Auth bypass in F5 Big-Ip Access Policy Manager

CVE-2018-5520

On an F5 BIG-IP 13.0.0-13.1.0.5, 12.1.0-12.1.3.1, or 11.2.1-11.6.3.1 system configured in Appliance mode, the TMOS Shell (tmsh) may allow an administrative user to use the dig utility to gain unauthorized access to file system resources.

Vulnerability class: Broken Access Control

EPSS: 0.010 (60.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N.

Affected products

Weakness classification (CWE)

References

  • f5sirt@f5.com (x_refsource_CONFIRM, Vendor Advisory)
  • f5sirt@f5.com (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_SECTRACK)

Frequently asked questions

What is CVE-2018-5520?
CVE-2018-5520 is a medium-severity vulnerability in F5 Big-Ip Access Policy Manager, classified under Incorrect Authorization. CVSS score: 4.4/10. Published 2018-05-02.
How severe is CVE-2018-5520?
Medium severity. CVSS v3 base score is 4.4 out of 10.