CVE-2020-28021

Public on 2021-05-06
Modified on 2021-05-07
Description
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.
Severity
Important
CVSS v3 Base Score
8.8
See breakdown

Affected Packages

Platform Package Release Date Advisory
Amazon Linux 1 exim 2021-05-06 19:11 ALAS-2021-1497

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv2 9.0 AV:N/AC:L/Au:S/C:C/I:C/A:C
Amazon Linux CVSSv3 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD CVSSv2 9.0 AV:N/AC:L/Au:S/C:C/I:C/A:C
NVD CVSSv3 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H