RG-UAC: Improper Neutralization of Special Elements used in an OS Command
CVE-2024-5338 is a high-severity improper neutralization of special elements used in an OS command vulnerability in RG-UAC from Ruijie, with a CVSS 3.1 base score of 7.2 out of 10. It can be exploited remotely over the network by an attacker with administrator privileges, without any action from a user. The record lists version 20240516 as the first without the flaw, so updating RG-UAC to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 7.87% chance of exploitation within 30 days, which is in the top 5.21% of all scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update RG-UAC to 20240516 or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Ruijie | RG-UAC | 20240516; before 20240516 | 20240516 |
| Ruijie | Rg-uac 6000-cc Firmware | Not specified in the record | Not stated |
| Ruijie | Rg-uac 6000-e10 Firmware | Not specified in the record | Not stated |
| Ruijie | Rg-uac 6000-e10c Firmware | Not specified in the record | Not stated |
| Ruijie | Rg-uac 6000-e20 Firmware | Not specified in the record | Not stated |
| Ruijie | Rg-uac 6000-e20c Firmware | Not specified in the record | Not stated |
| Ruijie | Rg-uac 6000-e20m Firmware | Not specified in the record | Not stated |
| Ruijie | Rg-uac 6000-e50 Firmware | Not specified in the record | Not stated |
| Ruijie | Rg-uac 6000-e50c Firmware | Not specified in the record | Not stated |
| Ruijie | Rg-uac 6000-e50m Firmware | Not specified in the record | Not stated |
| Ruijie | Rg-uac 6000-ea Firmware | Not specified in the record | Not stated |
| Ruijie | Rg-uac 6000-ei Firmware | Not specified in the record | Not stated |
| Ruijie | Rg-uac 6000-isg02 Firmware | Not specified in the record | Not stated |
| Ruijie | Rg-uac 6000-isg10 Firmware | Not specified in the record | Not stated |
| Ruijie | Rg-uac 6000-isg200 Firmware | Not specified in the record | Not stated |
| Ruijie | Rg-uac 6000-isg40 Firmware | Not specified in the record | Not stated |
| Ruijie | Rg-uac 6000-si Firmware | Not specified in the record | Not stated |
| Ruijie | Rg-uac 6000-u3100 Firmware | Not specified in the record | Not stated |
| Ruijie | Rg-uac 6000-u3210 Firmware | Not specified in the record | Not stated |
| Ruijie | Rg-uac 6000-x100 Firmware | Not specified in the record | Not stated |
| Ruijie | Rg-uac 6000-x100s Firmware | Not specified in the record | Not stated |
| Ruijie | Rg-uac 6000-x20 Firmware | Not specified in the record | Not stated |
| Ruijie | Rg-uac 6000-x200 Firmware | Not specified in the record | Not stated |
| Ruijie | Rg-uac 6000-x20m Firmware | Not specified in the record | Not stated |
| Ruijie | Rg-uac 6000-x20me Firmware | Not specified in the record | Not stated |
Version data comes from the organisation that assigned the CVE; 3 further products are omitted here. 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
- 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:L/PR:H/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 5.1 | Medium | CNA (vuldb.com) |
| CVSS 3.1 | 4.7 | Medium | CNA (vuldb.com) |
| CVSS 3.1 | 7.2 | High | NVD |
| CVSS 2.0 | 5.8 | Medium | CNA (vuldb.com) |
Official description
A vulnerability was found in Ruijie RG-UAC up to 20240516. It has been classified as critical. Affected is an unknown function of the file /view/vpn/autovpn/online.php. The manipulation of the argument peernode leads to os command injection. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-266244. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Neutralization of Special Elements used in an OS Command
The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command before it is sent to a downstream component.
How developers prevent this class of flaw
- If at all possible, use library calls rather than external processes to recreate the desired functionality.
- For any data that will be used to generate a command to be executed, keep as much of that data out of external control as possible. For example, in web applications, this may require storing the data locally in the session's state instead of sending it out to the client in a hidden form field.
- For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
More Improper Neutralization of Special Elements used in an OS Command vulnerabilities (CWE-78)
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
Third-party and government advisories
- vuldb.com/?id.266244Third Party Advisory, VDB Entry
- vuldb.com/?submit.336036Third Party Advisory, VDB Entry
Other references
- vuldb.com/?ctiid.266244Permissions Required, VDB Entry
Other vulnerabilities in RG-UAC
- 7.3 High severity
- 7.2 High severity
- 9.8 Critical severity
- 9.8 Critical severity
- 8.8 High severity
- 9.8 Critical severity
Recent Improper Neutralization of Special Elements used in an OS Command vulnerabilities
- 7.2 High severity
- 7.2 High severity
- 7.2 High severity
- 7.2 High severity
- 8.8 High severity
- 8.8 High severity
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