CVE-2026-129432

Ettercap through 0.8.5.1 Heap Out-of-Bounds Read in NFS mountd Dissector

Published Nov 14, 2026 CVSS 4.0 · 7.1 High EPSS n/a KEV · Not listed

Description

Ettercap through 0.8.5.1 contains a heap out-of-bounds read vulnerability in dissector_mountd() in src/dissectors/ec_mountd.c that validates RPC credential and directory lengths independently rather than against the packet end. Network-adjacent attackers can send a crafted MOUNT MNT call to read up to 100 bytes past the heap buffer, leaking memory to the console and logs.

Analysis

Technical impact

Ettercap up to version 0.8.5.1 contains a heap out-of-bounds read in the NFS mountd dissector. The flaw allows a crafted RPC MOUNT request to validate RPC credential and directory lengths independently, so a malicious packet can read up to 100 bytes beyond the allocated heap buffer. The leaked data is printed to the console and written to log files, exposing sensitive memory contents to anyone with read access to those outputs.

Affected Systems

This vulnerability affects the Ettercap packet‑sniffing tool, specifically versions 0.8.5.1 and earlier. Any system running these affected releases of Ettercap that has enabled the NFS mountd dissector is potentially exposed.

Risk and Exploitability

The CVSS score is 7.1, indicating a high severity. No EPSS score is available. The vulnerability is not listed in the CISA KEV catalog. Network‑adjacent attackers can exploit it by sending a crafted MOUNT MNT call over a local network segment. If the attacker succeeds, they can read memory from the Ettercap process, compromising confidentiality of data exposed in console output or logs. The exploitation requires network proximity and the target to be actively capturing NFS traffic with the mountd dissector enabled.

Affected Products

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	≤ 0.8.5.1

No data.

Vendor Product Versions

Ettercap-project

Ettercap

Version	Status	Scheme	Platform
`[0,0.8.5.1]`	affected	generic	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Upgrade Ettercap to a patched version (e.g., 0.8.6 or later) once the fix is released.
If an upgrade is not immediately possible, disable the NFS mountd dissector in Ettercap’s configuration to prevent the heap read.
After applying an upgrade or disabling the dissector, monitor console and log files for any unexpected memory output and adjust logging level to reduce exposure.

Generated by OpenCVE AI on November 14, 2026 at 20:25 UTC.

Tracking

Advisories

No advisories available

Metrics

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

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 High

Integrity Impact None

Availability Impact None

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.

References

Link	Providers
https://github.com/Ettercap/ettercap
https://github.com/Ettercap/ettercap/blob/v0.8.5.1/src/dissectors/ec_mountd.c#L88-L103
https://github.com/Ettercap/ettercap/pull/1341
https://www.vulncheck.com/advisories/ettercap-through-0.8.5.1-heap-out-of-bounds-read-in-nfs-mountd-dissector

History

Nov 14, 2026 12:45 PM Description updated. Title updated. First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		Ettercap through 0.8.5.1 contains a heap out-of-bounds read vulnerability in dissector_mountd() in src/dissectors/ec_mountd.c that validates RPC credential and directory lengths independently rather than against the packet end. Network-adjacent attackers can send a crafted MOUNT MNT call to read up to 100 bytes past the heap buffer, leaking memory to the console and logs.
Title		Ettercap through 0.8.5.1 Heap Out-of-Bounds Read in NFS mountd Dissector
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		https://github.com/Ettercap/ettercap https://github.com/Ettercap/ettercap/blob/v0.8.5.1/src/dissectors/ec_mountd.c#L88-L103 https://github.com/Ettercap/ettercap/pull/1341 https://www.vulncheck.com/advisories/ettercap-through-0.8.5.1-heap-out-of-bounds-read-in-nfs-mountd-dissector
Metrics		cvssV3_1 `{'score': 6.5, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}` cvssV4_0 `{'score': 7.1, 'vector': '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'}`