Advisories

openssl_encrypt before 1.4.0 Weak PRNG Steganography Pixel Selection

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severity
high
date
Affecting
  • openssl_encrypt >= 0, < 1.4.0

CWE
  • CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
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 1.4.0 use Python's non-cryptographic random module for steganographic pixel selection in the generate_pseudorandom_sequence function. Attackers who know the password can recover the Mersenne Twister state from approximately 624 outputs and predict pixel locations containing hidden data for extraction.

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