RCE in Fehcom S\/qmail
CVE-2020-15955
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.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.009 (59.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 59.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
Weakness classification (CWE)
References
- www.fehcom.de/sqmail/sqmail.html (Patch, Release Notes, Vendor Advisory)
- nostarttls.secvuln.info/ (Technical Description, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-15955?
- CVE-2020-15955 is a medium-severity vulnerability in Fehcom S\/qmail, classified under Command Injection. CVSS score: 5.9/10. Published 2021-08-17.
- How severe is CVE-2020-15955?
- Medium severity. CVSS v3 base score is 5.9 out of 10.