Background: Recently I’ve seen a decent number of privilege escalations occurring on Windows due to permission issues and using symlinks. The work from Ryan Hanson from Atredis on the Cylance privilege escalation and Windows Standard Collector privilege escalation really inspired me to research more into this issue and potentially find some myself. After several weeks of researching the usage of symlinks, […]
CVE Numbers: CVE-2018-0437 – Cisco Umbrella ERC releases prior to 2.1.118 and Cisco Umbrella CVE-2018-0438 – Cisco Umbrella ERC releases prior to 2.1.127 Versions Tested: Umbrella Roaming Client 2.0.168 Security Advisories: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180905-umbrella-priv https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180905-umbrella-file-read Binary Planting: The Umbrella Roaming Client from Cisco OpenDNS includes a service named Umbrella_RC which is executed as SYSTEM on startup. This service consumes several files within […]
Security awareness training is broken. Read the news any day of the week and you can find articles talking about breaches, ransomware attacks, and countless records stolen resulting in identity theft victims. Our users are continuing to click suspicious links, open attachments they weren’t expecting, and falling for the call to action. Attackers know that […]
Exploits for network devices including routers, switches, and firewalls have been around for as long as networking has been a thing. It seems like every week a researcher discloses a new vulnerability or publishes proof of concept (PoC) code online for these types of devices, and that is exactly what is happening in this article. […]
Introduction Finding Linux servers heavily reliant on Sudo rules for daily management tasks is a common occurrence. While not necessarily bad, Sudo rules can quickly become security’s worst nightmare. Before discussing the security implications, let’s first discuss what Sudo is. Defining Sudo What is Sudo? Sudo, which stands for “superuser do!,” is a program that […]
In the age of the breach, it’s a safe assumption that almost every public account’s credentials have been exposed at some point. “Have I Been Pwned” (HIBP), is a database that contains usernames and other information about any compromise they come across. While available for individuals to search against, certain protections have been put in place […]