ESB-2018.1688 - [Cisco] Cisco Wide Area Application Services: Multiple vulnerabilities 2018-06-07

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.1688
  Security Vulnerabilities Cisco Wide Area Application Services Software
                                7 June 2018

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

Product:           Cisco Wide Area Application Services
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Root Compromise          -- Existing Account      
                   Access Confidential Data -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-0352 CVE-2018-0329 

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180606-waas-priv-escalation
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180606-waas-snmp

Comment: This bulletin contains two (2) Cisco Systems security advisories.

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Cisco Wide Area Application Services Software Disk Check Tool Privilege
Escalation Vulnerability

Medium
Advisory ID: cisco-sa-20180606-waas-priv-escalation
First Published: 2018 June 6 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvi72673

CVSS Score: Base 6.7
CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X
CVE-2018-0352
CWE-264

Summary

  o A vulnerability in the Disk Check Tool (disk-check.sh) for Cisco Wide Area
    Application Services (WAAS) Software could allow an authenticated, local
    attacker to elevate their privilege level to root. The attacker must have
    valid user credentials with super user privileges (level 15) to log in to
    the device.

    The vulnerability is due to insufficient validation of script files
    executed in the context of the Disk Check Tool. An attacker could exploit
    this vulnerability by replacing one script file with a malicious script
    file while the affected tool is running. A successful exploit could allow
    the attacker to gain root-level privileges and take full control of the
    device.

    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-20180606-waas-priv-escalation

Affected Products

  o Vulnerable Products

    This vulnerability affects Cisco Wide Area Application Services (WAAS)
    Software. For information about affected software releases, consult the
    Cisco bug ID(s) 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.

Details

  o The WAAS Disk Check Tool (disk-check.sh) has been removed from Cisco.com
    and is no longer available for download. However, the tool could still be
    used to elevate privileges on devices running WAAS Software that do not yet
    have the fix for this vulnerability by attackers who downloaded the tool
    previously.

    The fix for this vulnerability significantly changes the script signing and
    validation methodology in WAAS Software. As a result of this change, any
    scripts that were signed using the previous method will no longer run in
    WAAS releases that include the fix for this vulnerability.

    Signed scripts are typically provided to address a specific problem for a
    limited set of releases only, so we generally do not expect previous
    scripts to still be required after upgrade. In a situation where they still
    apply after the upgrade to a release addressing this vulnerability,
    customers are advised to contact the Cisco Technical Assistance Center
    (TAC) to get their scripts updated.

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 Cisco would like to thank external researcher Aaron Blair from RIoT
    Solutions in Brisbane, Australia for reporting this vulnerability.

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-20180606-waas-priv-escalation

Revision History

  o +---------+---------------------------+---------+--------+---------------+
    | Version |        Description        | Section | Status |     Date      |
    +---------+---------------------------+---------+--------+---------------+
    | 1.0     | Initial public release.   | --      | Final  | 2018-June-06  |
    +---------+---------------------------+---------+--------+---------------+

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.

    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.

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Cisco Wide Area Application Services Software Static SNMP Credentials
Vulnerability

Medium
Advisory ID: cisco-sa-20180606-waas-snmp
First Published: 2018 June 6 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvi40137

CVSS Score: Base 5.3
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:X/RL:X/RC:X
CVE-2018-0329
CWE-798

Summary

  o A vulnerability in the default configuration of the Simple Network
    Management Protocol (SNMP) feature of Cisco Wide Area Application Services
    (WAAS) Software could allow an unauthenticated, remote attacker to read
    data from an affected device via SNMP.

    The vulnerability is due to a hard-coded, read-only community string in the
    configuration file for the SNMP daemon. An attacker could exploit this
    vulnerability by using the static community string in SNMP version 2c
    queries to an affected device. A successful exploit could allow the
    attacker to read any data that is accessible via SNMP on the affected
    device.

    Note: The static credentials are defined in an internal configuration file
    and are not visible in the current operation configuration
    ('running-config') or the startup configuration ('startup-config').

    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-20180606-waas-snmp

Affected Products

  o Vulnerable Products

    This vulnerability affects Cisco Wide Area Application Services (WAAS)
    Software with default configuration. For information about affected
    software releases, consult the Cisco bug ID(s) 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 Cisco would like to thank external researcher Aaron Blair from RIoT
    Solutions in Brisbane, Australia  for reporting this vulnerability.

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-20180606-waas-snmp

Revision History

  o +---------+---------------------------+---------+--------+---------------+
    | Version |        Description        | Section | Status |     Date      |
    +---------+---------------------------+---------+--------+---------------+
    | 1.0     | Initial public release.   | --      | Final  | 2018-June-06  |
    +---------+---------------------------+---------+--------+---------------+

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.

    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.

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