Executive Summary

Summary
Title Ruby vulnerabilities
Informations
Name USN-4201-1 First vendor Publication 2019-11-26
Vendor Ubuntu Last vendor Modification 2019-11-26
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:L/I:L/A:N
Overall CVSS Score 6.5
Base Score 6.5 Environmental Score 6.5
impact SubScore 2.5 Temporal Score 6.5
Exploitabality Sub Score 3.9
 
Attack Vector Network Attack Complexity Low
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact Low
Integrity Impact Low 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:P/A:N)
Cvss Base Score 6.4 Attack Range Network
Cvss Impact Score 4.9 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 19.10 - Ubuntu 19.04 - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in Ruby.

Software Description: - ruby2.5: Interpreter of object-oriented scripting language Ruby - ruby2.3: Object-oriented scripting language

Details:

It was discovered that Ruby incorrectly handled certain files. An attacker could possibly use this issue to pass path matching what can lead to an unauthorized access. (CVE-2019-15845)

It was discovered that Ruby incorrectly handled certain regular expressions. An attacker could use this issue to cause a denial of service. (CVE-2019-16201)

It was discovered that Ruby incorrectly handled certain HTTP headers. An attacker could possibly use this issue to execute arbitrary code. (CVE-2019-16254)

It was discovered that Ruby incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code. (CVE-2019-16255)

Update instructions:

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

Ubuntu 19.10:
libruby2.5 2.5.5-4ubuntu2.1
ruby2.5 2.5.5-4ubuntu2.1

Ubuntu 19.04:
libruby2.5 2.5.5-1ubuntu1.1
ruby2.5 2.5.5-1ubuntu1.1

Ubuntu 18.04 LTS:
libruby2.5 2.5.1-1ubuntu1.6
ruby2.5 2.5.1-1ubuntu1.6

Ubuntu 16.04 LTS:
libruby2.3 2.3.1-2~ubuntu16.04.14
ruby2.3 2.3.1-2~ubuntu16.04.14

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

References:
https://usn.ubuntu.com/4201-1
CVE-2019-15845, CVE-2019-16201, CVE-2019-16254, CVE-2019-16255

Package Information:
https://launchpad.net/ubuntu/+source/ruby2.5/2.5.5-4ubuntu2.1
https://launchpad.net/ubuntu/+source/ruby2.5/2.5.5-1ubuntu1.1
https://launchpad.net/ubuntu/+source/ruby2.5/2.5.1-1ubuntu1.6
https://launchpad.net/ubuntu/+source/ruby2.3/2.3.1-2~ubuntu16.04.14

Original Source

Url : http://www.ubuntu.com/usn/USN-4201-1

CWE : Common Weakness Enumeration

% Id Name
33 % CWE-287 Improper Authentication
33 % CWE-94 Failure to Control Generation of Code ('Code Injection')
33 % CWE-74 Failure to Sanitize Data into a Different Plane ('Injection')

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 1050
Os 4
Os 1
Os 1

Alert History

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0
1
Date Informations
2020-05-23 13:03:46
  • Multiple Updates
2019-11-26 21:19:20
  • First insertion