Vulnerability DatabaseCVE-2026-125402
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CVE-2026-125402
Published:November 09, 2026
Updated:November 10, 2026
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.
Related Resources (6)
https://github.com/Ettercap/ettercap/blob/v0.8.4.1/src/ec_sslwrap.c#L589-L604
https://www.vulncheck.com/advisories/ettercap-through-0.8.4.1-heap-out-of-bounds-read-via-tls-sni-parsing
https://nvd.nist.gov/vuln/detail/CVE-2026-125402
https://github.com/Ettercap/ettercap/pull/1330
https://github.com/Ettercap/ettercap/security/advisories/GHSA-v48w-7cvh-c7f4
https://github.com/Ettercap/ettercap/commit/1d8badb713579419a29a494bb463a1af59707e98
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CVSS v4
Base Score:
7.2
Attack Vector
ADJACENT
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.1
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Out-of-bounds Read
CWE-125