Ettercap through 0.8.4.1 contains an out-of-bounds read and size_t underflow vulnerability in sslw_remove_sts() in src/ec_sslwrap.c, caused by a stale length and an unchecked memmem() result when stripping Strict-Transport-Security headers. A malicious HTTPS server whose response passes through Ettercap's SSL interception can trigger out-of-bounds reads and memory corruption in the Ettercap process, which normally runs as root.

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Ettercap ettercap unaffected
Version Status Constraints
0 affected ≤ 0.8.4.1

No data.

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Project Subscriptions

Vendors Products
Ettercap-project Subscribe
Ettercap Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/Ettercap/ettercap/blob/v0.8.4.1/src/ec_sslwrap.c#L1294-L1322 cve-icon cve-icon
https://github.com/Ettercap/ettercap/commit/1d8badb713579419a29a494bb463a1af59707e98 cve-icon cve-icon
https://github.com/Ettercap/ettercap/pull/1330 cve-icon cve-icon
https://github.com/Ettercap/ettercap/security/advisories/GHSA-hq2w-pg4m-6w63 cve-icon cve-icon
https://www.vulncheck.com/advisories/ettercap-through-0.8.4.1-out-of-bounds-read-via-sslw-remove-sts cve-icon cve-icon
History

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

Type Values Removed Values Added
Description Ettercap through 0.8.4.1 contains an out-of-bounds read and size_t underflow vulnerability in sslw_remove_sts() in src/ec_sslwrap.c, caused by a stale length and an unchecked memmem() result when stripping Strict-Transport-Security headers. A malicious HTTPS server whose response passes through Ettercap's SSL interception can trigger out-of-bounds reads and memory corruption in the Ettercap process, which normally runs as root.
Title Ettercap through 0.8.4.1 Out-of-Bounds Read via sslw_remove_sts
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:N/I:H/A:H'}

cvssV4_0

{'score': 7.2, 'vector': 'CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-11-09T23:28:04.934Z

Reserved: 2026-11-09T22:03:16.233Z

Link: CVE-2026-125403

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-10T00:17:14.860

Modified: 2026-11-10T00:17:14.860

Link: CVE-2026-125403

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses