Zoom (for Android, iOS, Linux, macOS, and…: Trust Boundary Violation
CVE-2023-28597 is a high-severity trust boundary violation vulnerability in Zoom (for Android, iOS, Linux, macOS, and Windows) from Zoom Video Communications, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited from the same local network by an unauthenticated attacker, without any action from a user. The record lists version 5.13.5 as the first without the flaw, so updating Zoom (for Android, iOS, Linux, macOS, and Windows) to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.52% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Zoom (for Android, iOS, Linux, macOS, and Windows) to 5.13.5 or a later version.
- Update Zoom Rooms (for Android, iOS, Linux, macOS, and Windows) to 5.13.5 or a later version.
- Update Zoom VDI for Windows to 5.13.10 or a later version.
- Read the advisory on explore.zoom.us for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Zoom Video Communications | Zoom (for Android, iOS, Linux, macOS, and Windows) | before 5.13.5 | 5.13.5 |
| Zoom Video Communications | Zoom Rooms (for Android, iOS, Linux, macOS, and Windows) | before 5.13.5 | 5.13.5 |
| Zoom Video Communications | Zoom VDI for Windows | before 5.13.10 | 5.13.10 |
| Zoom | Rooms | before 5.13.5 | 5.13.5 |
| Zoom | Zoom | before 5.13.5 | 5.13.5 |
| Zoom | Virtual Desktop Infrastructure | before 5.13.10 | 5.13.10 |
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
- AdjacentThe attacker must be on the same local network segment.
- Attack complexity
- HighSuccess depends on conditions outside the attacker's control.
- 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
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 8.3 | High | CNA (zoom.us) |
| CVSS 3.1 | 7.5 | High | NVD |
Official description
Zoom clients prior to 5.13.5 contain an improper trust boundary implementation vulnerability. If a victim saves a local recording to an SMB location and later opens it using a link from Zoom’s web portal, an attacker positioned on an adjacent network to the victim client could set up a malicious SMB server to respond to client requests, causing the client to execute attacker controlled executables. This could result in an attacker gaining access to a user's device and data, and remote code execution.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Trust Boundary Violation
The product mixes trusted and untrusted data in the same data structure or structured message.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Recent Trust Boundary Violation vulnerabilities
- 9.8 Critical severity
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