Arbitrary Code Injection Affecting Firefox-ESR package, versions [,128.8)
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- published10 Mar 2025
- disclosed4 Mar 2025
- creditSurya Dev Singh
Introduced: 4 Mar 2025
NewCVE-2025-1936 (opens in a new tab)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade Firefox-ESR to version 128.8 or higher.
Overview
Affected versions of this package are vulnerable to Arbitrary Code Injection due to improper handling of null bytes %00 in jar: URLs. An attacker can append %00 followed by a fake file extension to a jar: URL, causing the system to ignore the null byte when retrieving the file content but use the fake extension to determine the file type