CVE-2024-3661
Severity CVSS v4.0:
Pending analysis
Type:
CWE-306
Missing Authentication for Critical Function
Publication date:
06/05/2024
Last modified:
15/01/2025
Description
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.
Impact
Base Score 3.x
7.60
Severity 3.x
HIGH
Vulnerable products and versions
| CPE | From | Up to |
|---|---|---|
| cpe:2.3:a:fortinet:forticlient:*:*:*:*:*:linux:*:* | 6.4.0 (including) | 7.2.5 (excluding) |
| cpe:2.3:a:fortinet:forticlient:*:*:*:*:*:macos:*:* | 6.4.0 (including) | 7.2.5 (excluding) |
| cpe:2.3:a:fortinet:forticlient:*:*:*:*:*:windows:*:* | 6.4.0 (including) | 7.2.5 (excluding) |
| cpe:2.3:a:fortinet:forticlient:7.4.0:*:*:*:*:linux:*:* | ||
| cpe:2.3:a:fortinet:forticlient:7.4.0:*:*:*:*:macos:*:* | ||
| cpe:2.3:a:fortinet:forticlient:7.4.0:*:*:*:*:windows:*:* | ||
| cpe:2.3:a:cisco:anyconnect_vpn_client:-:*:*:*:*:*:*:* | ||
| cpe:2.3:a:cisco:secure_client:-:*:*:*:*:*:*:* | ||
| cpe:2.3:a:paloaltonetworks:globalprotect:*:*:*:*:*:iphone_os:*:* | ||
| cpe:2.3:a:paloaltonetworks:globalprotect:*:*:*:*:*:linux:*:* | ||
| cpe:2.3:a:paloaltonetworks:globalprotect:*:*:*:*:*:macos:*:* | ||
| cpe:2.3:a:paloaltonetworks:globalprotect:*:*:*:*:*:windows:*:* | ||
| cpe:2.3:a:citrix:secure_access_client:*:*:*:*:*:*:*:* | 24.06.1 (excluding) | |
| cpe:2.3:o:apple:iphone_os:-:*:*:*:*:*:*:* | ||
| cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* |
To consult the complete list of CPE names with products and versions, see this page
References to Advisories, Solutions, and Tools
- 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://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.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
- 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://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.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