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             AUSCERT External Security Bulletin Redistribution

                              ESB-2024.0836.2
    Cisco Expressway Series Cross-Site Request Forgery Vulnerabilities
                             13 February 2024

===========================================================================

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

Product:           Cisco Expressway Series
Publisher:         Cisco Systems
Operating System:  Cisco
Resolution:        Patch/Upgrade
CVE Names:         CVE-2024-20255 CVE-2024-20254 CVE-2024-20252

Original Bulletin: 
   https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-expressway-csrf-KnnZDMj3

Comment: CVSS (Max):  9.6 CVE-2024-20254 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H)
         CVSS Source: Cisco Systems
         Calculator:  https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Revision History:  February 13 2024: Updated list of vulnerable products and release fixes.
                   February  8 2024: Initial Release

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Cisco Expressway Series Cross-Site Request Forgery Vulnerabilities

Priority:        Critical
Advisory ID:     cisco-sa-expressway-csrf-KnnZDMj3
First Published: 2024 February 7 16:00 GMT
Last Updated:    2024 February 12 17:55 GMT
Version 1.1:     Final
Workarounds:     No workarounds available
Cisco Bug IDs:   CSCwa25074 CSCwa25099 CSCwa25100
CVE Names:       CVE-2024-20252 CVE-2024-20254 CVE-2024-20255
CWEs:            CWE-352

Summary

  o Multiple vulnerabilities in the Cisco Expressway Series could allow an
    unauthenticated, remote attacker to conduct cross-site request forgery
    (CSRF) attacks, which could allow the attacker to perform arbitrary actions
    on an affected device.

    Note: Cisco Expressway Series refers to Cisco Expressway Control
    (Expressway-C) devices and Cisco Expressway Edge (Expressway-E) devices.

    For more information about these vulnerabilities, see the Details section
    of this advisory.

    Cisco has released software updates that address these vulnerabilities.
    There are no workarounds that address these vulnerabilities.

    This advisory is available at the following link:
    https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-expressway-csrf-KnnZDMj3

Affected Products

  o Vulnerable Products

    CVE-2024-20254 and CVE-2024-20255: These vulnerabilities affect Cisco
    Expressway Series devices in the default configuration.

    CVE-2024-20252: This vulnerability affects Cisco Expressway Series devices
    if the cluster database (CDB) API feature has been enabled. This feature is
    disabled by default in Cisco Expressway Series releases 14.2 and later. In
    releases earlier than Cisco Expressway Series Release 14.2, the cluster
    database (CDB) API feature is enabled by default and cannot be disabled.

    For information about which Cisco software releases are vulnerable, see the
    Fixed Software section of this advisory.

    Products Confirmed Not Vulnerable

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

Details

  o The vulnerabilities are not dependent on one another. Exploitation of one
    of the vulnerabilities is not required to exploit another vulnerability. In
    addition, a software release that is affected by one of the vulnerabilities
    may not be affected by the other vulnerabilities.

    Details about the vulnerabilities are as follows:

    CVE-2024-20252 and CVE-2024-20254: Cisco Expressway Series Cross-Site
    Request Forgery Vulnerabilities

    Two vulnerabilities in the API of Cisco Expressway Series devices could
    allow an unauthenticated, remote attacker to conduct CSRF attacks on an
    affected system.

    These vulnerabilities are due to insufficient CSRF protections for the
    web-based management interface of an affected system. An attacker could
    exploit these vulnerabilities by persuading a user of the API to follow a
    crafted link. A successful exploit could allow the attacker to perform
    arbitrary actions with the privilege level of the affected user. If the
    affected user has administrative privileges, these actions could include
    modifying the system configuration and creating new privileged accounts.

    Cisco has released software updates that address these vulnerabilities.
    There are no workarounds that address these vulnerabilities.

    Bug ID(s): CSCwa25099 and CSCwa25100
    CVE ID: CVE-2024-20252 and CVE-2024-20254
    Security Impact Rating (SIR): Critical
    CVSS Base Score: 9.6
    CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

    CVE-2024-20255: Cisco Expressway Series Cross-Site Request Forgery
    Vulnerability

    A vulnerability in the API of the Cisco Expressway Series could allow an
    unauthenticated, remote attacker to conduct a CSRF attack on an affected
    system.

    This vulnerability is due to insufficient CSRF protections for the
    web-based management interface of an affected system. An attacker could
    exploit this vulnerability by persuading a user of the API to follow a
    crafted link. A successful exploit could allow the attacker to perform
    arbitrary actions with the privilege level of the affected user. If the
    affected user has administrative privileges, these actions could include
    overwriting system configuration settings, which could prevent the system
    from processing calls properly and result in a denial of service (DoS)
    condition.

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

    Bug ID(s): CSCwa25074
    CVE ID: CVE-2024-20255
    Security Impact Rating (SIR): High
    CVSS Base Score: 8.2
    CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:L

Workarounds

  o There are no workarounds that address these vulnerabilities.

Fixed Software

  o Cisco has released free software updates that address the vulnerabilities
    described in this advisory. Customers with service contracts that entitle
    them to regular software updates should obtain security fixes through their
    usual update channels.

    Customers may only install and expect support for software versions and
    feature sets for which they have purchased a license. By installing,
    downloading, accessing, or otherwise using such software upgrades,
    customers agree to follow the terms of the Cisco software license:
    https://www.cisco.com/c/en/us/products/end-user-license-agreement.html

    Additionally, customers may only download software for which they have a
    valid license, procured from Cisco directly, or through a Cisco authorized
    reseller or partner. In most cases this will be a maintenance upgrade to
    software that was previously purchased. Free security software updates do
    not entitle customers to a new software license, additional software
    feature sets, or major revision upgrades.

    The Cisco Support and Downloads page on Cisco.com provides information
    about licensing and downloads. This page can also display customer device
    support coverage for customers who use the My Devices tool.

    When considering software upgrades , customers are advised to regularly
    consult the advisories for Cisco products, which are available from the
    Cisco Security Advisories 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.

    Customers Without Service Contracts

    Customers who purchase directly from Cisco but do not hold a Cisco service
    contract and customers who make purchases through third-party vendors but
    are unsuccessful in obtaining fixed software through their point of sale
    should obtain upgrades by contacting the Cisco TAC: https://www.cisco.com/c
    /en/us/support/web/tsd-cisco-worldwide-contacts.html

    Customers should have the product serial number available and be prepared
    to provide the URL of this advisory as evidence of entitlement to a free
    upgrade.

    Fixed Releases

    In the following table, the left column lists Cisco software releases. The
    right column indicates whether a release is affected by the vulnerabilities
    that are described in this advisory and the first release that includes the
    fix for these vulnerabilities. Customers are advised to upgrade to an
    appropriate fixed software release as indicated in this section.

    Cisco Expressway Series Release          First Fixed Release
    Earlier than 14                          Migrate to a fixed release.
    14                                       14.3.4 ^1
    15                                       15.0.0 ^1

    1. To enable the complete fix, run the xconfiguration Security
    CSRFProtection status : "Enabled" command, as detailed in the Cisco
    Expressway Administrator Guide .

    Cisco TelePresence Video Communication Server

    Cisco TelePresence Video Communication Server (VCS) has reached its
    end-of-support date and is no longer included in Cisco Expressway Series
    advisories. Cisco has not released and will not release software updates
    for Cisco TelePresence VCS to address the vulnerabilities that are
    described in this advisory. Customers are advised to refer to the
    end-of-life notice for Cisco TelePresence VCS:

    https://www.cisco.com/c/en/us/products/collateral/unified-communications/telepresence-video-communication-server-vcs/eos-eol-notice-c51-743969.html

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

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

    The Cisco Product Security Incident Response Team (PSIRT) validates only
    the affected and fixed release information that is documented in this
    advisory.

Exploitation and Public Announcements

  o The Cisco PSIRT is not aware of any public announcements or malicious use
    of the vulnerabilities that are described in this advisory.

Source

  o CVE-2024-20252 and CVE-2024-20254: These vulnerabilities were found during
    internal security testing by Jason Crowder of the Cisco Advanced Security
    Initiatives Group (ASIG).

    CVE-2024-20255: 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

Related to This Advisory

  o 

URL

  o https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-expressway-csrf-KnnZDMj3

Revision History

  o +---------+-----------------------+----------------+--------+-------------+
    | Version |      Description      |    Section     | Status |    Date     |
    +---------+-----------------------+----------------+--------+-------------+
    |         | Clarified vulnerable  | Vulnerable     |        |             |
    | 1.1     | product information   | Products and   | Final  | 2024-FEB-12 |
    |         | and fixed releases.   | Fixed Releases |        |             |
    +---------+-----------------------+----------------+--------+-------------+
    | 1.0     | Initial public        | -              | Final  | 2024-FEB-07 |
    |         | release.              |                |        |             |
    +---------+-----------------------+----------------+--------+-------------+

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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