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.
Advisories

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Fixes

Solution

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Workaround

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History

Mon, 09 Nov 2026 23:45:00 +0000

Type Values Removed Values Added
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.
Title Ettercap through 0.8.4.1 Heap Out-of-Bounds Read via TLS SNI Parsing
First Time appeared Ettercap-project
Ettercap-project ettercap
Weaknesses CWE-125
CPEs cpe:2.3:a:ettercap-project:ettercap:*:*:*:*:*:*:*:*
Vendors & Products Ettercap-project
Ettercap-project ettercap
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H'}

cvssV4_0

{'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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-11-09T23:28:04.231Z

Reserved: 2026-11-09T22:03:15.846Z

Link: CVE-2026-125402

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-10T00:17:14.703

Modified: 2026-11-10T00:17:14.703

Link: CVE-2026-125402

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses