CVE-2020-5902: F5 BIG-IP Traffic Management User Interface (TMUI) Remote Code Execution, actively exploited

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.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

F5 Big-ip Access Policy Manager≥ 11.6.1 < 11.6.5.2 · ≥ 12.1.0 < 12.1.5.2 · ≥ 13.1.0 < 13.1.3.4 · ≥ 14.1.0 < 14.1.2.6

F5 Big-ip Advanced Firewall Manager≥ 11.6.1 < 11.6.5.2 · ≥ 12.1.0 < 12.1.5.2 · ≥ 13.1.0 < 13.1.3.4 · ≥ 14.1.0 < 14.1.2.6

F5 Big-ip Advanced Web Application Firewall≥ 11.6.1 < 11.6.5.2 · ≥ 12.1.0 < 12.1.5.2 · ≥ 13.1.0 < 13.1.3.4 · ≥ 14.1.0 < 14.1.2.6

F5 Big-ip Analytics≥ 11.6.1 < 11.6.5.2 · ≥ 12.1.0 < 12.1.5.2 · ≥ 13.1.0 < 13.1.3.4 · ≥ 14.1.0 < 14.1.2.6

F5 Big-ip Application Acceleration Manager≥ 11.6.1 < 11.6.5.2 · ≥ 12.1.0 < 12.1.5.2 · ≥ 13.1.0 < 13.1.3.4 · ≥ 14.1.0 < 14.1.2.6

F5 Big-ip Application Security Manager≥ 11.6.1 < 11.6.5.2 · ≥ 12.1.0 < 12.1.5.2 · ≥ 13.1.0 < 13.1.3.4 · ≥ 14.1.0 < 14.1.2.6

F5 Big-ip Ddos Hybrid Defender≥ 11.6.1 < 11.6.5.2 · ≥ 12.1.0 < 12.1.5.2 · ≥ 13.1.0 < 13.1.3.4 · ≥ 14.1.0 < 14.1.2.6

F5 Big-ip Domain Name System≥ 11.6.1 < 11.6.5.2 · ≥ 12.1.0 < 12.1.5.2 · ≥ 13.1.0 < 13.1.3.4 · ≥ 14.1.0 < 14.1.2.6

F5 Big-ip Fraud Protection Service≥ 11.6.1 < 11.6.5.2 · ≥ 12.1.0 < 12.1.5.2 · ≥ 13.1.0 < 13.1.3.4 · ≥ 14.1.0 < 14.1.2.6

F5 Big-ip Global Traffic Manager≥ 11.6.1 < 11.6.5.2 · ≥ 12.1.0 < 12.1.5.2 · ≥ 13.1.0 < 13.1.3.4 · ≥ 14.1.0 < 14.1.2.6

F5 Big-ip Link Controller≥ 11.6.1 < 11.6.5.2 · ≥ 12.1.0 < 12.1.5.2 · ≥ 13.1.0 < 13.1.3.4 · ≥ 14.1.0 < 14.1.2.6

F5 Big-ip Local Traffic Manager≥ 11.6.1 < 11.6.5.2 · ≥ 12.1.0 < 12.1.5.2 · ≥ 13.1.0 < 13.1.3.4 · ≥ 14.1.0 < 14.1.2.6

F5 Big-ip Policy Enforcement Manager≥ 11.6.1 < 11.6.5.2 · ≥ 12.1.0 < 12.1.5.2 · ≥ 13.1.0 < 13.1.3.4 · ≥ 14.1.0 < 14.1.2.6

F5 SSL Orchestrator≥ 11.6.1 < 11.6.5.2 · ≥ 12.1.0 < 12.1.5.2 · ≥ 13.1.0 < 13.1.3.4 · ≥ 14.1.0 < 14.1.2.6

Remediation

Fixed in

F5 Big-ip Access Policy Manager≥ 11.6.5.2

F5 Big-ip Advanced Firewall Manager≥ 11.6.5.2

F5 Big-ip Advanced Web Application Firewall≥ 11.6.5.2

F5 Big-ip Analytics≥ 11.6.5.2

F5 Big-ip Application Acceleration Manager≥ 11.6.5.2

F5 Big-ip Application Security Manager≥ 11.6.5.2

F5 Big-ip Ddos Hybrid Defender≥ 11.6.5.2

F5 Big-ip Domain Name System≥ 11.6.5.2

F5 Big-ip Fraud Protection Service≥ 11.6.5.2

F5 Big-ip Global Traffic Manager≥ 11.6.5.2

Patch & vendor advisories

https://support.f5.com/csp/article/K52145254

References

http://packetstormsecurity.com/files/158333/BIG-IP-TMUI-Remote-Code-Execution.htmlExploitThird Party AdvisoryVDB Entry
http://packetstormsecurity.com/files/158334/BIG-IP-TMUI-Remote-Code-Execution.htmlThird Party AdvisoryVDB Entry
http://packetstormsecurity.com/files/158366/F5-BIG-IP-TMUI-Directory-Traversal-File-Upload-Code-Execution.htmlExploitThird Party AdvisoryVDB Entry
http://packetstormsecurity.com/files/158414/Checker-CVE-2020-5902.htmlThird Party AdvisoryVDB Entry
http://packetstormsecurity.com/files/158581/F5-Big-IP-13.1.3-Build-0.0.6-Local-File-Inclusion.htmlExploitThird Party AdvisoryVDB Entry
http://packetstormsecurity.com/files/175671/F5-BIG-IP-TMUI-Directory-Traversal-File-Upload-Code-Execution.htmlExploitThird Party AdvisoryVDB Entry
https://badpackets.net/over-3000-f5-big-ip-endpoints-vulnerable-to-cve-2020-5902/ExploitThird Party Advisory
https://github.com/Critical-Start/Team-Ares/tree/master/CVE-2020-5902Broken LinkExploitThird Party Advisory
https://support.f5.com/csp/article/K52145254Vendor Advisory
https://swarm.ptsecurity.com/rce-in-f5-big-ip/ExploitThird Party Advisory

and 3 more references

Related CVEs

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Frequently asked

Is CVE-2020-5902 being actively exploited?

Yes. CVE-2020-5902 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 3 Nov 2021. It has been used in ransomware campaigns.

How severe is CVE-2020-5902?

CVE-2020-5902 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 100.0% probability of exploitation.

Which products are affected by CVE-2020-5902?

Affected products include F5 Big-ip Access Policy Manager, F5 Big-ip Advanced Firewall Manager, F5 Big-ip Advanced Web Application Firewall, F5 Big-ip Analytics, F5 Big-ip Application Acceleration Manager, and 9 more.

How do I fix CVE-2020-5902?

Upgrade affected software to a fixed version, for example F5 Big-ip Access Policy Manager 11.6.5.2, F5 Big-ip Advanced Firewall Manager 11.6.5.2, F5 Big-ip Advanced Web Application Firewall 11.6.5.2 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2020-5902 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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