CyberSecBulletin
CVE-2022-22787NVD status: Modified

Zoom Client for Meetings for Android: Improper Certificate Validation

Published Updated By the CyberSecBulletin desk

CVE-2022-22787 is a high-severity improper certificate validation vulnerability in Zoom Client for Meetings for Android from Zoom Video Communications, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. The record lists version 5.10.0 as the first without the flaw, so updating Zoom Client for Meetings for Android to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 3.69% chance of exploitation within 30 days, higher than 90% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Zoom Client for Meetings for Android to 5.10.0 or a later version.
  2. Update Zoom Client for Meetings for iOS to 5.10.0 or a later version.
  3. Update Zoom Client for Meetings for Linux to 5.10.0 or a later version.
  4. Read the advisory on explore.zoom.us for workarounds and exact fixed builds.

Affected products and versions

VendorProductAffected versionsFixed in
Zoom Video CommunicationsZoom Client for Meetings for Androidbefore 5.10.05.10.0
Zoom Video CommunicationsZoom Client for Meetings for iOSbefore 5.10.05.10.0
Zoom Video CommunicationsZoom Client for Meetings for Linuxbefore 5.10.05.10.0
Zoom Video CommunicationsZoom Client for Meetings for MacOSbefore 5.10.05.10.0
Zoom Video CommunicationsZoom Client for Meetings for Windowsbefore 5.10.05.10.0
ZoomMeetingsbefore 5.10.05.10.0

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
HighSuccess depends on conditions outside the attacker's control.
Privileges required
LowA basic user account is enough.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 3.15.9MediumCNA (zoom.us)
CVSS 3.17.5HighNVD
CVSS 2.06.0MediumNVD

Official description

The Zoom Client for Meetings (for Android, iOS, Linux, macOS, and Windows) before version 5.10.0 fails to properly validate the hostname during a server switch request. This issue could be used in a more sophisticated attack to trick an unsuspecting users client to connect to a malicious server when attempting to use Zoom services.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Improper Certificate Validation

The product does not validate, or incorrectly validates, a certificate.

How developers prevent this class of flaw

  • Certificates should be carefully managed and checked to assure that data are encrypted with the intended owner's public key.
  • If certificate pinning is being used, ensure that all relevant properties of the certificate are fully validated before the certificate is pinned, including the hostname.

More Improper Certificate Validation vulnerabilities (CWE-295)

Timeline

  1. CVE record published.
  2. Record last changed materially (score, affected products, status or references).

References

Third-party and government advisories

Other vulnerabilities in Zoom Client for Meetings for Android

All Zoom Client for Meetings for Android vulnerabilities

Recent Improper Certificate Validation vulnerabilities

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