CVE Vulnerabilities

CVE-2020-28021

Published: May 06, 2021 | Modified: May 10, 2021
CVSS 3.x
8.8
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
9 HIGH
AV:N/AC:L/Au:S/C:C/I:C/A:C
RedHat/V2
RedHat/V3
Ubuntu
MEDIUM

Exim 4 before 4.94.2 has Improper Neutralization of Line Delimiters. An authenticated remote SMTP client can insert newline characters into a spool file (which indirectly leads to remote code execution as root) via AUTH= in a MAIL FROM command.

Affected Software

Name Vendor Start Version End Version
Exim Exim 4.00 (including) 4.94.2 (excluding)
Exim4 Ubuntu bionic *
Exim4 Ubuntu devel *
Exim4 Ubuntu esm-infra/xenial *
Exim4 Ubuntu focal *
Exim4 Ubuntu groovy *
Exim4 Ubuntu hirsute *
Exim4 Ubuntu impish *
Exim4 Ubuntu jammy *
Exim4 Ubuntu trusty *
Exim4 Ubuntu trusty/esm *
Exim4 Ubuntu xenial *

References