CVE-2023-1257
MEDIUMCVSS 6.8/10EPSS 0.32%
Last modified
CVE-2023-1257 is a medium-severity vulnerability rated 6.8/10 on the CVSS scale. An attacker with physical access to the affected Moxa UC Series devices can initiate a restart of the device and gain access to its BIOS. Command line options can then be altered, allowing the attacker to access the terminal. EPSS estimates a 0.32% chance of exploitation in the next 30 days.
Description
An attacker with physical access to the affected Moxa UC Series devices can initiate a restart of the device and gain access to its BIOS. Command line options can then be altered, allowing the attacker to access the terminal. From the terminal, the attacker can modify the device’s authentication files to create a new user and gain full access to the system.
Metrics
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Moxa | Uc-2101-Lx Firmware | >= 1.3, <= 1.5 |
| Moxa | Uc-2102-Lx Firmware | >= 1.3, <= 1.5 |
| Moxa | Uc-2102-T-Lx Firmware | >= 1.3, <= 1.5 |
| Moxa | Uc-2104-Lx Firmware | >= 1.3, <= 1.5 |
| Moxa | Uc-2111-Lx Firmware | >= 1.3, <= 1.5 |
| Moxa | Uc-2112-Lx Firmware | >= 1.3, <= 1.5 |
| Moxa | Uc-2114-T-Lx Firmware | >= 1.3, <= 1.5 |
| Moxa | Uc-2114-T-Lx Firmware | All versions |
| Moxa | Uc-2116-T-Lx Firmware | >= 1.3, <= 1.5 |
| Moxa | Uc-3101-T-Ap-Lx Firmware | >= 1.2, <= 2.0 |
| Moxa | Uc-3101-T-Eu-Lx Firmware | >= 1.2, <= 2.0 |
| Moxa | Uc-3101-T-Us-Lx Firmware | >= 1.2, <= 2.0 |
| Moxa | Uc-3111-T-Ap-Lx Firmware | >= 1.2, <= 2.0 |
| Moxa | Uc-3111-T-Ap-Lx-Nw Firmware | >= 1.2, <= 2.0 |
| Moxa | Uc-3111-T-Eu-Lx Firmware | >= 1.2, <= 2.0 |
| Moxa | Uc-3111-T-Eu-Lx-Nw Firmware | >= 1.2, <= 2.0 |
| Moxa | Uc-3111-T-Us-Lx Firmware | >= 1.2, <= 2.0 |
| Moxa | Uc-3111-T-Us-Lx-Nw Firmware | >= 1.2, <= 2.0 |
| Moxa | Uc-3121-T-Ap-Lx Firmware | >= 1.2, <= 2.0 |
| Moxa | Uc-3121-T-Eu-Lx Firmware | >= 1.2, <= 2.0 |
| Moxa | Uc-3121-T-Us-Lx Firmware | >= 1.2, <= 2.0 |
| Moxa | Uc-5101-Lx Firmware | 1.2 |
| Moxa | Uc-5101-T-Lx Firmware | 1.2 |
| Moxa | Uc-5102-Lx Firmware | 1.2 |
| Moxa | Uc-5102-T-Lx Firmware | 1.2 |
| Moxa | Uc-5111-Lx Firmware | 1.2 |
| Moxa | Uc-5111-T-Lx Firmware | 1.2 |
| Moxa | Uc-5112-Lx Firmware | 1.2 |
| Moxa | Uc-5112-T-Lx Firmware | 1.2 |
| Moxa | Uc-8112-Lx Firmware | 1.2 |
| Moxa | Uc-8131-Lx Firmware | 1.2 |
| Moxa | Uc-8132-Lx Firmware | 1.2 |
| Moxa | Uc-8162-Lx Firmware | 1.2 |
| Moxa | Uc-8112-Me-T-Lx Firmware | >= 1.0, <= 1.1 |
| Moxa | Uc-8112-Me-T-Lx1 Firmware | >= 1.0, <= 1.1 |
| Moxa | Uc-8112a-Me-T-Lx Firmware | >= 1.0, <= 1.1 |
| Moxa | Uc-8210-T-Lx-S Firmware | >= 1.0, <= 2.4 |
| Moxa | Uc-8220-T-Lx Firmware | >= 1.0, <= 2.4 |
| Moxa | Uc-8220-T-Lx-Ap-S Firmware | >= 1.0, <= 2.4 |
| Moxa | Uc-8220-T-Lx-Eu-S Firmware | >= 1.0, <= 2.4 |
| Moxa | Uc-8220-T-Lx-S Firmware | >= 1.0, <= 2.4 |
| Moxa | Uc-8220-T-Lx-Us-S Firmware | >= 1.0, <= 2.4 |
| Moxa | Uc-8410a-Lx Firmware | 2.2 |
| Moxa | Uc-8410a-Nw-Lx Firmware | 2.2 |
| Moxa | Uc-8410a-Nw-T-Lx Firmware | 2.2 |
| Moxa | Uc-8410a-T-Lx Firmware | 2.2 |
| Moxa | Uc-8540-Lx Firmware | >= 1.0, <= 1.2 |
| Moxa | Uc-8540-T-Ct-Lx Firmware | >= 1.0, <= 1.2 |
| Moxa | Uc-8540-T-Lx Firmware | >= 1.0, <= 1.2 |
| Moxa | Uc-8580-Lx Firmware | 1.1 |
Showing 50 of 55 affected configurations. See NVD for the full list.
References
- https://www.cisa.gov/uscert/ics/advisories/icsa-22-333-04Third Party Advisory, US Government Resource
- https://www.cisa.gov/uscert/ics/advisories/icsa-22-333-04Third Party Advisory, US Government Resource
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2023-1257?
An attacker with physical access to the affected Moxa UC Series devices can initiate a restart of the device and gain access to its BIOS. Command line options can then be altered, allowing the attacker to access the terminal. From the terminal, the attacker can modify the device’s authentication files to create a new user and gain full access to the system.
How severe is CVE-2023-1257?
CVE-2023-1257 has a CVSS score of 6.8/10 (MEDIUM severity). The EPSS model estimates a 0.32% probability of exploitation in the next 30 days.
How do I fix CVE-2023-1257?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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Scan your code nowSource: NVD / NIST