Attack Blogs

Introduction In December 2022, we competed at our first pwn2own. We were able to successfully exploit the Lexmark MC3224i using a command injection 0-day. This post will detail the process we used to discover, weaponize, and have some fun with this vulnerability. You can find our POC here. Printer Acquisition It was rather difficult to…

Summary CVE-2023-39143 is a critical vulnerability we disclosed to PaperCut that affects the widely used PaperCut NG/MF print management software. It affects PaperCut NG/MF running on Windows, prior to version 22.1.3. If you are a user of PaperCut on Windows, and have it exposed to the Internet, we recommend you check out the July 2023…

On May 31, 2023, Progress released a security advisory for their MOVEit Transfer application which detailed a SQL injection leading to remote code execution and urged customers to update to the latest version. The vulnerability, CVE-2023-34362, at the time of release was believed to have been exploited in-the-wild as a 0-day dating back at least…

Apache Superset is an open source data visualization and exploration tool. It has over 50K stars on GitHub, and there are more than 3000 instances of it exposed to the Internet. In our research, we found that a substantial portion of these servers - at least 2000 (two-thirds of all servers) - are running with…

Overview On 8 March 2023, PaperCut released new versions for their enterprise print management software, which included patches for two vulnerabilities: CVE-2023-27350 and CVE-2023-27351. The PaperCut security advisory details CVE-2023-27350 as a vulnerability that may allow an attacker to achieve remote code execution to compromise the PaperCut application server. PaperCut also details in this advisory…

Introduction Veeam has recently released an advisory for CVE-2023-27532 for Veeam Backup and Replication which allows an unauthenticated user with access to the Veeam backup service (TCP 9401 by default) to request cleartext credentials. Others, including Huntress, Y4er, and CODE WHITE , have provided insight into this vulnerability. In this post, we hope to offer…

On September 13, 2022, a new Kerberos vulnerability was published on the Microsoft Security Response Center's security site.  It's labeled as a Windows Kerberos Elevation of Privilege vulnerability and given the CVE ID CVE-2022-33679.  The MSRC page acknowledges James Forshaw of Google Project Zero for the disclosure and James published a detailed technical write-up of…

Introduction On Thursday, 16 February 2023, Fortinet released a PSIRT that details CVE-2022-39952, a critical vulnerability affecting its FortiNAC product. This vulnerability, discovered by Gwendal Guégniaud of Fortinet, allows an unauthenticated attacker to write arbitrary files on the system and as a result obtain remote code execution in the context of the root user. Extracting…

Introduction The recent VMware VMSA describes four new CVEs affecting VMware vRealize Log Insight, reported by ZDI. Three of these CVEs can be combined to give an attacker remote code execution as root. This vulnerability is exploitable in the default configuration for VMware vRealize Log Insight. We have successfully reproduced this exploit and would like…

Introduction The recent VMware VMSA describes four new CVEs affecting VMware vRealize Log Insight. Three of these CVEs can be combined to give an attacker remote code execution as root. This vulnerability is exploitable in the default configuration for VMware vRealize Log Insight. CVE-2022-31704: VMware vRealize Log Insight broken access control Vulnerability CVE-2022-31711: VMware vRealize…