VULNERABILITY INTELLIGENCE

CVE-2018-12384

CVSS score5.9 MEDIUM
EPSS probability1.48%
CISA KEVNot currently listed
Published2019-04-29
Last modified2026-06-17
CVSS vectorCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Description

When handling a SSLv2-compatible ClientHello request, the server doesn't generate a new random value but sends an all-zero value instead. This results in full malleability of the ClientHello for SSLv2 used for TLS 1.2 in all versions prior to NSS 3.39. This does not impact TLS 1.3.

Weakness classification

  • CWE-335: Incorrect Usage of Seeds in Pseudo-Random Number Generator (PRNG)

Primary references