ESB-2018.3198.5 - UPDATE [Cisco] libssh in Cisco Products: Unauthorised access - Remote/unauthenticated 2018-11-06

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             AUSCERT External Security Bulletin Redistribution

                              ESB-2018.3198.5
        libssh Authentication Bypass Vulnerability Affecting Cisco
                          Products: October 2018
                              6 November 2018

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

Product:           libssh in Cisco Products
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Unauthorised Access -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-10933  

Reference:         ESB-2018.3185
                   ESB-2018.3171
                   ESB-2018.3135

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181019-libssh

Revision History:  November  6 2018: Updated the lists of products under
                                     investigation, vulnerable products, and
				     products confirmed not vulnerable.
                   October  26 2018: Updated the lists of products under
		                     investigation, vulnerable products, and
				     products confirmed not vulnerable.
                   October  25 2018: Updated the lists of products under
				     investigation, vulnerable products, and
				     products confirmed not vulnerable.
                   October  24 2018: Updated the lists of products under
				     investigation, vulnerable products, and
				     products confirmed not vulnerable.
                   October  22 2018: Initial Release


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Cisco Security Advisory

libssh Authentication Bypass Vulnerability Affecting Cisco Products: October
2018

Priority:         Critical
Advisory ID:      cisco-sa-20181019-libssh
First Published:  2018 October 19 16:00 GMT
Last Updated:     2018 October 25 16:11 GMT
Version 1.4:      Interim
Workarounds:      No workarounds available
Cisco Bug ID:     CVE-2018-10933
                  CWE-287

Summary

  o A vulnerability in libssh could allow an unauthenticated, remote attacker
    to bypass authentication on a targeted system.

    The vulnerability is due to improper authentication operations by the
    server-side state machine of the affected software. An attacker could
    exploit this vulnerability by presenting a SSH2_MSG_USERAUTH_SUCCESS
    message to a targeted system. A successful exploit could allow the attacker
    to bypass authentication and gain unauthorized access to a targeted system.

    This advisory will be updated as additional information becomes available.

    This advisory is available at the following link:
    https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
    cisco-sa-20181019-libssh

Affected Products

  * Cisco investigated its product line to determine which products and
    services may be affected by this vulnerability.

    The Vulnerable Products section will include Cisco bug IDs for each
    affected product or service. The bugs are accessible through the Cisco Bug
    Search Tool and contain additional platform-specific information, including
    workarounds (if available) and fixed software releases.

    Any product not listed in the Vulnerable Products section of this advisory
    is to be considered not vulnerable.
   
    Vulnerable Products

    Cisco has investigated its product line and has determined that no products
    or services are known to be affected by this vulnerability.

    Products Confirmed Not Vulnerable

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

    Cisco has confirmed that this vulnerability does not affect the following
    products and services. All members of the product families in the following
    list are not considered to be affected by this vulnerability unless they
    are explicitly listed in the preceding Vulnerable Products section:

    Cable Modems
      + Cisco Stealthwatch Online Visibility Assessment

    Collaboration and Social Media
      + Cisco Webex Meetings Server

    Endpoint Clients and Client Software
      + Cisco Jabber Guest

    Network Application, Service, and Acceleration
      + Cisco Adaptive Security Appliance (ASA) Software
      + Cisco Cloud Services Platform 2100

    Network and Content Security Devices
      + Cisco ASA Next-Generation Firewall Services
      + Cisco Content Security Management Appliance (SMA)
      + Cisco Email Security Appliance (ESA)
      + Cisco FireSIGHT System
      + Cisco Identity Services Engine (ISE)
      + Cisco Web Security Appliance (WSA)

    Network Management and Provisioning
      + Cisco Elastic Services Controller (ESC)
      + Cisco Enterprise Service Automation
      + Cisco FindIT Network Manager
      + Cisco NetFlow Generation Appliance
      + Cisco Network Analysis Module
      + Cisco Policy Suite
      + Cisco Prime Access Registrar
      + Cisco Prime Collaboration Provisioning
      + Cisco Prime Infrastructure
      + Cisco Prime Network Registrar Virtual Appliance
      + Cisco Prime Network Registrar
      + Cisco Prime Performance Manager
      + Cisco WAN Automation Engine (WAE)

    Routing and Switching - Enterprise and Service Provider
      + Cisco Application Policy Infrastructure Controller (APIC)
      + Cisco IOS XR Software for Cisco Network Convergence System 6000 Series
        Routers
      + Cisco IOS XR Software
      + Cisco Nexus 9000 Series Switches - Standalone, NX-OS mode
      + Cisco Nexus 9000 Series Switches

    Unified Computing
      + Cisco UCS Director

    Voice and Unified Communications Devices
      + Cisco IP Interoperability and Collaboration System (IPICS)
      + Cisco Management Heartbeat Server
      + Cisco Unified Communications Manager Session Management Edition
      + Cisco Unified Communications Manager
      + Cisco Unified Contact Center Express

    Video, Streaming, TelePresence, and Transcoding Devices
      + Cisco Cloud Object Storage
      + Cisco DCM Series D990x Digital Content Manager
      + Cisco VDS Recorder
      + Cisco VDS-TV Caching Nodes
      + Cisco VDS-TV Streamer
      + Cisco VDS-TV Vault
      + Cisco Video Distribution Suite for Internet Streaming (VDS-IS/CDS-IS)
      + Cisco Video Surveillance 4300E and 4500E High-Definition IP Cameras
      + Cisco Video Surveillance Media Server

    Wireless
      + Cisco Wireless LAN Controller

    Cisco Cloud Hosted Services
      + Cisco Cloud Email Security
      + Cisco Cloudlock
      + Cisco Energy Management
      + Cisco Smart Software Manager Satellite
      + Cisco Stealthwatch Learning Networks License
      + Cisco Umbrella
      + Cisco Virtual HetNet

Workarounds

  o Any workarounds will be documented in the product-specific Cisco bugs,
    which are identified in the Vulnerable Products section of this advisory.

Fixed Software

  o For information about fixed software releases, consult the Cisco bugs
    identified in the Vulnerable Products section 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
    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 On October 16, 2018, libssh.org publicly disclosed this vulnerability in a
    security bulletin at the following link: https://www.libssh.org/2018/10/16/
    libssh-0-8-4-and-0-7-6-security-and-bugfix-release/

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.

Related to This Advisory

  o libssh Server-Side State Machine Unauthorized Access Vulnerability

URL

  o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
    cisco-sa-20181019-libssh

Revision History

  o
    +---------+----------------------------+----------+---------+-----------------+
    | Version |        Description         | Section  | Status  |      Date       |
    +---------+----------------------------+----------+---------+-----------------+
    |         | Updated the lists of       |          |         |                 |
    |         | products under             | Affected |         |                 |
    | 1.4     | investigation, vulnerable  | Products | Interim | 2018-October-25 |
    |         | products, and products     |          |         |                 |
    |         | confirmed not vulnerable.  |          |         |                 |
    +---------+----------------------------+----------+---------+-----------------+
    |         | Updated the lists of       |          |         |                 |
    |         | products under             | Affected |         |                 |
    | 1.3     | investigation, vulnerable  | Products | Interim | 2018-October-24 |
    |         | products, and products     |          |         |                 |
    |         | confirmed not vulnerable.  |          |         |                 |
    +---------+----------------------------+----------+---------+-----------------+
    |         | Updated the lists of       |          |         |                 |
    |         | products under             | Affected |         |                 |
    | 1.2     | investigation, vulnerable  | Products | Interim | 2018-October-23 |
    |         | products, and products     |          |         |                 |
    |         | confirmed not vulnerable.  |          |         |                 |
    +---------+----------------------------+----------+---------+-----------------+
    |         | Updated the lists of       |          |         |                 |
    |         | products under             | Affected |         |                 |
    | 1.1     | investigation, vulnerable  | Products | Interim | 2018-October-22 |
    |         | products, and products     |          |         |                 |
    |         | confirmed not vulnerable.  |          |         |                 |
    +---------+----------------------------+----------+---------+-----------------+
    | 1.0     | Initial public release.    | --        | Interim | 2018-October-19 |
    +---------+----------------------------+----------+---------+-----------------+


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Legal Disclaimer

  o THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND
    OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR
    FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT
    OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES
    THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME. CISCO EXPECTS TO
    UPDATE THIS DOCUMENT AS NEW INFORMATION BECOMES AVAILABLE.

    A standalone copy or paraphrase of the text of this document that omits the
    distribution URL is an uncontrolled copy and may lack important information
    or contain factual errors. The information in this document is intended for
    end users of Cisco products.

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.

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