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Vulnerability Details : CVE-2019-1935

A vulnerability in Cisco Integrated Management Controller (IMC) Supervisor, Cisco UCS Director, and Cisco UCS Director Express for Big Data could allow an unauthenticated, remote attacker to log in to the CLI of an affected system by using the SCP User account (scpuser), which has default user credentials. The vulnerability is due to the presence of a documented default account with an undocumented default password and incorrect permission settings for that account. Changing the default password for this account is not enforced during the installation of the product. An attacker could exploit this vulnerability by using the account to log in to an affected system. A successful exploit could allow the attacker to execute arbitrary commands with the privileges of the scpuser account. This includes full read and write access to the system's database.
Publish Date : 2019-08-21 Last Update Date : 2019-08-30
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- CVSS Scores & Vulnerability Types

CVSS Score
10.0
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 Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Execute Code
CWE ID 798

- Products Affected By CVE-2019-1935

# Product Type Vendor Product Version Update Edition Language
1 Application Cisco Integrated Management Controller Supervisor 2.1.0.0 Version Details Vulnerabilities
2 Application Cisco Ucs Director 6.0.0.0 Version Details Vulnerabilities
3 Application Cisco Ucs Director 6.5.0.0 Version Details Vulnerabilities
4 Application Cisco Ucs Director 6.6.0.0 Version Details Vulnerabilities
5 Application Cisco Ucs Director 6.6.1.0 Version Details Vulnerabilities
6 Application Cisco Ucs Director 6.7.0.0 Version Details Vulnerabilities
7 Application Cisco Ucs Director 6.7(0.0.67265) Version Details Vulnerabilities
8 Application Cisco Ucs Director 6.7.1.0 Version Details Vulnerabilities
9 Application Cisco Ucs Director Express For Big Data 3.0.0.0 Version Details Vulnerabilities
10 Application Cisco Ucs Director Express For Big Data 3.5.0.0 Version Details Vulnerabilities
11 Application Cisco Ucs Director Express For Big Data 3.6.0.0 Version Details Vulnerabilities
12 Application Cisco Ucs Director Express For Big Data 3.7.0.0 Version Details Vulnerabilities
13 Application Cisco Ucs Director Express For Big Data 3.7.1.0 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Cisco Integrated Management Controller Supervisor 1
Cisco Ucs Director 7
Cisco Ucs Director Express For Big Data 5

- References For CVE-2019-1935

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190821-imcs-usercred
CISCO 20190821 Cisco Integrated Management Controller Supervisor, Cisco UCS Director, and Cisco UCS Director Express for Big Data SCP User Default Credentials Vulnerability
https://seclists.org/bugtraq/2019/Aug/49
BUGTRAQ 20190828 Multiple vulns in Cisco UCS Director: from unauth remote access to code execution as root
http://seclists.org/fulldisclosure/2019/Aug/36
FULLDISC 20190830 Multiple vulns in Cisco UCS Director: from unauth remote access to code execution as root
http://packetstormsecurity.com/files/154239/Cisco-UCS-IMC-Supervisor-Authentication-Bypass-Command-Injection.html
http://packetstormsecurity.com/files/154305/Cisco-UCS-Director-Default-scpuser-Password.html

- Metasploit Modules Related To CVE-2019-1935

Cisco UCS Director default scpuser password
This module abuses a known default password on Cisco UCS Director. The 'scpuser' has the password of 'scpuser', and allows an attacker to login to the virtual appliance via SSH. This module has been tested with Cisco UCS Director virtual machines 6.6.0 and 6.7.0. Note that Cisco also mentions in their advisory that their IMC Supervisor and UCS Director Express are also affected by these vulnerabilities, but this module was not tested with those products.
Module type : exploit Rank : excellent Platforms : Unix


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