CVE-2026-125402

high

Description

Ettercap through 0.8.4.1 contains a heap out-of-bounds read vulnerability in sslw_get_clienthello_sni() in src/ec_sslwrap.c that trusts the unchecked 16-bit SNI length field. Network-adjacent attackers can send crafted TLS ClientHello messages during SSL interception to leak up to 64 KB of heap memory upstream or crash Ettercap.

References

https://www.vulncheck.com/advisories/ettercap-through-0.8.4.1-heap-out-of-bounds-read-via-tls-sni-parsing

https://github.com/Ettercap/ettercap/security/advisories/GHSA-v48w-7cvh-c7f4

https://github.com/Ettercap/ettercap/pull/1330

https://github.com/Ettercap/ettercap/commit/1d8badb713579419a29a494bb463a1af59707e98

https://github.com/Ettercap/ettercap/blob/v0.8.4.1/src/ec_sslwrap.c#L589-L604

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-120565

Details

Source: Mitre, NVD

Published: 2026-11-10

Updated: 2026-11-10

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:A/AC:L/Au:N/C:C/I:N/A:C

Severity: High

CVSS v3

Base Score: 8.1

Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Severity: High

CVSS v4

Base Score: 7.2

Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N

Severity: High

EPSS

EPSS: 0.00251