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CVE-2024-3661 Detail

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.


Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink 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://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

Weakness Enumeration

CWE-ID CWE Name Source
CWE-306 Missing Authentication for Critical Function Cybersecurity and Infrastructure Security Agency (CISA) U.S. Civilian Government  
CWE-501 Trust Boundary Violation Cybersecurity and Infrastructure Security Agency (CISA) U.S. Civilian Government  

Change History

9 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2024-3661
NVD Published Date:
05/06/2024
NVD Last Modified:
07/01/2024
Source:
Cybersecurity and Infrastructure Security Agency (CISA) U.S. Civilian Government