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Activetouch General Plugin ContainerPlugin / extension · Cisco

CVE-2017-3823

HIGH · 8.8 CVSS v3.0 Published 2017-02-01
Fix available
A fix is available. Upgrade to after 10031.6.2017.0125 or later.
See remediation →
95/100
Remediation priority · Urgent
Remotely reachable No privileges

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
An issue was discovered in the Cisco WebEx Extension before 1.0.7 on Google Chrome, the ActiveTouch General Plugin Container before 106 on Mozilla Firefox, the GpcContainer Class ActiveX control plugin before 10031.6.2017.0126 on Internet Explorer, and the Download Manager ActiveX control plugin before 2.1.0.10 on Internet Explorer. A vulnerability in these Cisco WebEx browser extensions could allow an unauthenticated, remote attacker to execute arbitrary code with the privileges of the affected browser on an affected system. This vulnerability affects the browser extensions for Cisco WebEx Meetings Server and Cisco WebEx Centers (Meeting Center, Event Center, Training Center, and Support Center) when they are running on Microsoft Windows. The vulnerability is a design defect in an application programing interface (API) response parser within the extension. An attacker that can convince an affected user to visit an attacker-controlled web page or follow an attacker-supplied link with an affected browser could exploit the vulnerability. If successful, the attacker could execute arbitrary code with the privileges of the affected browser.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

Multiple Cisco WebEx browser extensions (Chrome, Firefox, Internet Explorer) contain a design defect in their API response parser. This vulnerability allows unauthenticated remote attackers to execute arbitrary code with the privileges of the affected browser by tricking users into visiting attacker-controlled web pages.

MitigationUpdate Cisco WebEx browser extensions to the fixed versions: Chrome to 1.0.7, Firefox ActiveTouch plugin to 106, IE GpcContainer Class to 10031.6.2017.0126, and IE Download Manager to 2.1.0.10.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Activetouch General Plugin ContainerPlugin / extension
Affected:= 105
Download ManagerApplication
Affected:= 2.1.0.9
Gpccontainer ClassApplication
Affected:<= 10031.6.2017.0125
WebexApplication
Affected:<= 1.0.6
Webex Meetings ServerApplication
Affected:= 2.0_base= 2.0_mr2= 2.0_mr3= 2.0_mr4= 2.0_mr5= 2.0_mr6= 2.0_mr7= 2.0_mr8= 2.0_mr9= 2.5_base= 2.5_mr1= 2.5_mr2
Webex Meeting CenterApplication
Affected:= 2.6_base= 2.6_mr1= 2.6_mr2= 2.6_mr3= 2.7_base= 2.7_mr1= 2.7_mr2= t29_base= t30_base= t31_base

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Check Cisco WebEx Chrome extension version
    Open Chrome and navigate to chrome://extensions, enable Developer mode, find the WebEx extension, and note the version number. Alternatively, check the manifest.json file in the extension install directory (typically %LOCALAPPDATA%\Google\Chrome\User Data\Default\Extensions\)
    Affected if version is <= 1.0.6
  2. Check Firefox ActiveTouch plugin version
    In Firefox, navigate to about:addons, click on Plugins, locate the Cisco WebEx ActiveTouch plugin, and note the version. Alternatively, check the plugin DLL file version in the Firefox plugins directory
    Affected if version equals 105
  3. Check IE GpcContainer Class COM registration
    Open Windows Registry Editor (regedit), navigate to HKEY_CLASSES_ROOT\CLSID\ and search for GpcContainer Class. Check the Version subkey value, or right-click the DLL and select Properties to view the File Version
    Affected if version is <= 10031.6.2017.0125
  4. Check Cisco Download Manager version
    Open Programs and Features (appwiz.cpl) or the Add/Remove Programs control panel, locate Cisco Download Manager, and note the version. Alternatively, right-click the download manager executable (typically in Program Files\Cisco\Cisco WebEx\Download Manager\) and view Properties > Details
    Affected if version equals 2.1.0.9
  5. Verify browser extension is installed and active
    For each browser (Chrome, Firefox, IE), confirm the respective WebEx extension is present and enabled. In IE, also check Tools > Manage Add-ons to confirm GpcContainer Class is loaded
    Affected if any of the affected extensions are installed and enabled in the browser

You are affected if any Cisco WebEx browser extension (Chrome <=1.0.6, Firefox ActiveTouch =105, or IE GpcContainer <=10031.6.2017.0125) or Download Manager =2.1.0.9 is installed and active in your browsers.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Upgrade available Upgrade to a release after 10031.6.2017.0125
Interim mitigation

Update Cisco WebEx browser extensions to the fixed versions: Chrome to 1.0.7, Firefox ActiveTouch plugin to 106, IE GpcContainer Class to 10031.6.2017.0126, and IE Download Manager to 2.1.0.10.

Fix this in Activetouch General Plugin Container Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA2.0 h
18.0 hours of engineering $3,200
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2017-3823 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data