Executive Summary

Summary
Title rssh vulnerabilities
Informations
Name USN-3946-1 First vendor Publication 2019-04-11
Vendor Ubuntu Last vendor Modification 2019-04-11
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:P/I:P/A:P)
Cvss Base Score 7.5 Attack Range Network
Cvss Impact Score 6.4 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 18.10 - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS - Ubuntu 14.04 LTS

Summary:

rssh could be made to run arbitrary commands if it received specially crafted input.

Software Description: - rssh: Restricted shell allowing scp, sftp, cvs, svn, rsync or rdist

Details:

It was discovered that rssh incorrectly handled certain command-line arguments and environment variables. An authenticated user could bypass rssh's command restrictions, allowing an attacker to run arbitrary commands.

Update instructions:

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

Ubuntu 18.10:
rssh 2.3.4-8ubuntu0.2

Ubuntu 18.04 LTS:
rssh 2.3.4-7ubuntu0.1

Ubuntu 16.04 LTS:
rssh 2.3.4-4+deb8u2ubuntu0.16.04.2

Ubuntu 14.04 LTS:
rssh 2.3.4-4+deb8u2ubuntu0.14.04.2

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

References:
https://usn.ubuntu.com/usn/usn-3946-1
CVE-2019-1000018, CVE-2019-3463, CVE-2019-3464

Package Information:
https://launchpad.net/ubuntu/+source/rssh/2.3.4-8ubuntu0.2
https://launchpad.net/ubuntu/+source/rssh/2.3.4-7ubuntu0.1
https://launchpad.net/ubuntu/+source/rssh/2.3.4-4+deb8u2ubuntu0.16.04.2
https://launchpad.net/ubuntu/+source/rssh/2.3.4-4+deb8u2ubuntu0.14.04.2

Original Source

Url : http://www.ubuntu.com/usn/USN-3946-1

CWE : Common Weakness Enumeration

% Id Name
33 % CWE-665 Improper Initialization
33 % CWE-88 Argument Injection or Modification
33 % CWE-77 Improper Sanitization of Special Elements used in a Command ('Command Injection')

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 1
Os 4
Os 2
Os 3

Alert History

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0
Date Informations
2019-04-12 00:18:40
  • First insertion