8.8
HIGH
CVE-2017-3819
"Cisco StarOS SSH Remote Privilege Escalation"
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.

INFO

Published Date :

March 15, 2017, 8:59 p.m.

Last Modified :

Oct. 3, 2019, 12:03 a.m.

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

2.8
Affected Products

The following products are affected by CVE-2017-3819 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Cisco asr_5000_series_software
2 Cisco virtualized_packet_core
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2017-3819.

URL 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

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2017-3819 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2017-3819 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Oct. 09, 2019

    Action Type Old Value New Value
    Added CWE Cisco Systems, Inc. CWE-264
  • CWE Remap by [email protected]

    Oct. 03, 2019

    Action Type Old Value New Value
    Changed CWE CWE-264 CWE-306
  • CVE Modified by [email protected]

    Jul. 12, 2017

    Action Type Old Value New Value
    Added Reference http://www.securitytracker.com/id/1038050 [No Types Assigned]
  • Initial Analysis by [email protected]

    Mar. 30, 2017

    Action Type Old Value New Value
    Added CVSS V2 (AV:N/AC:L/Au:S/C:C/I:C/A:C)
    Added CVSS V3 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type http://www.securityfocus.com/bid/96913 No Types Assigned http://www.securityfocus.com/bid/96913 Third Party Advisory, VDB Entry
    Changed Reference Type https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170315-asr No Types Assigned https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170315-asr Vendor Advisory
    Added CWE CWE-264
    Added CPE Configuration OR *cpe:2.3:a:cisco:asr_5000_series_software:18.0.0:*:*:*:*:*:*:* *cpe:2.3:a:cisco:asr_5000_series_software:18.0.0.57828:*:*:*:*:*:*:* *cpe:2.3:a:cisco:asr_5000_series_software:18.0.0.59167:*:*:*:*:*:*:* *cpe:2.3:a:cisco:asr_5000_series_software:18.0.0.59211:*:*:*:*:*:*:* *cpe:2.3:a:cisco:asr_5000_series_software:18.0.l0.59219:*:*:*:*:*:*:* *cpe:2.3:a:cisco:asr_5000_series_software:18.1.0:*:*:*:*:*:*:* *cpe:2.3:a:cisco:asr_5000_series_software:18.1.0.59776:*:*:*:*:*:*:* *cpe:2.3:a:cisco:asr_5000_series_software:18.1.0.59780:*:*:*:*:*:*:* *cpe:2.3:a:cisco:asr_5000_series_software:18.1_base:*:*:*:*:*:*:* *cpe:2.3:a:cisco:asr_5000_series_software:18.3.0:*:*:*:*:*:*:* *cpe:2.3:a:cisco:asr_5000_series_software:18.3_base:*:*:*:*:*:*:* *cpe:2.3:a:cisco:asr_5000_series_software:18.4.0:*:*:*:*:*:*:* *cpe:2.3:a:cisco:asr_5000_series_software:19.0.1:*:*:*:*:*:*:* *cpe:2.3:a:cisco:asr_5000_series_software:19.0.m0.60737:*:*:*:*:*:*:* *cpe:2.3:a:cisco:asr_5000_series_software:19.0.m0.60828:*:*:*:*:*:*:* *cpe:2.3:a:cisco:asr_5000_series_software:19.0.m0.61045:*:*:*:*:*:*:* *cpe:2.3:a:cisco:asr_5000_series_software:19.1.0:*:*:*:*:*:*:* *cpe:2.3:a:cisco:asr_5000_series_software:19.1.0.61559:*:*:*:*:*:*:* *cpe:2.3:a:cisco:asr_5000_series_software:19.2.0:*:*:*:*:*:*:* *cpe:2.3:a:cisco:asr_5000_series_software:19.3.0:*:*:*:*:*:*:* *cpe:2.3:a:cisco:asr_5000_series_software:20.0.0:*:*:*:*:*:*:* *cpe:2.3:a:cisco:virtualized_packet_core:v18.0_base:*:*:*:*:*:*:* *cpe:2.3:a:cisco:virtualized_packet_core:v19.0_base:*:*:*:*:*:*:* *cpe:2.3:a:cisco:virtualized_packet_core:v20.0_base:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Mar. 17, 2017

    Action Type Old Value New Value
    Added Reference http://www.securityfocus.com/bid/96913 [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2017-3819 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.22 }} -0.01%

score

0.58419

percentile

CVSS30 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability