dbcve.org
RoomosOperating system · Cisco

CVE-2023-20008

HIGH · 7.1 CVSS v3.1 Published 2023-01-20
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
73/100
Remediation priority · Elevated
Zero-click

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 the CLI of Cisco TelePresence CE and RoomOS Software could allow an authenticated, local attacker to overwrite arbitrary files on the local system of an affected device. This vulnerability is due to improper access controls on files that are in the local file system. An attacker could exploit this vulnerability by placing a symbolic link in a specific location on the local file system of an affected device. A successful exploit could allow the attacker to overwrite arbitrary files on the affected device.

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

A vulnerability in the CLI of Cisco TelePresence CE and RoomOS Software allows an authenticated, local attacker to overwrite arbitrary files on the device. This is due to improper access controls on local filesystem files. An attacker exploits this by placing a symbolic link in a specific location, enabling arbitrary file overwrite.

MitigationApply the vendor patch from Cisco's security advisory. Since exploitation requires authenticated local access, enforce strict access controls on device CLI and limit privileged access to trusted administrators only.

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
RoomosOperating system
Affected:= 10.3.2.0= 10.3.4.0= 10.8.2.5= 10.8.4.0= 10.11.3.0= 10.11.5.2= 10.15.3.0
Telepresence Collaboration EndpointApplication
Affected:= 8.0.0= 8.0.1= 8.1.0= 8.1.1= 8.2.0= 8.2.1= 8.2.2= 8.3.0= 8.3.1= 8.3.2= 8.3.3= 8.3.5
Telepresence TcApplication
Affected:= 7.3.5= 7.3.6= 7.3.7= 7.3.9= 7.3.13= 7.3.21

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
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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 installed RoomOS version
    Run 'xcommand SystemUnit Info' or check the version via the web interface under Home > System Information
    Affected if The displayed version matches any of these: 10.3.2.0, 10.3.4.0, 10.8.2.5, 10.8.4.0, 10.11.3.0, 10.11.5.2, 10.15.3.0
  2. Identify installed TelePresence Collaboration Endpoint version
    Run 'xcommand SystemUnit Info' or check the version in the system information page
    Affected if The displayed version matches any of these: 8.0.0, 8.0.1, 8.1.0, 8.1.1, 8.2.0, 8.2.1, 8.2.2, 8.3.0, 8.3.1, 8.3.2, 8.3.3, 8.3.5
  3. Identify installed TelePresence TC version
    Run 'xcommand SystemUnit Info' or check the version in the system information page
    Affected if The displayed version matches any of these: 7.3.5, 7.3.6, 7.3.7, 7.3.9, 7.3.13, 7.3.21
  4. Verify local CLI authentication is configured
    Check if local user accounts are enabled on the device via 'xcommand Authentication LocalList' or by reviewing CLI access settings in the web interface under Security > Local Users and Authentication
    Affected if Local user accounts or local authentication is enabled and the device is running an affected version
  5. Inspect for suspicious symlinks in writable directories
    From the CLI, run 'ls -la' on directories that allow file creation, looking for symlinks that may have been placed to redirect file writes to sensitive locations
    Affected if Unexpected symlinks exist in locations writable by authenticated CLI users on an affected version

The device is affected if it runs any of the listed versions AND has local CLI authentication enabled, allowing an authenticated attacker to place symlinks for arbitrary file overwrite.

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's security advisory. Since exploitation requires authenticated local access, enforce strict access controls on device CLI and limit privileged access to trusted administrators only.

Fix this in Roomos Scoped from the published advisory
  • Consultation3.0 h
  • Implementation4.0 h
  • Testing4.0 h
  • Review / QA2.0 h
13.0 hours of engineering $2,280
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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-2023-20008 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
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