LR350: Authorization Bypass Through User-Controlled Key
CVE-2024-10654 is a critical-severity authorization bypass through user-controlled key vulnerability in LR350 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 LR350 versions: 9.3.5u.6369. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 1.55% chance of exploitation within 30 days, higher than 76% of scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Check which version of LR350 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 | LR350 | 9.3.5u.6369 | Not stated |
| TOTOLINK | Lr350 Firmware | 9.3.5u.6369_b20220309 | 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 | 6.9 | Medium | CNA (vuldb.com) |
| CVSS 3.1 | 5.3 | Medium | CNA (vuldb.com) |
| CVSS 3.1 | 9.1 | Critical | NVD |
| CVSS 2.0 | 5.0 | Medium | CNA (vuldb.com) |
Official description
A vulnerability has been found in TOTOLINK LR350 up to 9.3.5u.6369 and classified as critical. Affected by this vulnerability is an unknown functionality of the file /formLoginAuth.htm. The manipulation of the argument authCode with the input 1 leads to authorization bypass. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 9.3.5u.6698_B20230810 is able to address this issue. It is recommended to upgrade the affected component.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Authorization Bypass Through User-Controlled Key
The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.
How developers prevent this class of flaw
- For each and every data access, ensure that the user has sufficient privilege to access the record that is being requested.
- Make sure that the key that is used in the lookup of a specific user's record is not controllable externally by the user or that any tampering can be detected.
- Use encryption in order to make it more difficult to guess other legitimate values of the key or associate a digital signature with the key so that the server can verify that there has been no tampering.
More Authorization Bypass Through User-Controlled Key vulnerabilities (CWE-639)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: yes, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- vuldb.com/?id.282667Third Party Advisory, VDB Entry
- vuldb.com/?submit.434801Third Party Advisory, VDB Entry
Technical write-ups (may include proof of concept)
- github.com/c0nyy/IoT_vuln/blob/main/TOTOLINK%20LR350%20Vuln.mdExploit, Third Party Advisory
Other references
- vuldb.com/?ctiid.282667Permissions Required, VDB Entry
- totolink.net/Product
- totolink.net/home/menu/detail/menu_listtpl/download/id/231/ids/36.htmlProduct
Other vulnerabilities in LR350
- 8.8 High severity
- 8.8 High severity
- 8.8 High severity
- 8.8 High severity
- 8.8 High severity
- 8.8 High severity
Recent Authorization Bypass Through User-Controlled Key vulnerabilities
- 9.8 Critical severity
- 7.5 High severity
- 8.1 High severity
- 9.8 Critical severity
- 7.5 High severity
- 8.8 High severity
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