ESB-2019.0215 - [Cisco] Cisco Enterprise NFV Infrastructure Software: Unauthorised access - Existing account 2019-01-24

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.0215
         Cisco Enterprise NFV Infrastructure Software Linux Shell
                           Access Vulnerability
                              24 January 2019

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Cisco Enterprise NFV Infrastructure Software
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Unauthorised Access -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-1656  

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-nfvis-shell-access

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Cisco Enterprise NFV Infrastructure Software Linux Shell Access Vulnerability

Priority:        Medium

Advisory ID:     cisco-sa-20190123-nfvis-shell-access

First Published: 2019 January 23 16:00 GMT

Version 1.0:     Final

Workarounds:     No workarounds available

Cisco Bug IDs:   CSCvm80829

CVE-2019-1656    

CWE-20

CVSS Score:
5.3  AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:X

Summary

  o 
    A vulnerability in the CLI of Cisco Enterprise NFV Infrastructure Software
    (NFVIS) could allow an authenticated, local attacker to access the shell
    of the underlying Linux operating system on the affected device.

    The vulnerability is due to improper input validation in the affected
    software. An attacker could exploit this vulnerability by sending crafted
    commands to the affected device. An exploit could allow the attacker to
    gain shell access with a nonroot user account to the underlying Linux
    operating system on the affected device and potentially access system
    configuration files with sensitive information.

    This vulnerability only affects console connections from CIMC. It does not
    apply to remote connections, such as telnet or SSH.

    Cisco has released software updates that address this vulnerability. There
    are no workarounds that address this vulnerability.

    This advisory is available at the following link:
    https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-nfvis-shell-access

Affected Products

  o Vulnerable Products

    This vulnerability affects Cisco Enterprise NFV Infrastructure Software
    (NFVIS). For information about affected software releases, consult the
    Cisco bug IDs at the top of this advisory.

    Products Confirmed Not Vulnerable

    Only products listed in the Vulnerable Products section of this advisory
    are known to be affected by this vulnerability.

Workarounds

  o There are no workarounds that address this vulnerability.

Fixed Software

  o For information about fixed software releases, consult the Cisco bug ID(s)
    at the top of this advisory.

    When considering software upgrades, customers are advised to regularly
    consult the advisories for Cisco products, which are available from the
    Cisco Security Advisories and Alerts page, to determine exposure and a
    complete upgrade solution.

    In all cases, customers should ensure that the devices to be upgraded
    contain sufficient memory and confirm that current hardware and software
    configurations will continue to be supported properly by the new release.
    If the information is not clear, customers are advised to contact the
    Cisco Technical Assistance Center (TAC) or their contracted maintenance
    providers.

Exploitation and Public Announcements

  o The Cisco Product Security Incident Response Team (PSIRT) is not aware of
    any public announcements or malicious use of the vulnerability that is
    described in this advisory.

Source

  o This vulnerability was found during internal security testing.

Cisco Security Vulnerability Policy

  o To learn about Cisco security vulnerability disclosure policies and
    publications, see the Security Vulnerability Policy. This document also
    contains instructions for obtaining fixed software and receiving security
    vulnerability information from Cisco.

Subscribe to Cisco Security Notifications

  o Subscribe

URL

  o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-nfvis-shell-access

Revision History

  o 
    +----------+---------------------------+----------+--------+------------------+
    | Version  |        Description        | Section  | Status |       Date       |
    +----------+---------------------------+----------+--------+------------------+
    | 1.0      | Initial public release.   |          | Final  | 2019-January-23  |
    +----------+---------------------------+----------+--------+------------------+

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