How severe is CVE-2023-43279?

CVE-2023-43279 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-43279 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-43279?

CVE-2023-43279 primarily affects Broadcom Tcpreplay. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-43279?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2023-43279 have an EU (EUVD) identifier?

Yes. CVE-2023-43279 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-47698.

When was CVE-2023-43279 published?

CVE-2023-43279 was published on 2024-03-12 and last updated on 2026-06-17.

CVE-2023-43279

CVE-2023-43279 is a medium-severity vulnerability in Broadcom Tcpreplay with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-476.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-47698
Weakness: CWE-476
Affected product: Broadcom Tcpreplay
Published: 2024-03-12
Last modified: 2026-06-17

Description

Null Pointer Dereference in mask_cidr6 component at cidr.c in Tcpreplay 4.4.4 allows attackers to crash the application via crafted tcprewrite command.

Frequently asked questions

What is CVE-2023-43279?: Null Pointer Dereference in mask_cidr6 component at cidr.c in Tcpreplay 4.4.4 allows attackers to crash the application via crafted tcprewrite command.
How severe is CVE-2023-43279?: CVE-2023-43279 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-43279 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-43279?: CVE-2023-43279 primarily affects Broadcom Tcpreplay. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-43279?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2023-43279 have an EU (EUVD) identifier?: Yes. CVE-2023-43279 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-47698.
When was CVE-2023-43279 published?: CVE-2023-43279 was published on 2024-03-12 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:broadcom:tcpreplay:4.4.4:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:40:*:*:*:*:*:*:*

More vulnerabilities in Broadcom Tcpreplay

CVE-2018-18408 — Critical (CVSS 9.8): A use-after-free was discovered in the tcpbridge binary of Tcpreplay 4.3.0 beta1. The issue gets triggered in the…
CVE-2020-12740 — Critical (CVSS 9.1): tcprewrite in Tcpreplay through 4.3.2 has a heap-based buffer over-read during a get_c operation. The issue is being…
CVE-2025-51006 — High (CVSS 7.8): Within tcpreplay's tcprewrite, a double free vulnerability has been identified in the dlt_linuxsll2_cleanup() function…
CVE-2022-37049 — High (CVSS 7.8): The component tcpprep in Tcpreplay v4.4.1 was discovered to contain a heap-based buffer overflow in parse_mpls at…
CVE-2022-37048 — High (CVSS 7.8): The component tcprewrite in Tcpreplay v4.4.1 was discovered to contain a heap-based buffer overflow in…
CVE-2022-37047 — High (CVSS 7.8): The component tcprewrite in Tcpreplay v4.4.1 was discovered to contain a heap-based buffer overflow in get_ipv6_next at…

All CVEs affecting Broadcom Tcpreplay →

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Browse all CWE-476 (NULL Pointer Dereference) vulnerabilities →