Description
A vulnerability has been found in appneta tcpreplay up to 4.5.1. The impacted element is the function get_l2len_protocol of the file get.c of the component tcprewrite. Such manipulation leads to use after free. The attack must be carried out locally. The exploit has been disclosed to the public and may be used. Upgrading to version 4.5.2-beta3 is sufficient to resolve this issue. You should upgrade the affected component.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| appneta | tcpreplay | 4.5.0, 4.5.1 | 4.5.2-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-321219 | appneta tcpreplay tcprewrite get.c get_l2len_protocol use after free vdb-entry technical-description
- VDB-321219 | CTI Indicators (IOB, IOC, IOA) signature permissions-required
- Submit #630498 | tcpreplay tcprewrite tcpreplay version 6fcbf03 (the newest master in https://github.com/appneta/tcpreplay) Use-After-Free third-party-advisory
- https://github.com/appneta/tcpreplay/issues/973 issue-tracking
- https://drive.google.com/file/d/1DcQWaTmj1HSbRidOCWwe9vtgHsBnFuX7/view?usp=sharing exploit