Executive Summary



This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Informations
Name CVE-2017-3819 First vendor Publication 2017-03-15
Vendor Cve Last vendor Modification 2019-10-03

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Overall CVSS Score 8.8
Base Score 8.8 Environmental Score 8.8
impact SubScore 5.9 Temporal Score 8.8
Exploitabality Sub Score 2.8
 
Attack Vector Network Attack Complexity Low
Privileges Required Low User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact High Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:S/C:C/I:C/A:C)
Cvss Base Score 9 Attack Range Network
Cvss Impact Score 10 Attack Complexity Low
Cvss Expoit Score 8 Authentication Requires single instance
Calculate full CVSS 2.0 Vectors scores

Detail

A privilege escalation vulnerability in the Secure Shell (SSH) subsystem in the StarOS operating system for Cisco ASR 5000 Series, ASR 5500 Series, ASR 5700 Series devices, and Cisco Virtualized Packet Core could allow an authenticated, remote attacker to gain unrestricted, root shell access. The vulnerability is due to missing input validation of parameters passed during SSH or SFTP login. An attacker could exploit this vulnerability by providing crafted user input to the SSH or SFTP command-line interface (CLI) during SSH or SFTP login. An exploit could allow an authenticated attacker to gain root privileges access on the router. Note: Only traffic directed to the affected system can be used to exploit this vulnerability. This vulnerability can be triggered via both IPv4 and IPv6 traffic. An established TCP connection toward port 22, the SSH default port, is needed to perform the attack. The attacker must have valid credentials to login to the system via SSH or SFTP. The following products have been confirmed to be vulnerable: Cisco ASR 5000/5500/5700 Series devices running StarOS after 17.7.0 and prior to 18.7.4, 19.5, and 20.2.3 with SSH configured are vulnerable. Cisco Virtualized Packet Core - Single Instance (VPC-SI) and Distributed Instance (VPC-DI) devices running StarOS prior to N4.2.7 (19.3.v7) and N4.7 (20.2.v0) with SSH configured are vulnerable. Cisco Bug IDs: CSCva65853.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-3819

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-306 Missing Authentication for Critical Function (CWE/SANS Top 25)

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 21
Application 3

Nessus® Vulnerability Scanner

Date Description
2017-04-10 Name : The remote device is affected by a privilege escalation vulnerability.
File : cisco-sa-20170315-asr.nasl - Type : ACT_GATHER_INFO

Sources (Detail)

Source Url
BID http://www.securityfocus.com/bid/96913
CONFIRM https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-s...
SECTRACK http://www.securitytracker.com/id/1038050

Alert History

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Date Informations
2021-05-04 13:01:49
  • Multiple Updates
2021-04-22 02:15:09
  • Multiple Updates
2020-05-23 01:00:31
  • Multiple Updates
2019-10-03 09:20:23
  • Multiple Updates
2017-07-12 09:22:56
  • Multiple Updates
2017-04-11 13:20:40
  • Multiple Updates
2017-03-30 21:23:11
  • Multiple Updates
2017-03-17 09:24:13
  • Multiple Updates
2017-03-16 00:19:36
  • First insertion