Learn about CVE-2021-3615, a code execution vulnerability in Lenovo Smart Camera X3, X5, and C2E firmware. Discover impact, affected systems, and mitigation steps.
A vulnerability was reported in Lenovo Smart Camera X3, X5, and C2E that allows code execution if a specific file exists on the attached SD card. This vulnerability has a CVSS base score of 6.6 (Medium severity) and affects Lenovo Smart Camera firmware versions lower than 01.03.29.16. It is categorized under CWE-94 - Improper Control of Generation of Code ('Code Injection').
Understanding CVE-2021-20657
This section provides insight into the nature of CVE-2021-20657.
What is CVE-2021-20657?
CVE-2021-20657 refers to a vulnerability in Lenovo Smart Camera X3, X5, and C2E that permits code execution if a specific file resides on the connected SD card. The issue has been linked to CNVD-2021-45262.
The Impact of CVE-2021-20657
The vulnerability poses a significant risk due to its high availability, confidentiality, and integrity impacts as well as the low attack complexity. An attacker can exploit this flaw without requiring any special privileges, potentially leading to severe consequences.
Technical Details of CVE-2021-20657
This section delves into the technical aspects of CVE-2021-20657.
Vulnerability Description
The vulnerability allows for code execution through the presence of a specific file on the SD card, which could be leveraged by malicious actors to compromise the affected Lenovo Smart Cameras.
Affected Systems and Versions
Lenovo Smart Camera X3, X5, and C2E firmware versions below 01.03.29.16 are susceptible to this vulnerability, making them vulnerable to exploitation.
Exploitation Mechanism
The vulnerability is considered to have a physical attack vector where user interaction is required to trigger the code execution, thereby impacting the availability, confidentiality, and integrity of the affected systems.
Mitigation and Prevention
This section outlines measures to mitigate and prevent the exploitation of CVE-2021-20657.
Immediate Steps to Take
Users should update their Lenovo Smart Camera X3, X5, and C2E firmware to version 01.03.29.16 or above to remediate the vulnerability and enhance the security posture.
Long-Term Security Practices
Implementing stringent security practices, restricting access to SD cards, and monitoring for any unusual activities can help prevent unauthorized code execution and safeguard the devices against potential attacks.
Patching and Updates
Regularly applying security patches, staying informed about the latest firmware releases, and promptly updating the devices are vital practices to ensure ongoing protection against known vulnerabilities.