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Vulnerability Details : CVE-2017-3819

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.
Publish Date : 2017-03-15 Last Update Date : 2019-10-02
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- CVSS Scores & Vulnerability Types

CVSS Score
9.0
Confidentiality Impact Complete (There is total information disclosure, resulting in all system files being revealed.)
Integrity Impact Complete (There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the entire system being compromised.)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Single system (The vulnerability requires an attacker to be logged into the system (such as at a command line or via a desktop session or web interface).)
Gained Access None
Vulnerability Type(s) Gain privileges
CWE ID 306

- Products Affected By CVE-2017-3819

# Product Type Vendor Product Version Update Edition Language
1 Application Cisco Asr 5000 Series Software 18.0.0 Version Details Vulnerabilities
2 Application Cisco Asr 5000 Series Software 18.0.0.57828 Version Details Vulnerabilities
3 Application Cisco Asr 5000 Series Software 18.0.0.59167 Version Details Vulnerabilities
4 Application Cisco Asr 5000 Series Software 18.0.0.59211 Version Details Vulnerabilities
5 Application Cisco Asr 5000 Series Software 18.0.l0.59219 Version Details Vulnerabilities
6 Application Cisco Asr 5000 Series Software 18.1 Base Version Details Vulnerabilities
7 Application Cisco Asr 5000 Series Software 18.1.0 Version Details Vulnerabilities
8 Application Cisco Asr 5000 Series Software 18.1.0.59776 Version Details Vulnerabilities
9 Application Cisco Asr 5000 Series Software 18.1.0.59780 Version Details Vulnerabilities
10 Application Cisco Asr 5000 Series Software 18.3 Base Version Details Vulnerabilities
11 Application Cisco Asr 5000 Series Software 18.3.0 Version Details Vulnerabilities
12 Application Cisco Asr 5000 Series Software 18.4.0 Version Details Vulnerabilities
13 Application Cisco Asr 5000 Series Software 19.0.m0.60737 Version Details Vulnerabilities
14 Application Cisco Asr 5000 Series Software 19.0.m0.60828 Version Details Vulnerabilities
15 Application Cisco Asr 5000 Series Software 19.0.m0.61045 Version Details Vulnerabilities
16 Application Cisco Asr 5000 Series Software 19.0.1 Version Details Vulnerabilities
17 Application Cisco Asr 5000 Series Software 19.1.0 Version Details Vulnerabilities
18 Application Cisco Asr 5000 Series Software 19.1.0.61559 Version Details Vulnerabilities
19 Application Cisco Asr 5000 Series Software 19.2.0 Version Details Vulnerabilities
20 Application Cisco Asr 5000 Series Software 19.3.0 Version Details Vulnerabilities
21 Application Cisco Asr 5000 Series Software 20.0.0 Version Details Vulnerabilities
22 Application Cisco Virtualized Packet Core V18.0 Base Version Details Vulnerabilities
23 Application Cisco Virtualized Packet Core V19.0 Base Version Details Vulnerabilities
24 Application Cisco Virtualized Packet Core V20.0 Base Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Cisco Asr 5000 Series Software 21
Cisco Virtualized Packet Core 3

- References For CVE-2017-3819

http://www.securitytracker.com/id/1038050
SECTRACK 1038050
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170315-asr CONFIRM
http://www.securityfocus.com/bid/96913
BID 96913 Cisco StarOS CVE-2017-3819 Privilege Escalation Vulnerability Release Date:2017-03-16

- Metasploit Modules Related To CVE-2017-3819

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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