Security Resilience

CVE-2023-23555

F5 Big-Ip Access Policy Manager 14.1.5 – 14.1.5.3

Published
01 February 2023
Modified
21 November 2024
Patch / advisory
CVSS Score v3.1 7.5
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0063 49th percentile
Risk Priority 59 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2023-23555 is a high-severity Improper Initialization (CWE-665) vulnerability in F5 Big-Ip Access Policy Manager. Its CVSS base score is 7.5 (High).

Operationally, ranked at the 49th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability Data

On BIG-IP Virtual Edition versions 15.1x beginning in 15.1.4 to before 15.1.8 and 14.1.x beginning in 14.1.5 to before 14.1.5.3, and BIG-IP SPK beginning in 1.5.0 to before 1.6.0, when FastL4 profile is configured on a virtual server, undisclosed traffic…

more

can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CWE(s)

Related Threats

CVEs Like This One

CVE-2023-22664Same product: F5 Big-Ip Access Policy Manager
CVE-2023-22418Same product: F5 Big-Ip Access Policy Manager
CVE-2023-22842Same product: F5 Big-Ip Access Policy Manager
CVE-2023-22340Same product: F5 Big-Ip Access Policy Manager
CVE-2023-22326Same product: F5 Big-Ip Access Policy Manager
CVE-2023-22422Same product: F5 Big-Ip Access Policy Manager
CVE-2023-22323Same product: F5 Big-Ip Access Policy Manager
CVE-2023-22374Same product: F5 Big-Ip Access Policy Manager
CVE-2023-22302Same product: F5 Big-Ip Access Policy Manager
CVE-2025-41431Same product: F5 Big-Ip Access Policy Manager

Affected Assets

f5
big-ip access policy manager
14.1.5 — 14.1.5.3 · 15.1.4 — 15.1.8
f5
big-ip advanced firewall manager
14.1.5 — 14.1.5.3 · 15.1.0 — 15.1.8
f5
big-ip analytics
14.1.5 — 14.1.5.3 · 15.1.4 — 15.1.8
f5
big-ip application acceleration manager
14.1.5 — 14.1.5.3 · 15.1.4 — 15.1.8
f5
big-ip application security manager
14.1.5 — 14.1.5.3 · 15.1.4 — 15.1.8
f5
big-ip ddos hybrid defender
14.1.5 — 14.1.5.3 · 15.1.4 — 15.1.8
f5
big-ip domain name system
14.1.5 — 14.1.5.3 · 15.1.4 — 15.1.8
f5
big-ip fraud protection service
14.1.5 — 14.1.5.3 · 15.1.4 — 15.1.8
f5
big-ip link controller
14.1.5 — 14.1.5.3 · 15.1.4 — 15.1.8
f5
big-ip local traffic manager
14.1.5 — 14.1.5.3 · 15.1.4 — 15.1.8
+3 more product configuration(s) — see NVD for full list

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

addresses: CWE-665

Ensures shared resources are explicitly initialized or cleared on allocation, preventing exposure of prior contents to new users or processes.

addresses: CWE-665

Mandates that every instance begins in a known (presumably clean) state, eliminating reliance on residual or uninitialized state left by prior executions.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

blocks

A.8.25 mandates security requirements, checkpoints, secure coding, testing and developer capability in the SDLC which reaches improper initialization as a design/coding defect, but leaves a bounded remainder (e.g. initialization of third-party components or libraries chosen in procurement, and post-deployment configuration defaults).

blocks

A.8.27 mandates security-by-design principles (least privilege, default-deny, fail-securely, distrust-external-input, hardening) plus explicit design reviews that can catch and block many uninitialized-resource cases before they ship, but leaves a bounded remainder (e.g. vendor libraries, runtime-initialization bugs, or post-review code changes) that can still be present and exploitable.

prevents

Secure coding standards explicitly forbid uninitialized variables and mandate proper resource initialization before use.

finds

Security testing can detect uninitialized variables but does not itself enforce initialization practices.

blocks

defining, enforcing, and monitoring secure configuration templates (including defaults, disabled services, changed vendor passwords, minimized privileges) directly stops most improper-initialization cases from being exploitable; the bounded remainder is initialization logic inside custom application code that no configuration template reaches

Hardening callouts derived

DISA STIG baselines are authored against specific weaknesses. Where this CVE cites a broad weakness class, the mapping is not asserted at that abstraction (owner ruling, 2026-09-25: grade only at Base and below), so no rule is shown here rather than a rule shown against the wrong grain.

  • No fine-grained STIG row for CWE-665, a class-level weakness. Rules are authored against its narrower children: CWE-770.

References