Description
An issue was discovered in Tcpreplay 4.3.0 beta1. A heap-based buffer over-read was triggered in the function dlt_en10mb_encode() of the file plugins/dlt_en10mb/en10mb.c, due to inappropriate values in the function memmove(). The length (pktlen + ctx -> l2len) can be larger than source value (packet + ctx->l2len) because the function fails to ensure the length of a packet is valid. This leads to Denial of Service.
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 | 4.3.1-1 | — |
| Debian 13 | tcpreplay | 4.3.1-1 | — |
| Debian 12 | tcpreplay | 4.3.1-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 22.04 LTS | tcpreplay | 4.3.4-1ubuntu0.1~esm1 | USN-5205-1 |
| Ubuntu Pro 20.04 LTS | tcpreplay | 4.3.2-1ubuntu0.1~esm2 | USN-5205-1 |
| Ubuntu Pro 18.04 LTS | tcpreplay | 4.2.6-1ubuntu0.1~esm1 | USN-5205-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | tcpreplay | 3.4.4-2+deb8u1ubuntu0.1~esm1 | USN-5205-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | tcpreplay | 4.3.4-1.3 | openSUSE-SU-2024:11426-1 |
Advisories 2
- USN-5205-1 tcpreplay vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- openSUSE-SU-2024:11426-1 tcpreplay-4.3.4-1.3 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026