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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.010 (62.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 62.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000
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
- support.f5.com/csp/article/K47284724 (Vendor Advisory)
- www.securityfocus.com/bid/96464 (VDB Entry, Third Party Advisory, vdb-entry)
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.