N/A - USN-4075-1

Executive Summary

Summary
Title	Exim vulnerability

Informations
Name	USN-4075-1	First vendor Publication	2019-07-25
Vendor	Ubuntu	Last vendor Modification	2019-07-25
Severity (Vendor)	N/A	Revision	N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score	NA
Base Score	NA	Environmental Score	NA
impact SubScore	NA	Temporal Score	NA
Exploitabality Sub Score	NA

Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score	N/A	Attack Range	N/A
Cvss Impact Score	N/A	Attack Complexity	N/A
Cvss Expoit Score	N/A	Authentication	N/A
Calculate full CVSS 2.0 Vectors scores

Detail

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

- Ubuntu 19.04 - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS

Summary:

Exim could be made to run programs as an administrator if it received specially crafted network traffic.

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

Details:

Jeremy Harris discovered that Exim incorrectly handled sort expansions. In environments where sort expansions are used, a remote attacker could possibly use this issue to execute arbitrary code as root.

Update instructions:

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

Ubuntu 19.04:
exim4-daemon-heavy 4.92-4ubuntu1.2
exim4-daemon-light 4.92-4ubuntu1.2

Ubuntu 18.04 LTS:
exim4-daemon-heavy 4.90.1-1ubuntu1.3
exim4-daemon-light 4.90.1-1ubuntu1.3

Ubuntu 16.04 LTS:
exim4-daemon-heavy 4.86.2-2ubuntu2.4
exim4-daemon-light 4.86.2-2ubuntu2.4

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

References:
https://usn.ubuntu.com/4075-1
CVE-2019-13917

Package Information:
https://launchpad.net/ubuntu/+source/exim4/4.92-4ubuntu1.2
https://launchpad.net/ubuntu/+source/exim4/4.90.1-1ubuntu1.3
https://launchpad.net/ubuntu/+source/exim4/4.86.2-2ubuntu2.4