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Advisories

openssl_encrypt before 1.4.9 Weak Pepper Key Derivation

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severity
high
date
Affecting

  • openssl_encrypt >= 0, < 1.4.9

CWE
  • CWE-916 Use of Password Hash With Insufficient Computational Effort
CVSS
8.7
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Description
openssl_encrypt versions before 1.4.9 derive the remote-pepper wrap key using unsalted HKDF-SHA256 or bare SHA-256 of the password, allowing identical keys across all users and files. Attackers with access to wrapped pepper blobs can precompute a single dictionary table and perform fleet-wide offline password guessing at hardware speed to recover user passwords.

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