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Joined: 12 May 2004
Posts: 2658

PostPosted: Tue May 04, 2021 8:26 pm    Post subject: [ GLSA 202105-01 ] Exim Reply with quote

Gentoo Linux Security Advisory

Title: Exim: Multiple vulnerabilities (GLSA 202105-01)
Severity: high
Exploitable: local, remote
Date: 2021-05-04
Bug(s): #786945
ID: 202105-01

Synopsis

Multiple vulnerabilities have been found in Exim, the worst of
which allows remote attackers to execute arbitrary code.


Background

Exim is a message transfer agent (MTA) designed to be a a highly
configurable, drop-in replacement for sendmail.


Affected Packages

Package: mail-mta/exim
Vulnerable: < 4.94.2
Unaffected: >= 4.94.2
Architectures: All supported architectures


Description

Multiple vulnerabilities have been discovered in Exim. Please review the
CVE identifiers referenced below for details.


Impact

A remote attacker, by connecting to the SMTP listener daemon, could
possibly execute arbitrary code with the privileges of the process or
cause a Denial of Service condition. Furthermore, a local attacker could
perform symlink attacks to overwrite arbitrary files with the privileges
of the user running the application or escalate privileges.


Workaround

There is no known workaround at this time.

Resolution

All Exim users should upgrade to the latest version:
Code:
# emerge --sync
      # emerge --ask --oneshot --verbose ">=mail-mta/exim-4.94.2"
   


References

CVE-2020-28007
CVE-2020-28008
CVE-2020-28009
CVE-2020-28010
CVE-2020-28011
CVE-2020-28012
CVE-2020-28013
CVE-2020-28014
CVE-2020-28015
CVE-2020-28016
CVE-2020-28017
CVE-2020-28018
CVE-2020-28019
CVE-2020-28020
CVE-2020-28021
CVE-2020-28022
CVE-2020-28023
CVE-2020-28024
CVE-2020-28025
CVE-2020-28026
CVE-2021-27216
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