Operating System:

[Cisco]

Published:

04 February 2020

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                              ESB-2020.0279.2
          Cisco Web Security Appliance and Cisco Content Security
         Management Appliance HTTP Header Injection Vulnerability
                              4 February 2020

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

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

Product:           Cisco Web Security Appliance
                   Cisco Content Security Management Appliance
Operating System:  Cisco
Impact/Access:     Provide Misleading Information -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-3117  

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
   cisco-sa-20200122-wsa-sma-header-inject

Revision History:  February  4 2020: Updated information about WSA vulnerable releases.
                   January  28 2020: Initial Release

- --------------------------BEGIN INCLUDED TEXT--------------------

Cisco Web Security Appliance and Cisco Content Security Management Appliance
HTTP Header Injection Vulnerability

Priority:        Medium

Advisory ID:     cisco-sa-20200122-wsa-sma-header-inject

First Published: 2020 January 22 16:00 GMT

Last Updated:    2020 February 3 16:50 GMT

Version 1.1:     Final

Workarounds:     No workarounds availableCisco Bug IDs:   CSCvp16724CSCvq04931

CVE-2020-3117    

CWE-113

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

Summary

  o A vulnerability in the API Framework of Cisco AsyncOS for Cisco Web
    Security Appliance (WSA) and Cisco Content Security Management Appliance
    (SMA) could allow an unauthenticated, remote attacker to inject crafted
    HTTP headers in the web server's response.

    The vulnerability is due to insufficient validation of user input. An
    attacker could exploit this vulnerability by persuading a user to access a
    crafted URL and receive a malicious HTTP response. A successful exploit
    could allow the attacker to inject arbitrary HTTP headers into valid HTTP
    responses sent to a user's browser.

    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-20200122-wsa-sma-header-inject

Affected Products

  o Vulnerable Products

    At the time of publication, this vulnerability affected Cisco WSA releases
    12.0.1-268 and 11.8.0-382. No release prior to WSA 11.8 is affected by this
    vulnerability.

    At the time of publication, this vulnerability affected Cisco SMA releases
    earlier than Release 13.0.0-187.

    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.

    Cisco has confirmed that this vulnerability does not affect Cisco Email
    Security Appliance (ESA).

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 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.

    Fixed Releases

    At the time of publication, Cisco SMA releases 13.0.0-187 and later
    contained the fix for this vulnerability.

    For information about fixed software releases for Cisco WSA, see the
    Details section in the bug ID(s) at the top of this advisory.

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-20200122-wsa-sma-header-inject

Revision History

  o +---------+----------------------+------------+--------+------------------+
    | Version |     Description      |  Section   | Status |       Date       |
    +---------+----------------------+------------+--------+------------------+
    |         | Updated information  | Vulnerable |        |                  |
    | 1.1     | about WSA vulnerable | Products   | Final  | 2020-February-03 |
    |         | releases.            |            |        |                  |
    +---------+----------------------+------------+--------+------------------+
    | 1.0     | Initial public       | -          | Final  | 2020-January-22  |
    |         | release.             |            |        |                  |
    +---------+----------------------+------------+--------+------------------+

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