National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2017-3819 Detail

Current Description

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.

Source:  MITRE
View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score: 8.8 HIGH
Vector:  CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://www.securityfocus.com/bid/96913 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1038050
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170315-asr Vendor Advisory

Weakness Enumeration

CWE-ID CWE Name Source
CWE-306 Missing Authentication for Critical Function NIST  
CWE-264 Permissions, Privileges, and Access Controls Cisco Systems, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:cisco:asr_5000_series_software:18.0.0:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cisco:asr_5000_series_software:18.0.0.57828:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cisco:asr_5000_series_software:18.0.0.59167:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cisco:asr_5000_series_software:18.0.0.59211:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cisco:asr_5000_series_software:18.0.l0.59219:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cisco:asr_5000_series_software:18.1.0:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cisco:asr_5000_series_software:18.1.0.59776:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cisco:asr_5000_series_software:18.1.0.59780:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cisco:asr_5000_series_software:18.1_base:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cisco:asr_5000_series_software:18.3.0:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cisco:asr_5000_series_software:18.3_base:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cisco:asr_5000_series_software:18.4.0:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cisco:asr_5000_series_software:19.0.1:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cisco:asr_5000_series_software:19.0.m0.60737:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cisco:asr_5000_series_software:19.0.m0.60828:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cisco:asr_5000_series_software:19.0.m0.61045:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cisco:asr_5000_series_software:19.1.0:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cisco:asr_5000_series_software:19.1.0.61559:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cisco:asr_5000_series_software:19.2.0:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cisco:asr_5000_series_software:19.3.0:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cisco:asr_5000_series_software:20.0.0:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cisco:virtualized_packet_core:v18.0_base:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cisco:virtualized_packet_core:v19.0_base:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cisco:virtualized_packet_core:v20.0_base:*:*:*:*:*:*:*
     Show Matching CPE(s)


Change History

5 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2017-3819
NVD Published Date:
03/15/2017
NVD Last Modified:
10/02/2019