Description
A vulnerability was detected in appneta tcpreplay up to 4.5.1. Impacted is the function tcpedit_post_args of the file /src/tcpedit/parse_args.c. The manipulation results in null pointer dereference. The attack is only possible with local access. The exploit is now public and may be used. Upgrading to version 4.5.2-beta2 is recommended to address this issue. Upgrading the affected component is advised. The vendor explains, that he was "[a]ble to reproduce in 6fcbf03 but not in 4.5.2-beta2".
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| appneta | tcpreplay | 4.5.0, 4.5.1 | 4.5.2-beta2 |
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-321217 | appneta tcpreplay parse_args.c tcpedit_post_args null pointer dereference vdb-entry technical-description
- VDB-321217 | CTI Indicators (IOB, IOC, IOA) signature permissions-required
- Submit #630496 | tcpreplay tcprewrite tcpreplay version 6fcbf03 (the newest master in https://github.com/appneta/tcpreplay) Null Pointer Dereference third-party-advisory
- https://github.com/appneta/tcpreplay/issues/971 issue-tracking
- https://github.com/appneta/tcpreplay/issues/971#issuecomment-3199014524 issue-tracking
- https://drive.google.com/file/d/1oVmsER6CXULLz_rnIyL410DJqO_hBtw_/view?usp=sharing exploit