CVE-2026-81717
LowCVSS 3.5Summary
openssl_encrypt before 1.4.9 has two weaknesses in the portable USB drive feature. Integrity verification misses files not in the manifest, and a fixed KDF salt enables rainbow-table attacks.
Risk Assessment
An attacker with physical access can add malicious files undetected or break encryption, leading to data confidentiality breaches.
Recommendation
Upgrade openssl_encrypt to version 1.4.9 or later.
Original NVD description (English source)
openssl_encrypt (pip package openssl-encrypt) before 1.4.9 contains two weaknesses in the portable USB drive feature, whose threat model treats the removable drive as untrusted (attacker with physical write access). USBDriveCreator._verify_integrity_file only validates files listed in the manifest, so files added to the drive — including a root-level autorun payload — are not detected and integrity verification still passes. Additionally, a globally constant, source-embedded KDF salt (_LEGACY_FIXED_SALT) is used to derive the drive encryption key for any drive lacking a per-drive salt file, defeating precomputation resistance and enabling an offline rainbow-table attack.