# CVE-2020-5902: F5 BIG-IP TMUI - RCE

> Live exploitation tracking for CVE-2020-5902 by the CrowdSec Live Exploit Tracker, built from real-world attack data crowdsourced from CrowdSec's global network.

Page: https://tracker.crowdsec.net/cves/CVE-2020-5902

## Key facts

- **Exploitation phase:** Background Noise. Continuous low-level scanning or exploitation attempts are observed, mostly opportunistic and automated.
- **CVSS score:** 9.8
- **Public exploit available:** Yes
- **Affected products:** F5 BIG-IP
- **Weaknesses:** CWE-22 (Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')); CWE-829 (Inclusion of Functionality from Untrusted Control Sphere)
- **Tags:** firewall, enterprise_software

## Description

In BIG-IP versions 15.0.0-15.1.0.3, 14.1.0-14.1.2.5, 13.1.0-13.1.3.3, 12.1.0-12.1.5.1, and 11.6.1-11.6.5.1, the Traffic Management User Interface (TMUI), also referred to as the Configuration utility, has a Remote Code Execution (RCE) vulnerability in undisclosed pages.

## CrowdSec analysis

[CVE-2020-5902](https://euvd.enisa.europa.eu/vulnerability/CVE-2020-5902) is a critical remote code execution vulnerability in the Traffic Management User Interface (TMUI) of F5 BIG-IP systems, potentially allowing attackers to execute arbitrary commands.

CrowdSec has been tracking this vulnerability and its exploits since 9th of December 2021.

Based on data from the CrowdSec network, nearly all observed exploitation of CVE-2020-5902 is fully opportunistic, with attackers indiscriminately scanning the entire internet. These attacks are automated and lack any form of target selection or reconnaissance.
Additionally, according to week-over-week analysis by CrowdSec, exploitation of CVE-2020-5902 is surging. Attack volumes are spiking well above historical norms, indicating widespread and escalating interest from threat actors. CVE-2020-5902 is currently experiencing high visibility and active exploitation across the internet.

Exploitation attempts can often be identified by requests to URLs containing `/tmui/login.jsp/..;/tmui`.

## Timeline

- 2020-07-01: CVE Published. CVE-2020-5902 is published to NVD.
- 2021-11-03: CISA KEV. CVE-2020-5902 is added to the Known Exploited Vulnerabilities catalog by CISA.
- 2021-12-09: Rule Released. CrowdSec releases a rule to detect CVE-2020-5902 exploitation attempts against the CrowdSec Network.
- 2021-12-09: CrowdSec First Seen. CrowdSec observes in-the-wild exploitation of CVE-2020-5902 for the first time.
- 2022-05-03: CISA Remediation Deadline. Expiration of the CISA remediation deadline as described in [BOD 22-01](https://www.cisa.gov/news-events/directives/bod-22-01-reducing-significant-risk-known-exploited-vulnerabilities).

## References

- https://www.kb.cert.org/vuls/id/290915
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2020/CVE-2020-5902.yaml

## Live exploitation data

The [Live Exploit Tracker page](https://tracker.crowdsec.net/cves/CVE-2020-5902) follows observed exploitation activity for CVE-2020-5902. [Request an API key](https://tracker.crowdsec.net/request-api-key) for full access to its exploitation timeline, attacking IP addresses and blocklists.