Home/CVE/When handling a SSLv2-compatible ClientHello request, the server doesn't generate a new random value but sends an all-ze
CVE

CVE-2018-12384

When handling a SSLv2-compatible ClientHello request, the server doesn't generate a new random value but sends an all-ze

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.

MEDIUM · CVSS 5.9 EPSS 0.00622
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

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

Affected Products & Versions

1
mozilla network security services< 3.39
▣

Scoring & Timeline

5.9
MEDIUM · CVSS v3.0 · security@mozilla.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD29 Apr 2019 · 03:29 PM
CVSS VectorCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
⚑

Vendor Advisories

8
suse-csafopenSUSE-SU-2024:11058-1
suse-csafSUSE-SU-2018:4236-2
usnUSN-3850-2
usnUSN-3850-1
suse-csafSUSE-SU-2018:4235-1
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://bugzilla.mozilla.org/show_bug.cgi?id=CVE-2018-12384Issue TrackingVendor Advisory
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
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