CVE-2021-25480 : What You Need to Know

A lack of replay attack protection in GUTI REALLOCATION COMMAND message process in Qualcomm modem prior to SMR Oct-2021 Release 1 can lead to remote denial of service on mobile network connection.

Understanding CVE-2021-25480

This CVE affects Samsung Mobile Devices and is related to a lack of replay attack protection in Qualcomm modem.

What is CVE-2021-25480?

CVE-2021-25480 is a vulnerability in Qualcomm modem that can be exploited to cause a denial of service on mobile network connections due to a lack of replay attack protection.

The Impact of CVE-2021-25480

The vulnerability has a CVSS base score of 4.4, with a medium severity level. It can result in a high impact on availability, requiring high privileges to exploit.

Technical Details of CVE-2021-25480

This section dives into the specific technical details of the CVE.

Vulnerability Description

The vulnerability arises from a lack of replay attack protection in the GUTI REALLOCATION COMMAND message process in Qualcomm modem.

Affected Systems and Versions

Samsung Mobile Devices with versions prior to SMR Oct-2021 Release 1 are impacted. Specifically, versions O(8.1), P(9.0), Q(10.0), R(11.0) are at risk.

Exploitation Mechanism

The vulnerability can be exploited remotely to cause a denial of service on mobile network connections by leveraging the lack of replay attack protection.

Mitigation and Prevention

To address CVE-2021-25480, certain steps can be taken to mitigate the risk and prevent exploitation.

Immediate Steps to Take

Immediate actions include applying security patches and updates provided by Samsung Mobile to protect affected devices.

Long-Term Security Practices

Implementing strong network security measures and staying updated on security advisories are essential for long-term protection against such vulnerabilities.

Patching and Updates

Regularly checking for and applying security patches and updates released by Samsung Mobile can help in staying protected from CVE-2021-25480.