PT-2019-13341 · Ringcentral+1 · Ringcentral+1

Published 2019-07-09 · Updated 2020-08-24 · CVE-2019-13450

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Zoom Client versions prior to 4.4.4 RingCentral version 7.0.136380.0312

Description The issue allows remote attackers to force a user to join a video call with the video camera active. This is possible because any website can interact with the Zoom web server on localhost port 19421 or 19424. A machine remains vulnerable even if the Zoom Client was installed and then uninstalled.

Recommendations For Zoom Client versions prior to 4.4.4, to block exploitation, set the ZDisableVideo preference and/or kill the web server, delete the ~/.zoomus directory, and create a ~/.zoomus plain file. For RingCentral version 7.0.136380.0312, at the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

CVE-2019-13450

Affected Products

Ringcentral

Zoom Client

References · 11

• 🔥 https://bugs.chromium.org/p/chromium/issues/detail?id=951540 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2019-13450 · Security Note
• https://assets.zoom.us/docs/pdf/Zoom+Response+Video-On+Vulnerability.pdf · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-13450 · Vendor Advisory
• https://blog.zoom.us/wordpress/2019/07/08/response-to-video-on-concern · Vendor Advisory
• https://news.ycombinator.com/item?id=20387298 · Note
• https://twitter.com/zoom_us/status/1148710712241295361 · Note
• https://t.me/avleonovcom/599 · Telegram Post
• https://medium.com/%40jonathan.leitschuh/zoom-zero-day-4-million-webcams-maybe-an-rce-just-get-them-to-visit-your-website-ac75c83f4ef5 · Note
• http://securityfocus.com/bid/109082 · Note
• https://twitter.com/moreati/status/1148548799813640193 · Note