CVE-2020-15955

low-risk
Published 2021-08-17

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.

Do I need to act?

-
0.32% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.9/10 Medium
NETWORK / HIGH complexity

Affected Products (1)

S\/Qmail

Affected Vendors

Fehcom

References (4)

Technical Description https://nostarttls.secvuln.info/
Patch https://www.fehcom.de/sqmail/sqmail.html
Technical Description https://nostarttls.secvuln.info/
Patch https://www.fehcom.de/sqmail/sqmail.html
24
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 1/34 · Minimal
Exposure 5/34 · Minimal