SyroTech SY-GPON-1110-WDONT router: On-Chip Debug and Test Interface With Improper Access Control
CVE-2024-41692 is a high-severity on-chip debug and test interface with improper access control vulnerability in SyroTech SY-GPON-1110-WDONT router from SyroTech, with a CVSS 4.0 base score of 8.6 out of 10. It can be exploited with physical access to the device by an unauthenticated attacker, without any action from a user. Affected SyroTech SY-GPON-1110-WDONT router versions: 3.1.02-231102. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.27% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of SyroTech SY-GPON-1110-WDONT router you run against the affected versions below, and install the vendor's latest release.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| SyroTech | SyroTech SY-GPON-1110-WDONT router | 3.1.02-231102 | Not stated |
| Syrotech | sy-gpon-1110-wdont_firmware | 3.1.02-231102 | 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
- PhysicalThe attacker must physically touch the device.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Attack requirements
- NoneThe attack does not depend on a particular deployment or configuration.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Confidentiality (vulnerable system)
- HighSerious loss of confidentiality on the vulnerable system.
- Integrity (vulnerable system)
- HighSerious loss of integrity on the vulnerable system.
- Availability (vulnerable system)
- HighSerious loss of availability on the vulnerable system.
- Confidentiality (other systems)
- HighSerious loss of confidentiality on systems beyond the vulnerable one.
- Integrity (other systems)
- HighSerious loss of integrity on systems beyond the vulnerable one.
- Availability (other systems)
- HighSerious loss of availability on systems beyond the vulnerable one.
Vector: CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. Scored by CNA (cert-in.org.in).
Official description
This vulnerability exists in SyroTech SY-GPON-1110-WDONT Router due to presence of root terminal access on a serial interface without proper access control. An attacker with physical access could exploit this by accessing the root shell on the vulnerable system. Successful exploitation of this vulnerability could allow the attacker to execute arbitrary commands with root privileges on the targeted system.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: On-Chip Debug and Test Interface With Improper Access Control
The chip does not implement or does not correctly perform access control to check whether users are authorized to access internal registers and test modes through the physical debug/test interface.
How developers prevent this class of flaw
- If feasible, the manufacturer should disable the JTAG interface or implement authentication and authorization for the JTAG interface. If authentication logic is added, it should be resistant to timing attacks. Security-sensitive data stored in registers, such as keys, etc. should be cleared when entering debug mode.
More On-Chip Debug and Test Interface With Improper Access Control vulnerabilities (CWE-1191)
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
Other references
Other vulnerabilities in SyroTech SY-GPON-1110-WDONT router
- 7.5 High severity
- 7.5 High severity
Recent On-Chip Debug and Test Interface With Improper Access Control vulnerabilities
- 7.2 High severity
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