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Writeup for CVE-2023-39143: PaperCut WebDAV Vulnerability

Introduction Back in Aug. 2023 we released an advisory for CVE-2023-39143, a critical vulnerability that affects Windows installs of the PaperCut NG/MF print management software. Attackers can exploit this vulnerability to download and delete arbitrary files, and in certain common configurations upload files, leading to remote code execution. This vulnerability was patched in PaperCut version 22.1.3 in July 2023. This...
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Cisco IOS XE CVE-2023-20198: Deep Dive and POC

Introduction This post is a follow up to https://www.horizon3.ai/cisco-ios-xe-cve-2023-20198-theory-crafting/. Previously, we explored the patch for CVE-2023-20273 and CVE-2023-20198 affecting Cisco IOS XE and identified some likely vectors an attacker might have used to exploit these vulnerabilities. Now, thanks to SECUINFRA FALCON TEAM’s honeypot, we have further insight into these vulnerabilities. POC See below for an example request that bypasses authentication...
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Cisco IOS XE CVE-2023-20198 and CVE-2023-20273: WebUI Internals, Patch Diffs, and Theory Crafting

Introduction There has been a lot of news around the recent Cisco IOS XE vulnerabilities CVE-2023-20198 and CVE-2023-2073. Information about this vulnerability was first published by Cisco on October 16th, 2023, and since then we have seen evidence of mass exploitation and implantation. In this post we share our technical insights so far into these vulnerabilities. Cisco IOS XE Architecture...
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