CVE-2020-28024

Exim 4 before 4.94.2 allows Buffer Underwrite that may result in unauthenticated remote attackers executing arbitrary commands, because smtp_ungetc was only intended to push back characters, but can actually push back non-character error codes such as EOF.

Affected products

Alt Linux, Astra Linux, Exim, Linuxmint, Suse, Ubuntu

Exim

< 4.94.2

Fix

Available

CVSS 3.1

9.8 CRITICAL

EPSS

4.2% (90th percentile)

Weakness

CWE-787

NVD status

Modified

Published

2021-05-06