CVE-2024-3661

DHCP can add routes to a client’s routing table via the classless static route option (121). VPN-based security solutions that rely on routes to redirect traffic can be forced to leak traffic over the physical interface. An attacker on the same local network can read, disrupt, or possibly modify network traffic that was expected to be protected by the VPN.

The following products are affected by CVE-2024-3661 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2024-3661.

URL	Resource
https://arstechnica.com/security/2024/05/novel-attack-against-virtually-all-vpn-apps-neuters-their-entire-purpose/
https://bst.cisco.com/quickview/bug/CSCwk05814
https://datatracker.ietf.org/doc/html/rfc2131#section-7
https://datatracker.ietf.org/doc/html/rfc3442#section-7
https://fortiguard.fortinet.com/psirt/FG-IR-24-170
https://issuetracker.google.com/issues/263721377
https://krebsonsecurity.com/2024/05/why-your-vpn-may-not-be-as-secure-as-it-claims/
https://lowendtalk.com/discussion/188857/a-rogue-dhcp-server-within-your-network-can-and-will-hijack-your-vpn-traffic
https://mullvad.net/en/blog/evaluating-the-impact-of-tunnelvision
https://my.f5.com/manage/s/article/K000139553
https://news.ycombinator.com/item?id=40279632
https://news.ycombinator.com/item?id=40284111
https://nvd.nist.gov/vuln/detail/CVE-2024-3661
https://security.paloaltonetworks.com/CVE-2024-3661
https://support.citrix.com/article/CTX677069/cloud-software-group-security-advisory-for-cve20243661
https://tunnelvisionbug.com/
https://www.agwa.name/blog/post/hardening_openvpn_for_def_con
https://www.cve.org/CVERecord?id=CVE-2024-3661
https://www.leviathansecurity.com/research/tunnelvision
https://www.theregister.com/2024/05/07/vpn_tunnelvision_dhcp/
https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2024-00009
https://www.zscaler.com/blogs/security-research/cve-2024-3661-k-tunnelvision-exposes-vpn-bypass-vulnerability