Cyber Resilience

CVE-2023-27786

Memory Safety in Broadcom Tcpreplay 4.4.3

Public PoCMemory Safety
Published
16 March 2023
Modified
26 February 2025
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 0.015 71th percentile
Risk Priority 60 floored blend · peak EPSS

Summary

CVE-2023-27786 is a high-severity NULL Pointer Dereference (CWE-476) vulnerability in Broadcom Tcpreplay. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Endpoint Denial of Service (T1499); ranked in the top 29% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

OWASP Top 10 for Web (2025)

A10:2025 Mishandling of Exceptional Conditions

EU & UK References

Vulnerability Data

An issue found in TCPprep v.4.4.3 allows a remote attacker to cause a denial of service via the macinstring function.

CWE(s)
CWE-476

Related Threats

MITRE ATT&CK Enterprise Techniques

T1499 Endpoint Denial of Service Impact
Adversaries may perform Endpoint Denial of Service (DoS) attacks to degrade or block the availability of services to users.
attack.mitre.org →
T1499.004 Application or System Exploitation Impact
Adversaries may exploit software vulnerabilities that can cause an application or system to crash and deny availability to users.
attack.mitre.org →
T1489 Service Stop Impact
Adversaries may stop or disable services on a system to render those services unavailable to legitimate users.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2023-27784Same product: Broadcom Tcpreplay
CVE-2023-27785Same product: Broadcom Tcpreplay
CVE-2023-27787Same product: Broadcom Tcpreplay
CVE-2025-9384Same product: Broadcom Tcpreplay
CVE-2023-27788Same product: Broadcom Tcpreplay
CVE-2023-27783Same product: Broadcom Tcpreplay
CVE-2023-27789Same product: Broadcom Tcpreplay
CVE-2024-22654Same product: Broadcom Tcpreplay
CVE-2023-43279Same product: Broadcom Tcpreplay
CVE-2025-9649Same product: Broadcom Tcpreplay

Affected Assets

broadcom
tcpreplay
4.4.3

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 mostly match
prevents

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.8.29 Security testing in development and acceptance mostly match
finds

Security testing can detect NULL dereference defects before release.

A.8.25 Secure development life cycle partial match
prevents

Secure SDLC mandates defensive coding practices that can prevent NULL dereferences.

A.8.26 Application security requirements partial match
prevents

Application security requirements can specify input validation and pointer-safety rules.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles encourage defensive design that avoids unsafe pointer use.

A.8.28 Secure coding partial match
prevents

Secure coding standards directly require NULL-pointer checks and safe dereference patterns.

References