VULNERABILITY INTELLIGENCE
CVE-2014-5386
CVSS score5 MEDIUM
EPSS probability1.52%
CISA KEVNot currently listed
Published2014-12-28
Last modified2026-06-17
CVSS vectorAV:N/AC:L/Au:N/C:N/I:P/A:N
Description
The mcrypt_create_iv function in hphp/runtime/ext/mcrypt/ext_mcrypt.cpp in Facebook HipHop Virtual Machine (HHVM) before 3.3.0 does not seed the random number generator, which makes it easier for remote attackers to defeat cryptographic protection mechanisms by leveraging the use of a single initialization vector.