Executive Summary

Summary
Title Exim vulnerability
Informations
Name USN-4124-1 First vendor Publication 2019-09-06
Vendor Ubuntu Last vendor Modification 2019-09-06
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 : (AV:N/AC:L/Au:N/C:C/I:C/A:C)
Cvss Base Score 10 Attack Range Network
Cvss Impact Score 10 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
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:

It was discovered that Exim incorrectly handled certain decoding operations. A remote attacker could possibly use this issue to execute arbitrary commands.

Update instructions:

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

Ubuntu 19.04:
exim4-daemon-heavy 4.92-4ubuntu1.3
exim4-daemon-light 4.92-4ubuntu1.3

Ubuntu 18.04 LTS:
exim4-daemon-heavy 4.90.1-1ubuntu1.4
exim4-daemon-light 4.90.1-1ubuntu1.4

Ubuntu 16.04 LTS:
exim4-daemon-heavy 4.86.2-2ubuntu2.5
exim4-daemon-light 4.86.2-2ubuntu2.5

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

References:
https://usn.ubuntu.com/4124-1
CVE-2019-15846, https://launchpad.net/bugs/1843041

Package Information:
https://launchpad.net/ubuntu/+source/exim4/4.92-4ubuntu1.3
https://launchpad.net/ubuntu/+source/exim4/4.90.1-1ubuntu1.4
https://launchpad.net/ubuntu/+source/exim4/4.86.2-2ubuntu2.5

Original Source

Url : http://www.ubuntu.com/usn/USN-4124-1

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 139
Os 3

Snort® IPS/IDS

Date Description
2020-04-02 Exim unauthenticated remote code execution attempt
RuleID : 53378 - Revision : 1 - Type : SERVER-OTHER
2020-04-02 Exim unauthenticated remote code execution attempt
RuleID : 53377 - Revision : 1 - Type : SERVER-OTHER
2020-04-02 Exim unauthenticated remote code execution attempt
RuleID : 53376 - Revision : 1 - Type : SERVER-OTHER

Alert History

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0
1
2
3
Date Informations
2019-09-17 12:14:08
  • Multiple Updates
2019-09-06 21:22:29
  • Multiple Updates
2019-09-06 17:22:17
  • Multiple Updates
2019-09-06 17:19:00
  • First insertion