In F5 BIG-IP 13.0.0, 12.1.0-12.1.2, 11.6.1, 11.5.1-11.5.5, or 11.2.1 the Apache modules apache_auth_token_mod and mod_auth_f5_auth_token.cpp allow possible unauthenticated bruteforce on the em_server_ip authorization parameter to obtain which SSL client certificates used for mutual authentication between BIG-IQ or Enterprise Manager (EM) and managed BIG-IP devices
Published Apr 13, 2018
9.8
CRITICALCVSS 3.0
EPSS 0.72%
Description
In F5 BIG-IP 13.0.0, 12.1.0-12.1.2, 11.6.1, 11.5.1-11.5.5, or 11.2.1 the Apache modules apache_auth_token_mod and mod_auth_f5_auth_token.cpp allow possible unauthenticated bruteforce on the em_server_ip authorization parameter to obtain which SSL client certificates used for mutual authentication between BIG-IQ or Enterprise Manager (EM) and managed BIG-IP devices.
Affected products
-
- Version 11.2.1StatusaffectedConstraints-
- Version 11.5.1-11.5.5StatusaffectedConstraints-
- Version 11.6.1StatusaffectedConstraints-
- Version 12.1.0-12.1.2StatusaffectedConstraints-
- Version 13.0.0StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| F5 Networks, Inc. | n/a | n/a |
|
Configuration 1
- ≥ 11.5.1 · ≤ 11.5.5
- ≥ 12.1.0 · ≤ 12.1.3.1
- 11.2.1
- 11.6.1
- 13.0.0
Configuration 2
- ≥ 11.5.1 · ≤ 11.5.5
- ≥ 12.1.0 · ≤ 12.1.3.1
- 11.2.1
- 11.6.1
- 13.0.0
Configuration 3
- ≥ 11.5.1 · ≤ 11.5.5
- ≥ 12.1.0 · ≤ 12.1.3.1
- 11.2.1
- 11.6.1
- 13.0.0
Configuration 4
- ≥ 11.5.1 · ≤ 11.5.5
- ≥ 12.1.0 · ≤ 12.1.3.1
- 11.2.1
- 11.6.1
- 13.0.0
Configuration 5
- ≥ 11.5.1 · ≤ 11.5.5
- ≥ 12.1.0 · ≤ 12.1.3.1
- 11.2.1
- 11.6.1
- 13.0.0
Configuration 6
- ≥ 11.5.1 · ≤ 11.5.5
- ≥ 12.1.0 · ≤ 12.1.3.1
- 11.2.1
- 11.6.1
- 13.0.0
Configuration 7
- ≥ 11.5.1 · ≤ 11.5.5
- ≥ 12.1.0 · ≤ 12.1.3.1
- 11.2.1
- 11.6.1
- 13.0.0
Configuration 8
- ≥ 11.5.1 · ≤ 11.5.5
- ≥ 12.1.0 · ≤ 12.1.3.1
- 11.2.1
- 11.6.1
- 13.0.0
Configuration 9
- ≥ 11.5.1 · ≤ 11.5.5
- ≥ 12.1.0 · ≤ 12.1.3.1
- 11.2.1
- 11.6.1
- 13.0.0
Configuration 10
- ≥ 11.5.1 · ≤ 11.5.5
- ≥ 12.1.0 · ≤ 12.1.3.1
- 11.2.1
- 11.6.1
- 13.0.0
Configuration 11
- ≥ 11.5.1 · ≤ 11.5.5
- ≥ 12.1.0 · ≤ 12.1.3.1
- 11.2.1
- 11.6.1
- 13.0.0
Configuration 12
- ≥ 11.5.1 · ≤ 11.5.5
- ≥ 12.1.0 · ≤ 12.1.3.1
- 11.2.1
- 11.6.1
- 13.0.0
Configuration 13
- ≥ 11.5.1 · ≤ 11.5.5
- ≥ 12.1.0 · ≤ 12.1.3.1
- 11.2.1
- 11.6.1
- 13.0.0
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AV:N/AC:L/Au:N/C:P/I:N/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.72% (0.00716) | 52.04th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.73% (0.00730) | 52.78th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.15% (0.00150) | 51.63th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.15% (0.00150) | 50.51th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.11% (0.00106) | 41.44th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.42% (0.00416) | 10.04th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.42% (0.00416) | 0.00th | v1 |
No CWE recorded.
References (1)
- https://support.f5.com/csp/article/K65355492 x_refsource_CONFIRMVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://support.f5.com/csp/article/K65355492 | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.