CVE-2023-36671
Published: 9 August 2023
An issue was discovered in the Clario VPN client through 5.9.1.1662 for macOS. The VPN client insecurely configures the operating system such that all IP traffic to the VPN server's IP address is sent in plaintext outside the VPN tunnel even if this traffic is not generated by the VPN client. This allows an adversary to trick the victim into sending plaintext traffic to the VPN server's IP address and thereby deanonymize the victim. NOTE: the tunnelcrack.mathyvanhoef.com website uses this CVE ID to refer more generally to "ServerIP attack for only traffic to the real IP address of the VPN server" rather than to only Clario.
Notes
Author | Note |
---|---|
mdeslaur | other VPN software may also be affected. See whitepaper for the complete list. |
evancaville | as of 2024-02-05, there doesn't appear to be an upstream fix available for network-manager-openvpn, openvpn packages. as of 2024-02-29, there doesn't appear to be an upstream fix available for network-manager-pptp, pptp-linux. |
mdeslaur | as of 2024-04-15, this CVE appears to be specific to the Clario VPN client, marking all Ubuntu packages as not-affected |
Priority
Status
Package | Release | Status |
---|---|---|
connman Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
focal |
Not vulnerable
|
|
jammy |
Not vulnerable
|
|
lunar |
Ignored
(end of life, was not-affected)
|
|
mantic |
Not vulnerable
|
|
trusty |
Ignored
(end of standard support)
|
|
upstream |
Not vulnerable
|
|
xenial |
Not vulnerable
|
|
gadmin-openvpn-client Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
focal |
Not vulnerable
|
|
jammy |
Does not exist
|
|
lunar |
Does not exist
|
|
mantic |
Does not exist
|
|
trusty |
Ignored
(end of standard support)
|
|
upstream |
Not vulnerable
|
|
xenial |
Not vulnerable
|
|
gadmin-openvpn-server Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
focal |
Not vulnerable
|
|
jammy |
Does not exist
|
|
lunar |
Does not exist
|
|
mantic |
Does not exist
|
|
trusty |
Ignored
(end of standard support)
|
|
upstream |
Not vulnerable
|
|
xenial |
Not vulnerable
|
|
golang-github-apparentlymart-go-openvpn-mgmt Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
focal |
Not vulnerable
|
|
jammy |
Not vulnerable
|
|
lunar |
Ignored
(end of life, was not-affected)
|
|
mantic |
Not vulnerable
|
|
trusty |
Does not exist
|
|
upstream |
Not vulnerable
|
|
xenial |
Does not exist
|
|
kvpnc Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
focal |
Does not exist
|
|
jammy |
Does not exist
|
|
lunar |
Does not exist
|
|
mantic |
Does not exist
|
|
trusty |
Ignored
(end of standard support)
|
|
upstream |
Not vulnerable
|
|
xenial |
Not vulnerable
|
|
l2tp-ipsec-vpn Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
focal |
Does not exist
|
|
jammy |
Does not exist
|
|
lunar |
Does not exist
|
|
mantic |
Does not exist
|
|
trusty |
Ignored
(end of standard support)
|
|
upstream |
Not vulnerable
|
|
xenial |
Does not exist
|
|
l2tp-ipsec-vpn-daemon Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
focal |
Does not exist
|
|
jammy |
Does not exist
|
|
lunar |
Does not exist
|
|
mantic |
Does not exist
|
|
trusty |
Ignored
(end of standard support)
|
|
upstream |
Not vulnerable
|
|
xenial |
Does not exist
|
|
libreswan Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
focal |
Not vulnerable
|
|
jammy |
Not vulnerable
|
|
lunar |
Ignored
(end of life, was not-affected)
|
|
mantic |
Not vulnerable
|
|
trusty |
Does not exist
|
|
upstream |
Not vulnerable
|
|
xenial |
Does not exist
|
|
mozillavpn Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
focal |
Does not exist
|
|
jammy |
Not vulnerable
|
|
lunar |
Does not exist
|
|
mantic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Not vulnerable
|
|
xenial |
Does not exist
|
|
n2n Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
focal |
Not vulnerable
|
|
jammy |
Not vulnerable
|
|
lunar |
Ignored
(end of life, was not-affected)
|
|
mantic |
Not vulnerable
|
|
trusty |
Ignored
(end of standard support)
|
|
upstream |
Not vulnerable
|
|
xenial |
Not vulnerable
|
|
network-manager-fortisslvpn Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
focal |
Not vulnerable
|
|
jammy |
Not vulnerable
|
|
lunar |
Ignored
(end of life, was not-affected)
|
|
mantic |
Not vulnerable
|
|
trusty |
Does not exist
|
|
upstream |
Not vulnerable
|
|
xenial |
Does not exist
|
|
network-manager-iodine Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
focal |
Not vulnerable
|
|
jammy |
Not vulnerable
|
|
lunar |
Ignored
(end of life, was not-affected)
|
|
mantic |
Not vulnerable
|
|
trusty |
Ignored
(end of standard support)
|
|
upstream |
Not vulnerable
|
|
xenial |
Not vulnerable
|
|
network-manager-l2tp Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
focal |
Not vulnerable
|
|
jammy |
Not vulnerable
|
|
lunar |
Ignored
(end of life, was not-affected)
|
|
mantic |
Not vulnerable
|
|
trusty |
Does not exist
|
|
upstream |
Not vulnerable
|
|
xenial |
Does not exist
|
|
network-manager-openconnect Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
focal |
Not vulnerable
|
|
jammy |
Not vulnerable
|
|
lunar |
Ignored
(end of life, was not-affected)
|
|
mantic |
Not vulnerable
|
|
trusty |
Ignored
(end of standard support)
|
|
upstream |
Not vulnerable
|
|
xenial |
Not vulnerable
|
|
network-manager-openvpn Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
focal |
Not vulnerable
|
|
jammy |
Not vulnerable
|
|
lunar |
Ignored
(end of life, was needed)
|
|
mantic |
Not vulnerable
|
|
trusty |
Ignored
(end of standard support)
|
|
upstream |
Not vulnerable
|
|
xenial |
Not vulnerable
|
|
network-manager-pptp Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
focal |
Not vulnerable
|
|
jammy |
Not vulnerable
|
|
lunar |
Ignored
(end of life, was not-affected)
|
|
mantic |
Not vulnerable
|
|
trusty |
Ignored
(end of standard support)
|
|
upstream |
Not vulnerable
|
|
xenial |
Not vulnerable
|
|
network-manager-sstp Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
focal |
Does not exist
|
|
jammy |
Not vulnerable
|
|
lunar |
Ignored
(end of life, was not-affected)
|
|
mantic |
Not vulnerable
|
|
trusty |
Does not exist
|
|
upstream |
Does not exist
|
|
xenial |
Does not exist
|
|
network-manager-strongswan Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
focal |
Not vulnerable
|
|
jammy |
Not vulnerable
|
|
lunar |
Ignored
(end of life, was not-affected)
|
|
mantic |
Not vulnerable
|
|
trusty |
Ignored
(end of standard support)
|
|
upstream |
Not vulnerable
|
|
xenial |
Not vulnerable
|
|
network-manager-vpnc Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
focal |
Not vulnerable
|
|
jammy |
Not vulnerable
|
|
lunar |
Ignored
(end of life, was not-affected)
|
|
mantic |
Not vulnerable
|
|
trusty |
Ignored
(end of standard support)
|
|
upstream |
Not vulnerable
|
|
xenial |
Not vulnerable
|
|
openconnect Launchpad, Ubuntu, Debian |
bionic |
Needed
|
focal |
Needed
|
|
jammy |
Needed
|
|
lunar |
Ignored
(end of life, was needed)
|
|
mantic |
Needed
|
|
trusty |
Ignored
(end of standard support)
|
|
upstream |
Not vulnerable
|
|
xenial |
Needed
|
|
openfortivpn Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
focal |
Not vulnerable
|
|
jammy |
Not vulnerable
|
|
lunar |
Ignored
(end of life, was not-affected)
|
|
mantic |
Not vulnerable
|
|
trusty |
Does not exist
|
|
upstream |
Not vulnerable
|
|
xenial |
Does not exist
|
|
openvpn Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
focal |
Not vulnerable
|
|
jammy |
Not vulnerable
|
|
lunar |
Ignored
(end of life, was needed)
|
|
mantic |
Not vulnerable
|
|
trusty |
Not vulnerable
|
|
upstream |
Not vulnerable
|
|
xenial |
Not vulnerable
|
|
pptp-linux Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
focal |
Not vulnerable
|
|
jammy |
Not vulnerable
|
|
lunar |
Ignored
(end of life, was not-affected)
|
|
mantic |
Not vulnerable
|
|
trusty |
Ignored
(end of standard support)
|
|
upstream |
Not vulnerable
|
|
xenial |
Not vulnerable
|
|
quicktun Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
focal |
Not vulnerable
|
|
jammy |
Not vulnerable
|
|
lunar |
Ignored
(end of life, was not-affected)
|
|
mantic |
Not vulnerable
|
|
trusty |
Does not exist
|
|
upstream |
Not vulnerable
|
|
xenial |
Does not exist
|
|
riseup-vpn Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
focal |
Does not exist
|
|
jammy |
Does not exist
|
|
lunar |
Ignored
(end of life, was not-affected)
|
|
mantic |
Not vulnerable
|
|
trusty |
Does not exist
|
|
upstream |
Not vulnerable
|
|
xenial |
Does not exist
|
|
softether-vpn Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
focal |
Does not exist
|
|
jammy |
Needed
|
|
lunar |
Ignored
(end of life, was needed)
|
|
mantic |
Needed
|
|
trusty |
Does not exist
|
|
upstream |
Not vulnerable
|
|
xenial |
Does not exist
|
|
Patches: upstream: https://github.com/SoftEtherVPN/SoftEtherVPN_Stable/commit/556bc0afe2333b7f2ea8f6f91fce90e53605b992 |
||
sshuttle Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
focal |
Not vulnerable
|
|
jammy |
Not vulnerable
|
|
lunar |
Ignored
(end of life, was not-affected)
|
|
mantic |
Not vulnerable
|
|
trusty |
Ignored
(end of standard support)
|
|
upstream |
Not vulnerable
|
|
xenial |
Not vulnerable
|
|
tinc Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
focal |
Not vulnerable
|
|
jammy |
Not vulnerable
|
|
lunar |
Ignored
(end of life, was not-affected)
|
|
mantic |
Not vulnerable
|
|
trusty |
Ignored
(end of standard support)
|
|
upstream |
Not vulnerable
|
|
xenial |
Not vulnerable
|
|
vpnc Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
focal |
Not vulnerable
|
|
jammy |
Not vulnerable
|
|
lunar |
Ignored
(end of life, was not-affected)
|
|
mantic |
Not vulnerable
|
|
trusty |
Ignored
(end of standard support)
|
|
upstream |
Not vulnerable
|
|
xenial |
Not vulnerable
|
|
wireguard Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
focal |
Not vulnerable
|
|
jammy |
Not vulnerable
|
|
lunar |
Ignored
(end of life, was not-affected)
|
|
mantic |
Not vulnerable
|
|
trusty |
Ignored
(end of standard support)
|
|
upstream |
Not vulnerable
|
|
xenial |
Not vulnerable
|
|
zentyal-openvpn Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
focal |
Does not exist
|
|
jammy |
Does not exist
|
|
lunar |
Does not exist
|
|
mantic |
Does not exist
|
|
trusty |
Ignored
(end of standard support)
|
|
upstream |
Not vulnerable
|
|
xenial |
Does not exist
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 6.3 |
Attack vector | Local |
Attack complexity | High |
Privileges required | None |
User interaction | Required |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | High |
Availability impact | None |
Vector | CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N |
References
- https://tunnelcrack.mathyvanhoef.com/details.html
- https://papers.mathyvanhoef.com/usenix2023-tunnelcrack.pdf
- https://openvpn.net/security-advisory/statement-regarding-tunnelcrack-vulnerabilities/
- https://www.softether.org/9-about/News/905-TunnelCrack
- https://www.cve.org/CVERecord?id=CVE-2023-36671
- NVD
- Launchpad
- Debian