HPE OfficeConnect 1820 and 1850 Switch Series: Improper Limitation of a Pathname to a Restricted Directory
CVE-2022-37934 is a high-severity improper limitation of a pathname to a restricted directory vulnerability in HPE OfficeConnect 1820 and 1850 Switch Series from Hewlett Packard Enterprise, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected HPE OfficeConnect 1820 and 1850 Switch Series versions: Prior to PT.02.17; Prior to PC.01.23; Prior to PO.01.22. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 1.88% chance of exploitation within 30 days, higher than 80% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Officeconnect 1820 24g Poe+ (185w) Switch J9983a Firmware to pt.02.17 or a later version.
- Update Officeconnect 1820 48g Poe+ (370w) Switch J9984a Firmware to pt.02.17 or a later version.
- Update Officeconnect 1820 8g Poe+ (65w) Switch J9982a Firmware to pt.02.17 or a later version.
- Read the advisory on support.hpe.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
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
- 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
- NoneNothing can be modified.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 6.8 | Medium | CNA (hpe.com) |
| CVSS 3.1 | 7.5 | High | NVD |
Official description
A potential security vulnerability has been identified in HPE OfficeConnect 1820, and 1850 switch series. The vulnerability could be remotely exploited to allow remote directory traversal in HPE OfficeConnect 1820 switch series version PT.02.17 and below, HPE OfficeConnect 1850 switch series version PC.01.23 and below, and HPE OfficeConnect 1850 (10G aggregator) switch version PO.01.22 and below.
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.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Recent Improper Limitation of a Pathname to a Restricted Directory vulnerabilities
- 7.2 High severity
- 7.8 High severity
- 7.5 High severity
- 7.5 High severity
- 8.8 High severity
- 9.8 Critical severity
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