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Webex Business SuiteApplication · Cisco

CVE-2018-0104

CRITICAL · 9.6 CVSS v3.0 Published 2018-01-04
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
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
A vulnerability in Cisco WebEx Network Recording Player for Advanced Recording Format (ARF) files could allow a remote attacker to execute arbitrary code on the system of a targeted user. The attacker could exploit this vulnerability by sending the user a link or email attachment with a malicious ARF file and persuading the user to follow the link or launch the file. Successful exploitation could allow the attacker to execute arbitrary code on the user's system. This vulnerability affects Cisco WebEx Business Suite meeting sites, Cisco WebEx Meetings sites, Cisco WebEx Meetings Server, and Cisco WebEx ARF players. Cisco Bug IDs: CSCvg78853, CSCvg78856, CSCvg78857.

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 · moderate confidence

A vulnerability exists in Cisco WebEx Network Recording Player's handling of Advanced Recording Format (ARF) files. By crafting a malicious ARF file and tricking a user into opening it (via link or email attachment), an attacker can trigger arbitrary code execution on the victim's system. This client-side code execution vulnerability affects multiple WebEx product lines.

MitigationApply the vendor patch from Cisco for the affected WebEx products, and educate users to avoid opening untrusted ARF files from unknown sources.

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
Webex Business SuiteApplication
Affected:all versions
Webex MeetingsApplication
Affected:all versions
Webex Meetings ServerApplication
Affected:all versions
Webex Network Recording PlayerApplication
Affected:all versions

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
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/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. Identify WebEx Network Recording Player installation
    Search for the WebEx Network Recording Player application in system program directories or check Add/Remove Programs for Cisco WebEx recording player entries
    Affected if The application is present on the system (all versions are affected)
  2. Detect WebEx client software installations
    Review installed programs for Cisco WebEx Business Suite, Cisco WebEx Meetings, or Cisco WebEx Meetings Server
    Affected if Any of these WebEx client products are installed (all versions are affected)
  3. Verify ARF file handler registration
    Check system file type associations for .arf extension pointing to WebEx recording player
    Affected if The .arf file type is associated with WebEx player, indicating the vulnerable component can be invoked
  4. Confirm WebEx components in system
    Search for WebEx-related executable files or DLLs in common installation paths (such as Program Files/Cisco/WebEx)
    Affected if WebEx executables related to network recording playback exist on the system

If any WebEx client software or the Network Recording Player is installed on the system, the environment is vulnerable when users open malicious ARF files.

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
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply the vendor patch from Cisco for the affected WebEx products, and educate users to avoid opening untrusted ARF files from unknown sources.

Fix this in Webex Business Suite Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA1.0 h
10.0 hours of engineering $1,750
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Scan for this in your stack

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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-2018-0104 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