Executive Summary

This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Title Rack vulnerability
Name USN-4089-1 First vendor Publication 2019-08-07
Vendor Ubuntu Last vendor Modification 2019-08-07
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:M/Au:N/C:N/I:P/A:N)
Cvss Base Score 4.3 Attack Range Network
Cvss Impact Score 2.9 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores


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

- Ubuntu 18.04 LTS - Ubuntu 16.04 LTS


Rack could allow cross-site scripting (XSS) attacks.

Software Description: - ruby-rack: modular Ruby webserver interface


It was discovered that Rack incorrectly handled carefully crafted requests. A remote attacker could use this issue to execute a cross-site scripting (XSS) attack.

Update instructions:

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

Ubuntu 18.04 LTS:
ruby-rack 1.6.4-4ubuntu0.1

Ubuntu 16.04 LTS:
ruby-rack 1.6.4-3ubuntu0.1

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


Package Information:

Original Source

Url : http://www.ubuntu.com/usn/USN-4089-1

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-79 Failure to Preserve Web Page Structure ('Cross-site Scripting') (CWE/SANS Top 25)

CPE : Common Platform Enumeration

Application 44
Os 1

Nessus® Vulnerability Scanner

Date Description
2019-01-03 Name : The remote Fedora host is missing a security update.
File : fedora_2018-02e965a729.nasl - Type : ACT_GATHER_INFO
2019-01-03 Name : The remote Fedora host is missing a security update.
File : fedora_2018-e8ff8b7f8e.nasl - Type : ACT_GATHER_INFO
2018-11-28 Name : The remote Fedora host is missing a security update.
File : fedora_2018-5743ef02a1.nasl - Type : ACT_GATHER_INFO
2018-11-23 Name : The remote Debian host is missing a security update.
File : debian_DLA-1585.nasl - Type : ACT_GATHER_INFO

Alert History

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Date Informations
2019-08-07 21:19:23
  • First insertion