DEVCORE research team found a 9-year-old WAN bug on RouterOS, the product of MikroTik. Combined with another bug of the Canon printer, DEVCORE becomes the first team ever to successfully complete an attack chain in the brand new SOHO Smashup category of Pwn2Own. And DEVCORE also won the title of Master of Pwn in Pwn2Own Toronto 2022.
We identified Pre-auth RCE vulnerabilities in Canon printers (CVE-2023-0853, CVE-2023-0854) and also discovered Pre-auth RCE flaws in HP printers, which led to our achievement of the Master of Pwn title at Pwn2Own Toronto 2022. This article will detail the vulnerabilities and exploitation methods for both Canon and HP printers.
In 2021, we found Pre-auth RCE vulnerabilities(CVE-2022-24673 and CVE-2022-3942) in Canon and HP printers, and vulnerability(CVE-2021-44734) in Lexmark. We used these vulnerabilities to exploit Canon ImageCLASS MF644Cdw, HP Color LaserJet Pro MFP M283fdw and Lexmark MC3224i in Pwn2Own Austin 2021. Following we will describe the details of the Canon and HP vulnerabilities and exploitation.
With the prior knowledge in mind, I come up with a simple idea. It’s common to see multiple Exchange Servers in corporate networks for high availability and site resilience. Can we relay the NTLM authentication among Exchange Servers?
We have successfully found a serious vulnerability in the NAS, and successfully wrote a proof-of-concept, which proved that it can be exploited on many NAS such as Synology, QNAP and Asustor.
ProxyShell: The exploit chain we demonstrated at Pwn2Own 2021 to take over Exchange and earn $200,000 bounty
ProxyLogon! The most severe and impactful vulnerability in the Exchange Server history ever.
