Cleartext Transmission of Sensitive Information The advisory has been revoked - it doesn't affect any version of package network-manager-openvpn  (opens in a new tab)


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EPSS
0.08% (36th percentile)

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  • Snyk IDSNYK-UBUNTU1804-NETWORKMANAGEROPENVPN-6219062
  • published31 Jan 2024
  • disclosed9 Aug 2023

Introduced: 9 Aug 2023

CVE-2023-36673  (opens in a new tab)
CWE-319  (opens in a new tab)

Amendment

The Ubuntu security team deemed this advisory irrelevant for Ubuntu:18.04.

NVD Description

Note: Versions mentioned in the description apply only to the upstream network-manager-openvpn package and not the network-manager-openvpn package as distributed by Ubuntu.

An issue was discovered in Avira Phantom VPN through 2.23.1 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, while simultaneously using plaintext DNS to look up the VPN server's IP address. This allows an adversary to trick the victim into sending traffic to arbitrary IP addresses in plaintext outside the VPN tunnel. NOTE: the tunnelcrack.mathyvanhoef.com website uses this CVE ID to refer more generally to "ServerIP attack, combined with DNS spoofing, that can leak traffic to an arbitrary IP address" rather than to only Avira Phantom VPN.