Security Resilience

CVE-2023-22839

Memory Safety in F5 Big-Ip Domain Name System 13.1.0 – 13.1.5

Memory Safety
Published
01 February 2023
Modified
21 November 2024
Patch / advisory
View 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-2023-22839 is a high-severity NULL Pointer Dereference (CWE-476) vulnerability in F5 Big-Ip Domain Name System. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique OS Credential Dumping (T1003); ranked at the 49th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

OWASP Top 10 for Web (2025)

A10:2025 Mishandling of Exceptional Conditions

EU & UK References

Vulnerability Data

On BIG-IP versions 17.0.x before 17.0.0.2, 16.1.x before 16.1.3.3, 15.1.x before 15.1.8.1, 14.1.x before 14.1.5.3, and all version of 13.1.x, when a DNS profile with the Rapid Response Mode setting enabled is configured on a virtual server with hardware SYN…

more

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

CWE(s)
CWE-476

Related Threats

MITRE ATT&CK Enterprise Techniques

T1003 OS Credential Dumping Credential Access
Adversaries may attempt to dump credentials to obtain account login and credential material, normally in the form of a hash or a clear text password.
attack.mitre.org →
T1003.007 Proc Filesystem Credential Access
Adversaries may gather credentials from the proc filesystem or `/proc`.
attack.mitre.org →
T1006 Direct Volume Access Stealth
Adversaries may directly access a volume to bypass file access controls and file system monitoring.
attack.mitre.org →
T1011 Exfiltration Over Other Network Medium Exfiltration
Adversaries may attempt to exfiltrate data over a different network medium than the command and control channel.
attack.mitre.org →
T1012 Query Registry Discovery
Adversaries may interact with the Windows Registry to gather information about the system, configuration, and installed software.
attack.mitre.org →
T1016 System Network Configuration Discovery Discovery
Adversaries may look for details about the network configuration and settings, such as IP and/or MAC addresses, of systems they access or through information discovery of remote systems.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2024-24775Same product: F5 Big-Ip Domain Name System
CVE-2023-22340Same product: F5 Big-Ip Domain Name System
CVE-2025-20045Same product: F5 Big-Ip Domain Name System
CVE-2025-52585Same product: F5 Big-Ip Domain Name System
CVE-2025-41433Same product: F5 Big-Ip Domain Name System
CVE-2024-25560Same product: F5 Big-Ip Domain Name System
CVE-2025-41414Same product: F5 Big-Ip Domain Name System
CVE-2026-42409Same product: F5 Big-Ip Domain Name System
CVE-2024-41164Same product: F5 Big-Ip Domain Name System
CVE-2024-23308Same product class: WAF / load balancer

Affected Assets

f5
big-ip domain name system
13.1.0 — 13.1.5 · 14.1.0 — 14.1.5.3 · 15.1.0 — 15.1.7
f5
big-ip local traffic manager
13.1.0 — 13.1.5 · 14.1.0 — 14.1.5.3 · 15.1.0 — 15.1.7
f5
big-ip 10000s firmware
all versions
f5
big-ip 10200v firmware
all versions
f5
big-ip 10200v-ssl firmware
all versions
f5
big-ip 12000 firmware
all versions
f5
big-ip 5000s firmware
all versions
f5
big-ip 5200v firmware
all versions
f5
big-ip 5200v-ssl firmware
all versions
f5
big-ip 7000s firmware
all versions
+24 more product configuration(s) — see NVD for full list

Mitigating Controls

Mitigating Controls (NIST CSF 2.0) AI

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

PR.PS-06 partial match
blocks

Secure SDLC practices (static analysis, code review, safe coding standards) directly prevent NULL dereference bugs during development.

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.

A.5.14 Information transfer partial match
removes
A.5.15 Access control partial match
removes
A.5.16 Identity management partial match
removes
A.5.17 Authentication information partial match
removes
A.5.18 Access rights partial match
removes
A.8.10 Information deletion partial match
removes

References