Zoom Workplace Apps and SDK for Windows: Download of Code Without Integrity Check
CVE-2024-39819 is a high-severity download of code without integrity check vulnerability in Zoom Workplace Apps and SDK for Windows from Zoom Communications, with a CVSS 3.1 base score of 7.3 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, but only if a user takes part, for example by opening a link or file. Affected Zoom Workplace Apps and SDK for Windows versions: see references. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.1% 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_rooms_app_for_windows to 5.17.13 or a later version.
- Update zoom_meeting_sdk_for_windows to 6.0.10 or a later version.
- Update workplace_desktop to 6.0.10 or a later version.
- Read the advisory on zoom.com for workarounds and exact fixed builds.
- Because the attack needs a user to take part, warn users about unexpected links and files related to this product until it is patched.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Zoom Communications | Zoom Workplace Apps and SDK for Windows | see references | Not stated |
| Zoom | zoom_rooms_app_for_windows | before 5.17.13 | 5.17.13 |
| Zoom | zoom_meeting_sdk_for_windows | before 6.0.10 | 6.0.10 |
| Zoom | workplace_desktop | before 6.0.10 | 6.0.10 |
| Zoom | Meeting Software Development Kit | before 6.0.10 | 6.0.10 |
| Zoom | Rooms | before 5.17.13 | 5.17.13 |
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
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- RequiredA user must take an action such as opening a file or link.
- 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:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 6.7 | Medium | CNA (zoom.us) |
| CVSS 3.1 | 7.3 | High | NVD |
Official description
Integrity check in the installer for some Zoom Workplace Apps and SDKs for Windows may allow an authenticated user to conduct a privilege escalation via local access.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Download of Code Without Integrity Check
The product downloads source code or an executable from a remote location and executes the code without sufficiently verifying the origin and integrity of the code.
How developers prevent this class of flaw
- Perform proper forward and reverse DNS lookups to detect DNS spoofing.
- Encrypt the code with a reliable encryption scheme before transmitting.
- Run your code using the lowest privileges that are required to accomplish the necessary tasks. If possible, create isolated accounts with limited privileges that are only used for a single task. That way, a successful attack will not immediately give the attacker access to the rest of the software or its environment. For example, database applications rarely need to run as the database administrator, especially in day-to-day operations.
More Download of Code Without Integrity Check vulnerabilities (CWE-494)
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 Download of Code Without Integrity Check vulnerabilities
- 9.8 Critical severity
- 7.5 High severity
- 8.8 High severity
- 7.5 High severity
- 8.8 High severity
- 9.6 Critical severity
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