Operating System:

[Cisco]

Published:

21 January 2021

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.0249
     Cisco Email Security Appliance, Cisco Content Security Management
          Appliance, and Cisco Web Security Appliance Information
                         Disclosure Vulnerability
                              21 January 2021

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

Product:           Cisco Email Security Appliance (ESA)
                   Cisco Content Security Management Appliance (SMA)
                   Cisco Web Security Appliance (WSA)
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Access Confidential Data -- Remote/Unauthenticated
                   Unauthorised Access      -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-1129  

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-wsa-sma-info-RHp44vAC

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Cisco Email Security Appliance, Cisco Content Security Management Appliance,
and Cisco Web Security Appliance Information Disclosure Vulnerability

Priority:        Medium
Advisory ID:     cisco-sa-esa-wsa-sma-info-RHp44vAC
First Published: 2021 January 20 16:00 GMT
Version 1.0:     Final
Workarounds:     No workarounds available
Cisco Bug IDs:   CSCvu89555 CSCvu93199 CSCvu93201
CVE Names:       CVE-2021-1129
CWEs:            CWE-201

Summary

  o A vulnerability in the authentication for the general purpose APIs
    implementation of Cisco Email Security Appliance (ESA), Cisco Content
    Security Management Appliance (SMA), and Cisco Web Security Appliance (WSA)
    could allow an unauthenticated, remote attacker to access general system
    information and certain configuration information from an affected device.

    The vulnerability exists because a secure authentication token is not
    required when authenticating to the general purpose API. An attacker could
    exploit this vulnerability by sending a crafted request for information to
    the general purpose API on an affected device. A successful exploit could
    allow the attacker to obtain system and configuration information from the
    affected device, resulting in an unauthorized information disclosure.

    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-esa-wsa-sma-info-RHp44vAC

Affected Products

  o Vulnerable Products

    At the time of publication, this vulnerability affected Cisco ESA, Cisco
    SMA, and Cisco WSA if they supported general purpose API and the release
    was earlier than the first fixed release.

    The general purpose API was first supported in the following Cisco software
    releases:

       ESA Release 13.0
       SMA Release 12.5
       WSA Release 11.8

    See the Details section in the bug ID(s) at the top of this advisory for
    the most complete and current information.

    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 general purpose API and the information obtained by this API are
    described in the General Purpose APIs chapter of the AsyncOS 13.0 API for
    Cisco Email Security Appliances Getting Started Guide .

Workarounds

  o There are no workarounds that address this vulnerability.

Fixed Software

  o 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.

    Fixed Releases

    At the time of publication, the following Cisco software releases contained
    the fix for this vulnerability:

       ESA releases 13.5.2 and later
       SMA releases 13.8.0 and later
       WSA releases 12.5.1 and later

    See the Details section in the bug ID(s) at the top of this advisory for
    the most complete and current information.

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.

URL

  o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-wsa-sma-info-RHp44vAC

Revision History

  o +----------+---------------------------+----------+--------+--------------+
    | Version  |        Description        | Section  | Status |     Date     |
    +----------+---------------------------+----------+--------+--------------+
    | 1.0      | Initial public release.   | -        | Final  | 2021-JAN-20  |
    +----------+---------------------------+----------+--------+--------------+

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