CENTUM CS 3000: Improper Limitation of a Pathname to a Restricted Directory
CVE-2022-21177 is a high-severity improper limitation of a pathname to a restricted directory vulnerability in CENTUM CS 3000 from Yokogawa Electric, with a CVSS 3.1 base score of 8.1 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. Affected CENTUM CS 3000 versions: versions from R3.08.10 to R3.09.00. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.94% chance of exploitation within 30 days, higher than 61% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Centum Vp Firmware to r6.09.00 or a later version.
- Update Centum Vp Entry Firmware to r6.09.00 or a later version.
- Read the advisory on web-material3.yokogawa.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Yokogawa Electric | CENTUM CS 3000 | versions from R3.08.10 to R3.09.00 | Not stated |
| Yokogawa Electric | CENTUM VP | versions from R4.01.00 to R4.03.00; versions from R5.01.00 to R5.04.20; versions from R6.01.00 to R6.08.00 | Not stated |
| Yokogawa Electric | Exaopc | versions from R3.72.00 to R3.79.00 | Not stated |
| Yokogawa | Centum Cs 3000 Firmware | r3.08.10 through r3.09.00 | Not stated |
| Yokogawa | Centum Cs 3000 Entry Firmware | r3.08.10 through r3.09.00 | Not stated |
| Yokogawa | Centum Vp Firmware | r4.01.00 through r4.03.00; r5.01.00 through r5.04.20; r6.01.00 up to, but not including, r6.09.00 | r6.09.00 |
| Yokogawa | Centum Vp Entry Firmware | r4.01.00 through r4.03.00; r5.01.00 through r5.04.20; r6.01.00 up to, but not including, r6.09.00 | r6.09.00 |
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
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- NoneNo data is disclosed.
- 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:L/UI:N/S:U/C:N/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 8.1 | High | NVD |
| CVSS 2.0 | 4.9 | Medium | NVD |
Official description
There is a path traversal vulnerability in CAMS for HIS Log Server contained in the following Yokogawa Electric products: CENTUM CS 3000 versions from R3.08.10 to R3.09.00, CENTUM VP versions from R4.01.00 to R4.03.00, from R5.01.00 to R5.04.20, andfrom R6.01.00 to R6.08.00, Exaopc versions from R3.72.00 to R3.79.00.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Limitation of a Pathname to a Restricted Directory
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
How developers prevent this class of flaw
- 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.
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
- Use an application firewall that can detect attacks against this weakness. It can be beneficial in cases in which the code cannot be fixed (because it is controlled by a third party), as an emergency prevention measure while more comprehensive software assurance measures are applied, or to provide defense in depth.
More Improper Limitation of a Pathname to a Restricted Directory vulnerabilities (CWE-22)
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Other vulnerabilities in CENTUM CS 3000
- 8.5 High severity
- 7.8 High severity
- 8.8 High severity
- 8.1 High severity
- 7.8 High severity
- 8.1 High severity
Recent Improper Limitation of a Pathname to a Restricted Directory vulnerabilities
- 7.5 High severity
- 8.8 High severity
- 7.5 High severity
- 8.8 High severity
- 8.1 High severity
- 7.5 High severity
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