T8: Missing Authorization
CVE-2024-0569 is a critical-severity missing authorization vulnerability in T8 from TOTOLINK, with a CVSS 3.1 base score of 9.1 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected T8 versions: 4.1.5cu.833_20220905. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.95% chance of exploitation within 30 days, higher than 62% of scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Check which version of T8 you run against the affected versions below, and install the vendor's latest release.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| TOTOLINK | T8 | 4.1.5cu.833_20220905 | Not stated |
| TOTOLINK | T8 Firmware | 4.1.5cu.833_20220905 | Not stated |
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
- HighData or code can be modified at will.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 5.3 | Medium | CNA (vuldb.com) |
| CVSS 3.1 | 4.3 | Medium | CNA (vuldb.com) |
| CVSS 3.1 | 9.1 | Critical | NVD |
| CVSS 2.0 | 4.0 | Medium | CNA (vuldb.com) |
Official description
A vulnerability classified as problematic has been found in Totolink T8 4.1.5cu.833_20220905. This affects the function getSysStatusCfg of the file /cgi-bin/cstecgi.cgi of the component Setting Handler. The manipulation of the argument ssid/key leads to information disclosure. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 4.1.5cu.862_B20230228 is able to address this issue. It is recommended to upgrade the affected component. The identifier VDB-250785 was assigned to this vulnerability.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Missing Authorization
The product does not perform an authorization check when an actor attempts to access a resource or perform an action.
How developers prevent this class of flaw
- Divide the product into anonymous, normal, privileged, and administrative areas. Reduce the attack surface by carefully mapping roles with data and functionality. Use role-based access control (RBAC) to enforce the roles at the appropriate boundaries. Note that this approach may not protect against horizontal authorization, i.e., it will not protect a user from attacking others with the same role.
- Ensure that access control checks are performed related to the business logic. These checks may be different than the access control checks that are applied to more generic resources such as files, connections, processes, memory, and database records. For example, a database may restrict access for medical records to a specific database user, but each record might only be intended to be accessible to the patient and the patient's doctor.
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, consider using authorization frameworks such as the JAAS Authorization Framework and the OWASP ESAPI Access Control feature.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- vuldb.com/?ctiid.250785Permissions Required, Third Party Advisory, VDB Entry
- vuldb.com/?id.250785Third Party Advisory, VDB Entry
- vuldb.com/?submit.263653Third Party Advisory, VDB Entry
- chtsecurity.com/news/8aa31e69-1e7c-4186-8554-7d5d6baeaa84Third Party Advisory
- chtsecurity.com/news/8f270890-12cc-4623-99a3-a81e00758c29Third Party Advisory
Technical write-ups (may include proof of concept)
- drive.google.com/file/d/1WSWrGEKUkvPk8hq1VRng-wbR7T6CknGY/view?usp=sharingExploit, Third Party Advisory
Recent Missing Authorization vulnerabilities
- 9.1 Critical severity
- 8.3 High severity
- 7.5 High severity
- 8.1 High severity
- 9.8 Critical severity
- 7.5 High severity
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