Zoom Client for Meetings for Android: Reliance on Cookies without Validation and Integrity Checking
CVE-2022-22785 is a critical-severity reliance on cookies without validation and integrity checking vulnerability in Zoom Client for Meetings for Android from Zoom Video Communications, with a CVSS 3.1 base score of 9.1 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, 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 3.52% chance of exploitation within 30 days, higher than 89% of scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update Zoom Client for Meetings for Android to 5.10.0 or a later version.
- Update Zoom Client for Meetings for iOS to 5.10.0 or a later version.
- Update Zoom Client for Meetings for Linux to 5.10.0 or a later version.
- Read the advisory on explore.zoom.us for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Zoom Video Communications | Zoom Client for Meetings for Android | before 5.10.0 | 5.10.0 |
| Zoom Video Communications | Zoom Client for Meetings for iOS | before 5.10.0 | 5.10.0 |
| Zoom Video Communications | Zoom Client for Meetings for Linux | before 5.10.0 | 5.10.0 |
| Zoom Video Communications | Zoom Client for Meetings for MacOS | before 5.10.0 | 5.10.0 |
| Zoom Video Communications | Zoom Client for Meetings for Windows | before 5.10.0 | 5.10.0 |
| Zoom | Meetings | before 5.10.0 | 5.10.0 |
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
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- 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
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 5.9 | Medium | CNA (zoom.us) |
| CVSS 3.1 | 9.1 | Critical | NVD |
| CVSS 2.0 | 6.4 | Medium | NVD |
Official description
The Zoom Client for Meetings (for Android, iOS, Linux, MacOS, and Windows) before version 5.10.0 failed to properly constrain client session cookies to Zoom domains. This issue could be used in a more sophisticated attack to send an unsuspecting users Zoom-scoped session cookies to a non-Zoom domain. This could potentially allow for spoofing of a Zoom user.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Reliance on Cookies without Validation and Integrity Checking
The product relies on the existence or values of cookies when performing security-critical operations, but it does not properly ensure that the setting is valid for the associated user.
How developers prevent this class of flaw
- Avoid using cookie data for a security-related decision.
- Perform thorough input validation (i.e.: server side validation) on the cookie data if you're going to use it for a security related decision.
- Add integrity checks to detect tampering.
More Reliance on Cookies without Validation and Integrity Checking vulnerabilities (CWE-565)
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Other vulnerabilities in Zoom Client for Meetings for Android
- 7.5 High severity
- 8.1 High severity
Recent Reliance on Cookies without Validation and Integrity Checking vulnerabilities
- 7.2 High severity
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