CVE-2026-129431
Ettercap through 0.8.5.1 Heap Out-of-Bounds Read via SOCKS5 Dissector
Ettercap through 0.8.5.1 contains a heap out-of-bounds read vulnerability in dissector_socks() in src/dissectors/ec_socks.c that allows network-adjacent attackers to read heap memory via unchecked SOCKS5 username/password lengths. Attackers can send a crafted SOCKS5 authentication packet observed by Ettercap to read up to 255 bytes past the heap buffer, disclosing memory printed and logged as captured credentials.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| ettercap Ettercap Ettercap/ettercap
github |
≥ 0; ≤ 0.8.5.1 (affected, custom)
Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 7.1 high |
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N | CNA: VulnCheck |
| 3.1 / 6.5 medium |
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N | CNA: VulnCheck |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/Ettercap/ettercap/pull/1340CNA: VulnCheck · issue-tracking, patch
- https://github.com/Ettercap/ettercap/blob/v0.8.5.1/src/dissectors/ec_socks.c#L108-L124CNA: VulnCheck · technical-description
- https://github.com/Ettercap/ettercapCNA: VulnCheck · product
- https://www.vulncheck.com/advisories/ettercap-through-0.8.5.1-heap-out-of-bounds-read-via-socks5-dissectorCNA: VulnCheck · third-party-advisory
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