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TI-2018-08884 Aliases CVE-2018-12384GHSA-rg3c-6wcj-37gm

When handling a SSLv2-compatible ClientHello request, the server doesn't generate a new…

Priority LOW 29CWE-335Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat.

Summary

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.

Why it matters now

EPSS 0.01484 74th percentileScored 2026-11-07
Fix Fixed Red Hat: 2 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
NSSNetwork Security Services (NSS)All versions prior to NSS 3.39—No fix listedCNA
  • Network Security Services (NSS) VendorNSS Affected All versions prior to NSS 3.39 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:network_security_services:*:*:*:*:*:*:*:*before 3.39VulnerableMozilla
  • cpe:2.3:a:mozilla:network_security_services:*:*:*:*:*:*:*:* Versions before 3.39 Vulnerable ·Mozilla

Remediation

Red Hat 2 advisories

  • RHSA-2018:2898 Released 2018-10-09 · Red Hat rating Moderate
    nss security update
    • Red Hat Enterprise Linux Desktop (v. 6) nss-3.36.0-9.el6_10, nss-sysinit-3.36.0-9.el6_10, nss-tools-3.36.0-9.el6_10
    • Red Hat Enterprise Linux Desktop Optional (v. 6) nss-devel-3.36.0-9.el6_10, nss-pkcs11-devel-3.36.0-9.el6_10
    • Red Hat Enterprise Linux HPC Node (v. 6) nss-3.36.0-9.el6_10, nss-sysinit-3.36.0-9.el6_10, nss-tools-3.36.0-9.el6_10
    • Red Hat Enterprise Linux HPC Node Optional (v. 6) nss-devel-3.36.0-9.el6_10, nss-pkcs11-devel-3.36.0-9.el6_10
    • Red Hat Enterprise Linux Server (v. 6) nss-3.36.0-9.el6_10, nss-3.36.0-9.el6_10.ppc, nss-devel-3.36.0-9.el6_10 +3
    • Red Hat Enterprise Linux Server Optional (v. 6) nss-pkcs11-devel-3.36.0-9.el6_10, nss-pkcs11-devel-3.36.0-9.el6_10.ppc
    • Red Hat Enterprise Linux Workstation (v. 6) nss-3.36.0-9.el6_10, nss-devel-3.36.0-9.el6_10, nss-sysinit-3.36.0-9.el6_10 +1
    • Red Hat Enterprise Linux Workstation Optional (v. 6) nss-pkcs11-devel-3.36.0-9.el6_10
  • RHSA-2018:2768 Released 2018-09-25 · Red Hat rating Moderate
    nss security update
    • Red Hat Enterprise Linux Client (v. 7) nss-3.36.0-7.el7_5, nss-sysinit-3.36.0-7.el7_5, nss-tools-3.36.0-7.el7_5
    • Red Hat Enterprise Linux Client Optional (v. 7) nss-devel-3.36.0-7.el7_5, nss-pkcs11-devel-3.36.0-7.el7_5
    • Red Hat Enterprise Linux ComputeNode (v. 7) nss-3.36.0-7.el7_5, nss-sysinit-3.36.0-7.el7_5, nss-tools-3.36.0-7.el7_5
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) nss-devel-3.36.0-7.el7_5, nss-pkcs11-devel-3.36.0-7.el7_5
    • Red Hat Enterprise Linux Server (v. 7) nss-3.36.0-7.el7_5, nss-3.36.0-7.el7_5.ppc, nss-devel-3.36.0-7.el7_5 +3
    • Red Hat Enterprise Linux Server Optional (v. 7) nss-pkcs11-devel-3.36.0-7.el7_5, nss-pkcs11-devel-3.36.0-7.el7_5.ppc
    • Red Hat Enterprise Linux Workstation (v. 7) nss-3.36.0-7.el7_5, nss-devel-3.36.0-7.el7_5, nss-sysinit-3.36.0-7.el7_5 +1
    • Red Hat Enterprise Linux Workstation Optional (v. 7) nss-pkcs11-devel-3.36.0-7.el7_5
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) nss-3.36.0-7.el7_5, nss-devel-3.36.0-7.el7_5, nss-sysinit-3.36.0-7.el7_5 +1
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) nss-pkcs11-devel-3.36.0-7.el7_5

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2018:2768
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2018:2768
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2018:2768
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2018:2768
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2018:2898
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2018:2898
Red Hat Enterprise Linux HPC Node (v. 6)Fixed RHSA-2018:2898
Red Hat Enterprise Linux HPC Node Optional (v. 6)Fixed RHSA-2018:2898
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2018:2898
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2018:2768
Red Hat Enterprise Linux Server Optional (v. 6)Fixed RHSA-2018:2898
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2018:2768
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2018:2898
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2018:2768
Red Hat Enterprise Linux Workstation Optional (v. 6)Fixed RHSA-2018:2898
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2018:2768
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)Fixed RHSA-2018:2768
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)Fixed RHSA-2018:2768
Not affected: 2 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-12384
  2. 2026-10-03 Alias added: GHSA-rg3c-6wcj-37gm

References

Advisory 1

Other 1

  • TI-2015-03381 The TLS protocol 1.2 and earlier, when a DHE_EXPORT ciphersuite is enabled on a server… CVSS 3.1LOW 3.7
  • TI-2007-00009 Stack-based buffer overflow in the SSLv2 support in Mozilla Network Security Services… CVSS 2.0MEDIUM 6.8
  • TI-2018-08903 A cached side channel attack during handshakes using RSA encryption could allow for the… CVSS 3.0MEDIUM 5.9
  • TI-2015-05957 Heap-based buffer overflow in the ASN.1 decoder in Mozilla Network Security Services… CVSS 3.0CRITICAL 9.8
  • TI-2004-00763 Heap-based buffer overflow in Netscape Network Security Services (NSS) library allows… CVSS 2.0HIGH 7.5
  • TI-2014-01197 Use-after-free vulnerability in the CERT_DestroyCertificate function in libnss3.so in… CVSS 2.0HIGH 10.0
See all 49 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences