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."
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| appneta | tcpreplay | 4.5.1 | 4.5.3-beta3 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | tcpreplay | 4.5.2-1 | — |
| Debian 13 | tcpreplay | No fix yet | — |
| Debian 12 | tcpreplay | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | tcpreplay | No fix yet | — |
| Ubuntu 26.04 LTS | tcpreplay | No fix yet | — |
| Ubuntu 25.10 | tcpreplay | No fix yet | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | tcpreplay | No fix yet | — |
| Ubuntu Pro 22.04 LTS | tcpreplay | No fix yet | — |
| Ubuntu Pro 20.04 LTS | tcpreplay | No fix yet | — |
| Ubuntu Pro 18.04 LTS | tcpreplay | No fix yet | — |
| Ubuntu Pro 16.04 LTS | tcpreplay | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | tcpreplay | 4.5.2-bp160.1.1 | openSUSE-SU-2025:20119-1 |
Advisories 1
- openSUSE-SU-2025:20119-1 Security update for tcpreplay SUSE / openSUSE Security Updates · Mar 23, 2026
References
- VDB-321855 | appneta tcpreplay send_packets.c calc_sleep_time divide by zero vdb-entry technical-description
- VDB-321855 | CTI Indicators (IOB, IOC, IOA) signature permissions-required
- Submit #630493 | tcpreplay tcpreplay version 6fcbf03 (the newest master in https://github.com/appneta/tcpreplay) floating-point exception third-party-advisory
- Submit #630494 | tcpreplay tcpreplay version 6fcbf03 (the newest master in https://github.com/appneta/tcpreplay) floating-point exception (Duplicate) third-party-advisory
- https://github.com/appneta/tcpreplay/issues/968 issue-tracking
- https://github.com/appneta/tcpreplay/issues/968#issuecomment-3226338070 issue-tracking
- https://drive.google.com/file/d/16QQtZvUrMbF-i_1cGt5hNWmkn-YVyBOM/view?usp=sharing exploit