Home/CVE/In the Zoom Client through 4.4.4 and RingCentral 7.0.136380.0312 on macOS, remote attackers can force a user to join a v
CVE

CVE-2019-13450

In the Zoom Client through 4.4.4 and RingCentral 7.0.136380.0312 on macOS, remote attackers can force a user to join a v

In the Zoom Client through 4.4.4 and RingCentral 7.0.136380.0312 on macOS, remote attackers can force a user to join a video call with the video camera active. This occurs because any web site can interact with the Zoom web server on localhost port 19421 or 19424. NOTE: a machine remains vulnerable if the Zoom Client was installed in the past and then uninstalled.

Blocking exploitation requires additional steps, such as the ZDisableVideo preference and/or killing the web server, deleting the ~/.zoomus directory, and creating a ~/.zoomus plain file.

MEDIUM · CVSS 6.5 EPSS 0.01162
Schedule remediation
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-862Missing Authorization
▤

Affected Products & Versions

2
ringcentralall versions
zoom<= 4.4.4
⚠

Public Exploits & PoCs

1
pocbugs.chromium.org · detail?id=951540bugs.chromium.org
◈

Detection Rules (IDS/IPS)

1
et-openET EXPLOIT Possible Zoom Client Auto-Join (CVE-2019-13450)attempted-user
Open rulesets (ET Open, Snort Community, abuse.ch) link to source. Commercial rulesets are reference-only.
▣

Scoring & Timeline

6.5
MEDIUM · CVSS v3.0 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD09 Jul 2019 · 06:15 AM
CVSS VectorCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
🔗

References & Sources

7
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.securityfocus.com/bid/109082Third Party AdvisoryVDB Entry
https://assets.zoom.us/docs/pdf/Zoom+Response+Video-On+Vulnerability.pdfVendor Advisory
https://blog.zoom.us/wordpress/2019/07/08/response-to-video-on-concern/Vendor Advisory
https://medium.com/%40jonathan.leitschuh/zoom-zero-day-4-million-webcams-maybe-an-rce-just-get-them-to-visit-your-website-ac75c83f4ef5
https://news.ycombinator.com/item?id=20387298Issue TrackingThird Party Advisory
https://twitter.com/moreati/status/1148548799813640193Third Party Advisory
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