Overview
CVE-2025-3012 is a high-severity vulnerability affecting Unisoc’s dpc modem. This vulnerability allows a remote attacker to trigger a system crash leading to a denial-of-service (DoS) condition. The root cause is a null pointer dereference within the dpc modem’s software. Exploitation of this vulnerability does not require any additional execution privileges.
Technical Details
The vulnerability resides in the dpc modem component of Unisoc chipsets. A specifically crafted input or network condition can lead to a null pointer being dereferenced during operation. When the modem attempts to access memory at address zero (or a null address), it triggers a system exception, resulting in a crash. The specific function or code path where this occurs isn’t publicly detailed, but the core issue is confirmed as a null pointer dereference. Further research and reverse engineering may be needed to pinpoint the exact location for exploitation analysis.
CVSS Analysis
The Common Vulnerability Scoring System (CVSS) provides a standardized way to assess the severity of vulnerabilities. CVE-2025-3012 has been assigned a CVSS score of 7.5, indicating a high severity rating.
- Base Score: 7.5
- Attack Vector: Network (AV:N)
- Attack Complexity: Low (AC:L)
- Privileges Required: None (PR:N)
- User Interaction: None (UI:N)
- Scope: Unchanged (S:U)
- Confidentiality Impact: None (C:N)
- Integrity Impact: None (I:N)
- Availability Impact: High (A:H)
This score reflects the ease of exploitation and the significant impact on availability (DoS).
Possible Impact
The successful exploitation of CVE-2025-3012 results in a remote denial-of-service condition. This can manifest as:
- Loss of connectivity for devices using the affected Unisoc modem.
- System instability and potential reboots.
- Disruption of critical services reliant on the modem for communication.
Given the remote nature and lack of required privileges, the potential impact is widespread and can affect numerous devices and users.
Mitigation or Patch Steps
The primary mitigation for CVE-2025-3012 is to apply the security patch provided by Unisoc. Please refer to the official Unisoc security advisory for specific instructions and firmware updates. End-users should contact their device manufacturers for firmware updates incorporating the patch. Network administrators can also implement traffic filtering and monitoring to detect and potentially block malicious traffic targeting this vulnerability, although this may not be a complete solution.
