CVE-2020-15955

MEDIUM

fehcom s/qmail < 4.0.07 - Command Injection via STARTTLS MitM

Title source: llm
STIX 2.1

Description

In s/qmail through 4.0.07, an active MitM can inject arbitrary plaintext commands into a STARTTLS encrypted session between an SMTP client and s/qmail. This allows e-mail messages and user credentials to be sent to the MitM attacker.

References (2)

Core 2
Core References
Patch, Release Notes, Vendor Advisory x_refsource_misc
https://www.fehcom.de/sqmail/sqmail.html
Technical Description, Third Party Advisory x_refsource_misc
https://nostarttls.secvuln.info/

Scores

CVSS v3 5.9
EPSS 0.0095
EPSS Percentile 56.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Details

CWE
CWE-77
Status published
Products (1)
fehcom/s\/qmail < 4.0.07
Published Aug 17, 2021
Tracked Since Feb 18, 2026