Detections
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Alpine: opensmtpd-extras: security update to 6.6.4-r0

critical Tenable Self-Hosted Container Security Plugin ID 427041

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - OpenSMTPD before 6.6.4 allows remote code execution because of an out-of-bounds read in mta_io in
 mta_session.c for multi-line replies. Although this vulnerability affects the client side of OpenSMTPD, it
 is possible to attack a server because the server code launches the client code during bounce handling.
 (CVE-2020-8794)

See Also

https://security.alpinelinux.org/vuln/CVE-2020-8794

Plugin Details

Severity: Critical

ID: 427041

Version: Revision 1.2

Type: Local

Published: 5/16/2025

Updated: 7/2/2026

Supported Sensors: Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

Percentile: 97.36

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 8.3

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2020-8794

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 2/24/2020

Exploitable With

Metasploit (OpenSMTPD OOB Read Local Privilege Escalation)

Reference Information

CVE: CVE-2020-8794