# CVE-2025-9649: appneta tcpreplay send_packets.c calc_sleep_time divide by zero

> A local attacker can cause a denial of service in tcpreplay via a divide-by-zero error in the packet sending logic.

- **Severity:** Medium 4.8 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 29 Aug 2025
- **Updated:** 29 Aug 2025
- **Also known as:** DEBIAN-CVE-2025-9649, GHSA-cgx8-mh65-hcp4, UBUNTU-CVE-2025-9649

## What is CVE-2025-9649?

CVE-2025-9649 is a medium-severity denial of service vulnerability in Broadcom Tcpreplay, published on 29 Aug 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A security vulnerability has been detected in appneta tcpreplay 4.5.1. Impacted is the function calc_sleep_time of the file send_packets.c. Such manipulation leads to divide by zero. An attack has to be approached locally. The exploit has been disclosed publicly and may be used. Upgrading to version 4.5.3-beta3 is recommended to address this issue. It is advisable to upgrade the affected component. The vendor confirms in a GitHub issue reply: "Was able to reproduce in 6fcbf03 but NOT 4.5.3-beta3."

Weakness: CWE-404 (Improper Resource Shutdown or Release), CWE-369 (Divide By Zero)

## Which versions are affected by CVE-2025-9649?

It affects 1 product.


Products: Broadcom Tcpreplay.

## How do I fix CVE-2025-9649?

Upgrade to a fixed version.

## Is CVE-2025-9649 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-9649 exists.

## Other vulnerabilities in Broadcom Tcpreplay

- [CVE-2018-18408](https://insights.sbomify.com/CVE-2018-18408/): Use after free in n/a (critical 9.8)
- [CVE-2020-12740](https://insights.sbomify.com/CVE-2020-12740/): Memory corruption in n/a (critical 9.1)
- [CVE-2025-51006](https://insights.sbomify.com/CVE-2025-51006/): Use after free in n/a (high 7.8)
- [CVE-2022-37047](https://insights.sbomify.com/CVE-2022-37047/): Memory corruption in n/a (high 7.8)
- [CVE-2022-37048](https://insights.sbomify.com/CVE-2022-37048/): Memory corruption in n/a (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-9649 and fix it if it is affected.

What it is: CVE-2025-9649 is a medium-severity denial of service vulnerability in Broadcom Tcpreplay, published on 29 Aug 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-9649 exists.

Affected product: Broadcom Tcpreplay. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-9649/ (Markdown: https://insights.sbomify.com/CVE-2025-9649/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-9649
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-9649
- OSV: https://osv.dev/vulnerability/CVE-2025-9649

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-9649/
Summaries are generated and may contain mistakes; the official description above is the record.