Vulnerabilities > CVE-2019-15978 - OS Command Injection vulnerability in Cisco Data Center Network Manager

047910
CVSS 7.2 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
HIGH
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
network
low complexity
cisco
CWE-78
nessus
exploit available

Summary

Multiple vulnerabilities in the REST and SOAP API endpoints of Cisco Data Center Network Manager (DCNM) could allow an authenticated, remote attacker with administrative privileges on the DCNM application to inject arbitrary commands on the underlying operating system (OS). For more information about these vulnerabilities, see the Details section of this advisory. Note: The severity of these vulnerabilities is aggravated by the vulnerabilities described in the Cisco Data Center Network Manager Authentication Bypass Vulnerabilities advisory, published simultaneously with this one.

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Command Line Execution through SQL Injection
    An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.
  • Command Delimiters
    An attack of this type exploits a programs' vulnerabilities that allows an attacker's commands to be concatenated onto a legitimate command with the intent of targeting other resources such as the file system or database. The system that uses a filter or a blacklist input validation, as opposed to whitelist validation is vulnerable to an attacker who predicts delimiters (or combinations of delimiters) not present in the filter or blacklist. As with other injection attacks, the attacker uses the command delimiter payload as an entry point to tunnel through the application and activate additional attacks through SQL queries, shell commands, network scanning, and so on.
  • Exploiting Multiple Input Interpretation Layers
    An attacker supplies the target software with input data that contains sequences of special characters designed to bypass input validation logic. This exploit relies on the target making multiples passes over the input data and processing a "layer" of special characters with each pass. In this manner, the attacker can disguise input that would otherwise be rejected as invalid by concealing it with layers of special/escape characters that are stripped off by subsequent processing steps. The goal is to first discover cases where the input validation layer executes before one or more parsing layers. That is, user input may go through the following logic in an application: In such cases, the attacker will need to provide input that will pass through the input validator, but after passing through parser2, will be converted into something that the input validator was supposed to stop.
  • Argument Injection
    An attacker changes the behavior or state of a targeted application through injecting data or command syntax through the targets use of non-validated and non-filtered arguments of exposed services or methods.
  • OS Command Injection
    In this type of an attack, an adversary injects operating system commands into existing application functions. An application that uses untrusted input to build command strings is vulnerable. An adversary can leverage OS command injection in an application to elevate privileges, execute arbitrary commands and compromise the underlying operating system.

Exploit-Db

idEDB-ID:48020
last seen2020-02-06
modified2020-02-06
published2020-02-06
reporterExploit-DB
sourcehttps://www.exploit-db.com/download/48020
titleCisco Data Center Network Manager 11.2.1 - 'LanFabricImpl' Command Injection

Nessus

NASL familyCISCO
NASL idCISCO-SA-20200102-DCNM.NASL
descriptionAccording to its self-reported version number, the instance of Cisco DCNM hosted on the remote server is prior to 11.3(1). It is, therefore, affected by multiple vulnerabilities: - An authentication bypass vulnerability exists in the REST API, SOAP API, and the web-based management interface due to a static encryption key being shared between installations. An unauthenticated, remote attacker can exploit this, via the REST API, SOAP API, or web-based management interface, to bypass authentication and execute arbitrary actions with administrative privileges. (CVE-2019-15975, CVE-2019-15976, CVE-2019-15977) - A command injection vulnerability exists in the REST API and SOAP API due to insufficient validation of user-supplied input. An authenticated, remote attacker can exploit this, via the APIs, to execute arbitrary commands. (CVE-2019-15978, CVE-2019-15979) - A path traversal vulnerability exists in the REST API and SOAP API due to insufficient validation of user-supplied input. An authenticated, remote attacker can exploit this, via the APIs, to read, write, or execute arbitrary files on the system. (CVE-2019-15980, CVE-2019-15981, CVE-2019-15982) - An XML external entity (XXE) vulnerability exists due to an incorrectly configured XML parser accepting XML external entities from an untrusted source. An authenticated, remote attacker can exploit this, via specially crafted XML data in the SOAP API, to disclose sensitive information. (CVE-2019-15983) - A SQL injection (SQLi) vulnerability exists in the SOAP API and REST API due to improper validation of user-supplied input. An authenticated, remote attacker can exploit this to inject or manipulate SQL queries in the back-end database, resulting in the disclosure or manipulation of arbitrary data. (CVE-2019-15984, CVE-2019-15985, CVE-2019-15986) - A vulnerability exists in the authentication settings of the JBOSS EAP due to an incorrect configuration. An authenticated, remote attacker can exploit this by authentication with a specific low-privilege account, to gain unauthorized access to the JBOSS EAP. (CVE-2019-15999)
last seen2020-03-28
modified2020-01-09
plugin id132721
published2020-01-09
reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/132721
titleCisco Data Center Network Manager < 11.3(1) Multiple Vulnerabilities

Packetstorm

data sourcehttps://packetstormsecurity.com/files/download/156242/cdcnm1121-inject.txt
idPACKETSTORM:156242
last seen2020-02-06
published2020-02-06
reportermr_me
sourcehttps://packetstormsecurity.com/files/156242/Cisco-Data-Center-Network-Manager-11.2.1-Command-Injection.html
titleCisco Data Center Network Manager 11.2.1 Command Injection