This can be leveraged to obtain additional VPN access.Ī vulnerability in the Internet Key Exchange Version 2 (IKEv2) implementation of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, remote attacker to trigger a denial of service (DoS) condition on an affected device. Vpn-user-portal (aka eduVPN or Let's Connect!) before 2.3.14, as packaged for Debian 10, Debian 11, and Fedora, allows remote authenticated users to obtain OS filesystem access, because of the interaction of QR codes with an exec that uses the -r option.
When a higher privileged user such as an Administrator launches that executable, it is possible for the lower privileged user to escalate to Administrator privileges. This allows lower privileged users to replace the VPN executable with a malicious one. When the software is installed with a non-default installation directory off of the system root, the installer fails to properly set ACLs.
Bitmask Riseup VPN 0.21.6 contains a local privilege escalation flaw due to improper access controls.
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