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CVE-2020-28022

Published: 4 May 2021

Exim 4 before 4.94.2 has Improper Restriction of Write Operations within the Bounds of a Memory Buffer. This occurs when processing name=value pairs within MAIL FROM and RCPT TO commands.

Priority

Medium

Cvss 3 Severity Score

9.8

Score breakdown

Status

Package Release Status
exim4
Launchpad, Ubuntu, Debian
groovy
Released (4.94-7ubuntu1.2)
hirsute
Released (4.94-15ubuntu1.2)
impish
Released (4.94-15ubuntu1.2)
jammy
Released (4.94-15ubuntu1.2)
trusty
Released (4.82-3ubuntu2.4+esm3)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream Needs triage

xenial
Released (4.86.2-2ubuntu2.6+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
bionic
Released (4.90.1-1ubuntu1.8)
focal
Released (4.93-13ubuntu1.5)

Severity score breakdown

Parameter Value
Base score 9.8
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H