Executive Summary

Title Exim vulnerability
Name USN-4366-1 First vendor Publication 2020-05-19
Vendor Ubuntu Last vendor Modification 2020-05-19
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Overall CVSS Score 7.5
Base Score 7.5 Environmental Score 7.5
impact SubScore 3.6 Temporal Score 7.5
Exploitabality Sub Score 3.9
Attack Vector Network Attack Complexity Low
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact None Availability Impact None
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:P/I:N/A:N)
Cvss Base Score 5 Attack Range Network
Cvss Impact Score 2.9 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores


A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS - Ubuntu 19.10 - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS - Ubuntu 14.04 ESM


Exim could be made to access sensitive information or bypass authentication if it received a specially crafted input.

Software Description: - exim4: Exim is a mail transport agent


It was discovered that Exim incorrectly handled certain inputs. An remote attacker could possibly use this issue to access sensitive information or authentication bypass.

Update instructions:

The problem can be corrected by updating your system to the following package versions:

Ubuntu 20.04 LTS:
exim4-base 4.93-13ubuntu1.1
exim4-daemon-heavy 4.93-13ubuntu1.1
exim4-daemon-light 4.93-13ubuntu1.1

Ubuntu 19.10:
exim4-base 4.92.1-1ubuntu3.1
exim4-daemon-heavy 4.92.1-1ubuntu3.1
exim4-daemon-light 4.92.1-1ubuntu3.1

Ubuntu 18.04 LTS:
exim4-base 4.90.1-1ubuntu1.5
exim4-daemon-heavy 4.90.1-1ubuntu1.5
exim4-daemon-light 4.90.1-1ubuntu1.5

Ubuntu 16.04 LTS:
exim4-base 4.86.2-2ubuntu2.6
exim4-daemon-heavy 4.86.2-2ubuntu2.6
exim4-daemon-light 4.86.2-2ubuntu2.6

Ubuntu 14.04 ESM:
exim4-base 4.82-3ubuntu2.4+esm2
exim4-daemon-heavy 4.82-3ubuntu2.4+esm2
exim4-daemon-light 4.82-3ubuntu2.4+esm2

In general, a standard system update will make all the necessary changes.


Package Information:

Original Source

Url : http://www.ubuntu.com/usn/USN-4366-1

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-125 Out-of-bounds Read

CPE : Common Platform Enumeration

Application 140

Alert History

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Date Informations
2020-05-23 13:03:46
  • Multiple Updates
2020-05-19 17:18:50
  • First insertion