Ettercap up to 0.8.5.1 Dissector ec_socks.c dissector_socks out-of-bounds

Summaryinfo

A vulnerability classified as problematic has been found in Ettercap up to 0.8.5.1. The affected element is the function dissector_socks of the file src/dissectors/ec_socks.c of the component Dissector. This manipulation causes out-of-bounds. This vulnerability appears as CVE-2026-129431. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in Ettercap up to 0.8.5.1. It has been declared as problematic. Affected by this vulnerability is the function dissector_socks of the file src/dissectors/ec_socks.c of the component Dissector. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-129431 since 11/14/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/14/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Packet Analyzer Software

Name

• Ettercap

Version

• 0.8.5.0
• 0.8.5.1

Website

• Product: https://github.com/Ettercap/ettercap/

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