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CVE-2021-27216

Published: 4 May 2021

Exim 4 before 4.94.2 has Execution with Unnecessary Privileges. By leveraging a delete_pid_file race condition, a local user can delete arbitrary files as root. This involves the -oP and -oPX options.

Priority

Medium

Cvss 3 Severity Score

6.3

Score breakdown

Status

Package Release Status
exim4
Launchpad, Ubuntu, Debian
jammy
Released (4.94-15ubuntu1.2)
impish
Released (4.94-15ubuntu1.2)
upstream Needs triage

bionic
Released (4.90.1-1ubuntu1.8)
focal
Released (4.93-13ubuntu1.5)
trusty
Released (4.82-3ubuntu2.4+esm3)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
xenial
Released (4.86.2-2ubuntu2.6+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
groovy
Released (4.94-7ubuntu1.2)
hirsute
Released (4.94-15ubuntu1.2)

Severity score breakdown

Parameter Value
Base score 6.3
Attack vector Local
Attack complexity High
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H