tcpreplay tcpprep cidr.c mask_cidr6 heap-based overflow
Published Aug 15, 2025 · Updated Oct 23, 2026
Original summary
Normalized public record · Updated Oct 23, 2026
tcpreplay tcpprep cidr.c mask_cidr6 heap-based overflow
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
A vulnerability has been found in tcpreplay 4.5.1. This vulnerability affects the function mask_cidr6 of the file cidr.c of the component tcpprep. The manipulation leads to heap-based buffer overflow. The attack can be initiated remotely. The complexity of an attack is rather high. The exploitation appears to be difficult. The exploit has been disclosed to the public and may be used. The researcher is able to reproduce this with the latest official release 4.5.1 and the current master branch. The code maintainer cannot reproduce this for 4.5.2-beta1. In his reply the maintainer explains that "[i]n that case, this is a duplicate that was fixed in 4.5.2."
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- LOW
- Confidence
- Not available
- Aliases
- None reported
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
- VDB-320080 | tcpreplay tcpprep cidr.c mask_cidr6 heap-based overflow ↗
- VDB-320080 | CTI Indicators (IOB, IOC, IOA) ↗
- Submit #623635 | tcpreplay tcpprep tcpreplay version 6fcbf03 (the newest master in https://github.com/appneta/tcpreplay) Heap Buffer Overflow ↗
- Submit #623636 | tcpreplay tcpprep tcpreplay version 6fcbf03 (the newest master in https://github.com/appneta/tcpreplay) Heap Buffer Overflow (Duplicate) ↗
- Submit #623637 | tcpreplay tcpprep tcpreplay version 6fcbf03 (the newest master in https://github.com/appneta/tcpreplay) Heap Buffer Overflow (Duplicate) ↗
- Submit #623638 | tcpreplay tcpprep tcpreplay version 6fcbf03 (the newest master in https://github.com/appneta/tcpreplay) Heap Buffer Overflow (Duplicate) ↗
- Submit #623639 | tcpreplay tcpprep tcpreplay version 6fcbf03 (the newest master in https://github.com/appneta/tcpreplay) Heap Buffer Overflow (Duplicate) ↗
- Source repository ↗
- Source repository ↗
- drive.google.com ↗
- Source repository ↗
Record history
Published Aug 15, 2025 · Last refreshed Oct 23, 2026