In September, security researchers discovered the existence of CVE-2019-16928, a vulnerability involving the mail transfer agent Exim. Exim accounts for over 50% of publicly reachable mail servers on the internet. What makes the bug particularly noteworthy is that threat actors could exploit it to perform denial of service (DoS) or possibly even remote code execution attacks (RCE) — making it a serious concern for Exim customers who use vulnerable versions of the software.Read More
October’s Patch Tuesday is relatively modest, with Microsoft releasing a total of 59 patches. However, this shorter list still warrants attention. Nine of the 59 were still identified as Critical, while the remaining 50 were labeled Important. Most of the critical bulletins were for various Internet Explorer and Microsoft Edge vulnerabilities, with one covering a Remote Desktop Client vulnerability. The Important bulletins fixed several issues, including NTLM and Microsoft IIS server vulnerabilities.Read More
We looked into the security implications of the changing banking paradigm with PSD2 in place. Our research highlights the current and new risks that the financial industry will have to defend against, and predict how cybercriminals will abuse and attack Open Banking.Read More
Last June, I disclosed a use-after-free (UAF) vulnerability in Internet Explorer (IE) to Microsoft. It was rated as critical, designated as CVE-2019-1208, and then addressed in Microsoft’s September Patch Tuesday. I discovered this flaw through BinDiff (a binary code analysis tool) and wrote a proof of concept (PoC) showing how it can be fully and consistently exploited in Windows 10 RS5.
A more in-depth analysis of this vulnerability is in this technical brief. As mentioned, CVE-2019-1208 is a UAF vulnerability. This class of security flaws can corrupt valid data, crash a process, and, depending on when it is triggered, can enable an attacker to execute arbitrary or remote code. In the case of CVE-2019-1208, an attacker successfully exploiting this vulnerability could gain the same rights as the current user in the system. If the current user has administrative privileges, the attacker can hijack the affected system — from installing or uninstalling programs and viewing and modifying data to creating user accounts with full privileges.Read More
Microsoft’s September Patch Tuesday covered 80 CVEs, 17 of which were rated critical, and included patches for Azure DevOps Server, Chakra Scripting engine, and Microsoft SharePoint. Sixty-two were labeled as important and included patches for Microsoft Excel, Microsoft Edge, and Microsoft Exchange. Only one was rated as moderate.Read More