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CVE-2023-36672

Publication date 9 August 2023

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

5.7 · Medium

Score breakdown

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 traffic to the local network is sent in plaintext outside the VPN tunnel even if the local network is using a non-RFC1918 IP subnet. This allows an adversary to trick the victim into sending arbitrary IP traffic in plaintext outside the VPN tunnel. NOTE: the tunnelcrack.mathyvanhoef.com website uses this CVE ID to refer more generally to "LocalNet attack resulting in leakage of traffic in plaintext" rather than to only Clario.

Read the notes from the security team

Status

Package Ubuntu Release Status
connman 24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar Ignored
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty Ignored
gadmin-openvpn-client 24.04 LTS noble Not in release
23.10 mantic Not in release
23.04 lunar Not in release
22.04 LTS jammy Not in release
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty Ignored
gadmin-openvpn-server 24.04 LTS noble Not in release
23.10 mantic Not in release
23.04 lunar Not in release
22.04 LTS jammy Not in release
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty Ignored
golang-github-apparentlymart-go-openvpn-mgmt 24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar Ignored
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
kvpnc 24.04 LTS noble Not in release
23.10 mantic Not in release
23.04 lunar Not in release
22.04 LTS jammy Not in release
20.04 LTS focal Not in release
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty Ignored
l2tp-ipsec-vpn 24.04 LTS noble Not in release
23.10 mantic Not in release
23.04 lunar Not in release
22.04 LTS jammy Not in release
20.04 LTS focal Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Ignored
l2tp-ipsec-vpn-daemon 24.04 LTS noble Not in release
23.10 mantic Not in release
23.04 lunar Not in release
22.04 LTS jammy Not in release
20.04 LTS focal Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Ignored
libreswan 24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar Ignored
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
mozillavpn 24.04 LTS noble Not in release
23.10 mantic Not in release
23.04 lunar Not in release
22.04 LTS jammy
Not affected
20.04 LTS focal Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
n2n 24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar Ignored
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty Ignored
network-manager-fortisslvpn 24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar Ignored
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
network-manager-iodine 24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar Ignored
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty Ignored
network-manager-l2tp 24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar Ignored
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
network-manager-openconnect 24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar Ignored
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty Ignored
network-manager-openvpn 24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar Ignored
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty Ignored
network-manager-pptp 24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar Ignored
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty Ignored
network-manager-sstp 24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar Ignored
22.04 LTS jammy
Not affected
20.04 LTS focal Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
network-manager-strongswan 24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar Ignored
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty Ignored
network-manager-vpnc 24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar Ignored
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty Ignored
openconnect 24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar Ignored
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Vulnerable
16.04 LTS xenial
Vulnerable
14.04 LTS trusty Ignored
openfortivpn 24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar Ignored
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
openvpn 24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar Ignored
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected
pptp-linux 24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar Ignored
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty Ignored
quicktun 24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar Ignored
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
riseup-vpn 24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar Ignored
22.04 LTS jammy Not in release
20.04 LTS focal Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
softether-vpn 24.04 LTS noble
Vulnerable
23.10 mantic Ignored
23.04 lunar Ignored
22.04 LTS jammy
Vulnerable
20.04 LTS focal Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
sshuttle 24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar Ignored
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty Ignored
tinc 24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar Ignored
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty Ignored
vpnc 24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar Ignored
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty Ignored
wireguard 24.04 LTS noble Ignored
23.10 mantic Ignored
23.04 lunar Ignored
22.04 LTS jammy Ignored
20.04 LTS focal Ignored
18.04 LTS bionic Ignored
16.04 LTS xenial Ignored
14.04 LTS trusty Ignored
zentyal-openvpn 24.04 LTS noble Not in release
23.10 mantic Not in release
23.04 lunar Not in release
22.04 LTS jammy Not in release
20.04 LTS focal Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Ignored

Notes

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. wireguard itself is not vulnerable, however the wg-quick tool includes local network access. See the wg-quick manpage and documentation on methods to disable this.

mdeslaur

as of 2024-04-15, this CVE appears to be specific to the Clario VPN client, marking all Ubuntu packages as not-affected

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
softether-vpn

Severity score breakdown

Parameter Value
Base score 5.7 · Medium
Attack vector Adjacent
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N