment, TADSummit Asia presentations are currently being released on a daily basis on the main site. And last week, the presentation that I prepared was published! In the previous TADSummit, I had presented about why we need to bring an offensive approach to RTC security.…

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Bug discovery diaries: Abusing VoIPmonitor for Remote Code Execution

Published on Mar 16, 2021 in , , , , , ,

Executive summary (TL;DR) We fuzzed VoIPmonitor by using SIPVicious PRO and got a crash in the software’s live sniffer feature when it is switched on. We identified the cause of the crash by looking at the source code, which was a classic buffer overflow. Then we realized that was fully exploitable since the binaries distributed do not have any memory corruption protection. So we wrote exploit code using ROP gadgets to get remote code execution by just sending a SIP packet.…

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