Cleartext Transmission of Sensitive Information Affecting openconnect package, versions *


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.07% (32nd percentile)

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  • Snyk IDSNYK-UBUNTU2004-OPENCONNECT-6218776
  • 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)

How to fix?

There is no fixed version for Ubuntu:20.04 openconnect.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openconnect package and not the openconnect package as distributed by Ubuntu. See How to fix? for Ubuntu:20.04 relevant fixed versions and status.

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.

CVSS Scores

version 3.1