CVE-2020-29010 - FortiOS Sensitive Information Exposure Vulnerability Potentially Affecting SSL VPN Events Logs

CVE-2020-29010 refers to a sensitive information exposure vulnerability that impacts FortiOS versions 6.2.4 and below, as well as version 6..10 and below. Fortinet FortiOS is a widely used operating system that manages security functions for enterprise networks, inclusive of SSL VPN connections. This vulnerability allows authenticated remote attackers to potentially access SSL VPN events logs of other users within different Virtual Domain (VDOM) environments. This sensitive information includes usernames, user groups, and IP addresses.

Original References

- CVE-2020-29010: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-29010
- FortiOS 6.2.4 Release Notes: https://docs.fortinet.com/document/fortigate/6.2.4/release-notes
- FortiOS 6..10 Release Notes: https://docs.fortinet.com/document/fortigate/6..10/release-notes

Code Snippet

The vulnerability exploits the "get vpn ssl monitor" command available within the Command Line Interface (CLI) of FortiOS systems. The attacker would simply execute the following command to access the SSL VPN events logs:

get vpn ssl monitor

Upon successful execution, sensitive information pertaining to other users in different VDOMs becomes accessible. The displayed data would resemble the following format:

sslvpn-session-info: {username=user123, user_group=example_group, src_ip=192.168.1.10}

Exploit Details

An attacker who has authenticated access to the affected FortiOS system can take advantage of this vulnerability by executing the "get vpn ssl monitor" command within the CLI. This grants them unauthorized access to sensitive information from users belonging to other VDOMs, including their usernames, associated user groups, and IP addresses.

This sensitive information can be potentially misused by the attacker for various purposes such as executing targeted phishing attacks or attempting unauthorized access to additional systems. As a result, it undermines the security and privacy of affected users and possibly elevates the risk of more damaging attacks against the enterprise network.

Mitigation Steps

Fortinet, the company behind FortiOS, has released patches for the affected versions. It is highly advised that you upgrade your FortiOS system to the latest version available to address this vulnerability. This can be done by referring to the Fortinet documentation and following the prescribed upgrade procedures.

For FortiOS 6.2.4 and below, you should upgrade to the following patched version

- FortiOS 6.2.5: https://docs.fortinet.com/document/fortigate/6.2.5/release-notes

For FortiOS 6..10 and below, you should upgrade to the following patched version

- FortiOS 6..11: https://docs.fortinet.com/document/fortigate/6..11/release-notes

Summary

Being aware of vulnerabilities like the CVE-2020-29010 FortiOS sensitive information exposure, and promptly applying patches, is crucial to maintain the security and privacy of users and enterprise networks. To protect your FortiOS environment, ensure that you stay up-to-date with the latest released software and adhere to best security practices, designed to minimize the risk of exploitation by unauthorized actors.

Timeline

Published on: 03/17/2025 14:15:16 UTC