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Webex Business SuiteApplication · Cisco

CVE-2018-0103

HIGH · 7.8 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 →
81/100
Remediation priority · High
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 Buffer Overflow vulnerability in Cisco WebEx Network Recording Player for Advanced Recording Format (ARF) files could allow a local attacker to execute arbitrary code on the system of a 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: CSCvg78835, CSCvg78837, CSCvg78839.

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

Buffer overflow vulnerability in Cisco WebEx Network Recording Player when processing maliciously crafted Advanced Recording Format (ARF) files. Successful exploitation allows arbitrary code execution on the victim's system through a specially designed ARF file delivered via link or email attachment.

MitigationUsers should not open ARF files from untrusted sources. Organizations should apply Cisco's patches for affected WebEx products and implement email filtering/user awareness training to mitigate social engineering vectors.

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
Local
Complexity
Low
Privileges
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.0/AV:L/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. Identify if Cisco WebEx Network Recording Player is installed
    Check for the player installation on Windows: look for 'Webex Network Recording Player' or 'Cisco WebEx' in Add/Remove Programs, Program Files, or check for the executable (typically atpplay.exe or similar WebEx player binaries). On Mac, check /Applications for WebEx-related packages.
    Affected if The Network Recording Player component is present on the system.
  2. Verify ARF file handling capability
    Check if .arf file extension is associated with the WebEx player. Look in Windows Registry under HKCR\.arf or check file associations, or on Mac check ~/Library/Application Support/WebEx for ARF-related components.
    Affected if The system has .arf file associations configured for the WebEx player.
  3. Check installed WebEx player version
    Right-click the player executable, select Properties, then Details to view version information. Alternatively, open the WebEx player and look in Help > About. For Windows installations, also check the Windows installer entry in Add/Remove Programs for version details.
    Affected if Any version of the Cisco WebEx Network Recording Player is found, since all versions are affected per the advisory.
  4. Check for presence of related WebEx client software
    Search for WebEx client installations: look for 'Cisco WebEx Meeting Manager', 'Webex' in installed programs, or check for process executables (atcli.exe, webex.exe, webexmta.exe) in system processes or Program Files.
    Affected if Any Cisco WebEx client software (Business Suite, Meetings, Meetings Server) with Network Recording Player functionality is installed.

The environment is affected if Cisco WebEx Network Recording Player or any associated WebEx client with ARF playback capability is installed, regardless of version, since all versions are listed as vulnerable.

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

Users should not open ARF files from untrusted sources. Organizations should apply Cisco's patches for affected WebEx products and implement email filtering/user awareness training to mitigate social engineering vectors.

Fix this in Webex Business Suite Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA2.0 h
20.0 hours of engineering $3,500
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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-2018-0103 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