VMware Carbon Black App Control (AppC): Unrestricted Upload of File with Dangerous Type
CVE-2022-22952 is a critical-severity unrestricted upload of file with dangerous type vulnerability in VMware Carbon Black App Control (AppC), with a CVSS 3.1 base score of 9.1 out of 10. It can be exploited remotely over the network by an attacker with administrator privileges, without any action from a user. There is no confirmed exploitation so far. EPSS estimates a 1.51% chance of exploitation within 30 days, higher than 75% of scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update Carbon Black App Control to 8.5.14 or 8.6.6 or 8.7.4 or 8.8.2, whichever matches your release line, or a later version.
- Read the advisory on vmware.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| VMware Carbon Black App Control (AppC) | VMware Carbon Black App Control (AppC) | Not specified in the record | Not stated |
| VMware | Carbon Black App Control | 8.5 up to, but not including, 8.5.14; 8.6 up to, but not including, 8.6.6; 8.7.0 up to, but not including, 8.7.4; 8.8.0 up to, but not including, 8.8.2 | 8.5.14, 8.6.6, 8.7.4, 8.8.2 |
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
- HighAdministrator-level access is required first.
- User interaction
- NoneNo action by a victim is required.
- Scope
- ChangedThe attack can reach beyond the vulnerable component into other systems.
- 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:L/PR:H/UI:N/S:C/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 9.1 | Critical | NVD |
| CVSS 2.0 | 9.0 | High | NVD |
Official description
VMware Carbon Black App Control (8.5.x prior to 8.5.14, 8.6.x prior to 8.6.6, 8.7.x prior to 8.7.4 and 8.8.x prior to 8.8.2) contains a file upload vulnerability. A malicious actor with administrative access to the VMware App Control administration interface may be able to execute code on the Windows instance where AppC Server is installed by uploading a specially crafted file.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Unrestricted Upload of File with Dangerous Type
The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.
How developers prevent this class of flaw
- Generate a new, unique filename for an uploaded file instead of using the user-supplied filename, so that no external input is used at all.
- When the set of acceptable objects, such as filenames or URLs, is limited or known, create a mapping from a set of fixed input values (such as numeric IDs) to the actual filenames or URLs, and reject all other inputs.
- Consider storing the uploaded files outside of the web document root entirely. Then, use other mechanisms to deliver the files dynamically.
More Unrestricted Upload of File with Dangerous Type vulnerabilities (CWE-434)
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Other vulnerabilities in VMware Carbon Black App Control (AppC)
- 9.1 Critical severity
Recent Unrestricted Upload of File with Dangerous Type vulnerabilities
- 9.8 Critical severity
- 9.8 Critical severity
- 8.8 High severity
- 7.8 High severity
- 8.8 High severity
- 9.8 Critical severity
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