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Vulnerability DatabaseCVE-2025-1020

CVE-2025-1020: 
NixOS vulnerability analysis and mitigation

Overview

CVE-2025-1020 is a high-impact memory safety vulnerability discovered in Firefox 134 and Thunderbird 134, disclosed on February 4, 2025. The vulnerability affects Firefox versions prior to 135 and Thunderbird versions prior to 135. The issue was identified by the Mozilla Fuzzing Team and involves memory corruption bugs that could potentially be exploited (Mozilla Advisory).

Technical details

The vulnerability is classified as a memory safety bug with evidence of memory corruption. It has received a CVSS v3.1 base score of 9.8 (CRITICAL) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. The vulnerability is associated with CWE-787 (Out-of-bounds Write) according to NIST and CISA-ADP assessments (NVD).

Impact

The vulnerability could potentially allow attackers to execute arbitrary code through memory corruption exploitation. The high severity rating indicates significant potential impact on system confidentiality, integrity, and availability. The critical CVSS score of 9.8 suggests that successful exploitation could lead to complete system compromise (Red Hat).

Mitigation and workarounds

The vulnerability has been fixed in Firefox 135 and Thunderbird 135. Users are strongly advised to upgrade to these versions to mitigate the risk. Mozilla has released security patches that address the memory safety issues in both applications (Mozilla Advisory).

Additional resources

Source: This report was generated using AI

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