Taking over Milesight UR32L routers behind a VPN: 22 vulnerabilities and a full chain
Summary: Cisco Talos disclosed 22 security advisories covering 69 CVEs in the Milesight UR32L industrial cellular router and MilesightVPN, nine of which carry a CVSS score above 8, after Milesight did not respond appropriately during the 90-day disclosure period. Talos's attack chain starts with a SQL injection (CVE-2023-22319) that bypasses MilesightVPN's login and yields an OpenVPN configuration file, then uses a pre-authentication stack buffer overflow in the router's uhttpd binary (CVE-2023-23902) to reach root on the UR32L.
What you should know: The router in this scenario is never exposed to the internet, yet a single SQL injection on the internet-facing VPN server is enough to hand an attacker the tunnel configuration and a path to root on the device behind it. Milesight released firmware 32.3.0.7 on Aug. 4, 2023 to address the issues, and Talos confirmed they no longer reproduce on that version.
Read the original at Cisco Talos ↗
- Topics
- Vulnerabilities & Patching
- Mentions
- CVE-2023-22319
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