CVE-2018-12384

Advisory lineage Upstream: 0 Downstream: 11
Modified
Published: 29 Apr 2019, 14:22
Last modified:05 Aug 2024, 08:31

Vulnerability Summary

Overall Risk (default)
low
24/100
CVSS Score
5.9 MEDIUM
v3.0 (nvd)
EPSS Score
0.62% LOW
1% probability -0.23%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

29 Apr 2019, 14:22
Published
Vulnerability first disclosed
05 Aug 2024, 08:31
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.0•MEDIUM•Score: 5.9CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
  • v2.0•MEDIUM•Score: 4.3AV:N/AC:M/Au:N/C:P/I:N/A:N

EPSS Trends

Current EPSS score: 0.62%• Percentile: 70%

Techniques & Countermeasures

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

    The product uses a Pseudo-Random Number Generator (PRNG) but does not correctly manage seeds.

Affected Systems

  • mozilla•network_security_services

    < 3.39

  • nss•network security services (nss)

    All versions prior to NSS 3.39

References (2)