Use After Free Vulnerability in tcpreplay by Appneta
CVE-2025-9385

4.8MEDIUM

Key Information:

Vendor

Appneta

Status
Tcpreplay
Vendor
CVE Published:
24 August 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-9385?

A flaw has been identified in Appneta's tcpreplay tool, specifically within the fix_ipv6_checksums function located in edit_packet.c of the tcprewrite component. This vulnerability allows for a use after free attack that is initiated through local execution. Exploits for this vulnerability have been publicly published, prompting urgent patching. Users are advised to upgrade to version 4.5.2-beta3 or later to mitigate potential risks associated with this critical flaw.

Affected Version(s)

tcpreplay 4.5.0

tcpreplay 4.5.1

tcpreplay 4.5.2-beta3

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-9385 - Proof of Concept

References

https://vuldb.com/?id.321218
vdb-entrytechnical-description
https://vuldb.com/?ctiid.321218
signaturepermissions-required
https://vuldb.com/?submit.630497
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

HeureuxBuilding (VulDB User)
.
CVE-2025-9385 : Use After Free Vulnerability in tcpreplay by Appneta