Overview
CVE-2025-61608 is a high-severity vulnerability identified in nr modems. This vulnerability stems from improper input validation and can be exploited by remote attackers to trigger a system crash, resulting in a denial-of-service (DoS) condition. No additional execution privileges are required for a successful exploit.
Technical Details
The vulnerability lies in the way the nr modem handles incoming data. Specifically, the modem fails to properly validate certain input parameters. An attacker can craft malicious input that exploits this lack of validation, leading to unexpected behavior within the modem’s processing logic. This then results in a system crash and DoS. The specific vulnerable code section is not publicly available due to vendor security policies, but the root cause is confirmed to be inadequate input sanitization.
CVSS Analysis
- Severity: HIGH
- CVSS Score: 7.5
A CVSS score of 7.5 indicates a significant risk. The ease of exploitation (remote, no privileges needed) contributes to the elevated score. A successful exploit renders the affected device unusable, impacting communication and potentially other dependent services.
Possible Impact
The primary impact of this vulnerability is a remote denial-of-service (DoS) condition. This means that an attacker can remotely crash the nr modem, preventing it from functioning correctly. This could lead to:
- Loss of connectivity for devices relying on the affected modem.
- Interruption of critical services that depend on network communication.
- Potential for widespread disruption if multiple devices are targeted simultaneously.
Mitigation or Patch Steps
The recommended mitigation is to apply the security patch provided by the modem vendor, Unisoc. Please refer to the official announcement for detailed instructions on obtaining and installing the patch:
- Check for firmware updates from your device manufacturer.
- Apply any available patches immediately.
- Monitor your systems for suspicious activity.
