Vulnerability in F5 Big-Ip Access Policy Manager
CVE-2016-9256
In F5 BIG-IP 12.1.0 through 12.1.2, permissions enforced by iControl can lag behind the actual permissions assigned to a user if the role_map is not reloaded between the time the permissions are changed and the time of the user's next request. This is a race condition that occurs rarely in normal usage; the typical period in which this is possible is limited to at most a few seconds after the permission change.
Vulnerability class: Race Condition
EPSS: 0.010 (60.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- F5 Big-ip_access_policy_manager — versions 12.0.0, 12.1.0, 12.1.1
- F5 Big-ip_advanced_firewall_manager — versions 12.0.0, 12.1.0, 12.1.1
- F5 Big-ip_analytics — versions 12.0.0, 12.1.0, 12.1.1
- F5 Big-ip_application_acceleration_manager — versions 12.0.0, 12.1.0, 12.1.1
- F5 Big-ip_application_security_manager — versions 12.0.0, 12.1.0, 12.1.1
- F5 Big-ip_domain_name_system — versions 12.0.0, 12.1.0, 12.1.1
- F5 Big-ip_link_controller — versions 12.0.0, 12.1.0, 12.1.1
- F5 Big-ip_local_traffic_manager — versions 12.0.0, 12.1.0, 12.1.1
- F5 Big-ip_policy_enforcement_manager — versions 12.0.0, 12.1.0, 12.1.1
- F5 Big-ip_websafe — versions 12.0.0, 12.1.0, 12.1.1
Weakness classification (CWE)
References
- f5sirt@f5.com (x_refsource_CONFIRM, Vendor Advisory)
- f5sirt@f5.com (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
Frequently asked questions
- What is CVE-2016-9256?
- CVE-2016-9256 is a high-severity vulnerability in F5 Big-Ip Access Policy Manager, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 7.5/10. Published 2017-05-09.
- How severe is CVE-2016-9256?
- High severity. CVSS v3 base score is 7.5 out of 10.