CVE-2018-12384

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.

Score

CVSS 3.0 5.9 Medium

Status

Modified - security@mozilla.org

Published

2019-04-29

Last modified

2024-08-05

Weaknesses

CWE-330, CWE-335

Affected products

• Network Security Services (Mozilla)
• Network Security Services Nss (Nss)

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=CVE-2018-12384
• https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html