CVE-2025-51005Public exploit

Crash via unchecked IPv4 packet length

Published Sep 23, 2025 · Updated Sep 23, 2025

Heap-based buffer overflow in AppNeta Tcpreplay 4.5.1 allows local users to crash tcpliveplay with a crafted pcap file. In tcpliveplay.c, do_checksum_math_liveplay trusts a remaining length derived from the IPv4 header and reads two bytes past a libpcap-allocated heap buffer during TCP checksum calculation. The user must run tcpliveplay against the malicious capture on a live network interface; the demonstrated consequence is process abort and service interruption, not data disclosure or modification.

CVSS severity7.5
High
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in AppNeta Tcpreplay 4.5.1 allows local users to crash tcpliveplay with a crafted pcap file. In tcpliveplay.c, do_checksum_math_liveplay trusts a remaining length derived from the IPv4 header and reads two bytes past a libpcap-allocated heap buffer during TCP checksum calculation. The user must run tcpliveplay against the malicious capture on a live network interface; the demonstrated consequence is process abort and service interruption, not data disclosure or modification.

The record

CVE
CVE-2025-51005
Published
Sep 23, 2025
Updated
Sep 23, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-122
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 23, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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