CVE-2018-12404

A cached side channel attack during handshakes using RSA encryption could allow for the decryption of encrypted content. This is a variant of the Adaptive Chosen Ciphertext attack (AKA Bleichenbacher attack) and affects all NSS versions prior to NSS 3.41.

Published: 2019-05-02 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-12404 is rated Moderate Risk (54.8/100): CVSS Medium severity, with high exploitation likelihood (EPSS 12.78%, 94th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2018-12404

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-26 14.50% 12.78% -1.72%
2 2026-03-02 33.54% 14.50% -19.04%
3 2026-02-15 — 33.54% —

Full EPSS history (25 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-12404

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.9 3.0 MEDIUM
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.2 3.6 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2018-12404

OS Trackers for CVE-2018-12404

vendor priority summary link
alpine medium CVE-2018-12404: 1 source package rows (nss); 11 state rows across 11 repos (3.10-main, 3.11-main, 3.12-main, 3.17-community, 3.18-community, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-community, edge-main); fixed 11, open 0. https://security.alpinelinux.org/vuln/CVE-2018-12404
debian not yet assigned CVE-2018-12404 not yet assigned priority: Debian including 1 source packages (nss), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2018-12404
redhat medium — https://access.redhat.com/security/cve/CVE-2018-12404
suse medium CVE-2018-12404 severity moderate: SUSE including 537 source package names (1.0.0.1862.1.5.2:libfreebl3-3.41.1-3.13.1, 1.0.0.1862.1.5.2:libsoftokn3-3.41.1-3.13.1, …), 1445 product×package rows across 343 product lines (Container bci/bci-sle15-kernel-module-devel, Container bci/kiwi, … (343 product lines)): Fixed 1147, Known Affected 157, Known Not Affected 141. https://www.suse.com/security/cve/CVE-2018-12404/
ubuntu medium CVE-2018-12404 medium priority: Ubuntu including 1 source packages (nss), 5 status rows across 5 suites (bionic, cosmic, trusty, upstream, xenial): released 5. https://ubuntu.com/security/CVE-2018-12404

Affected software / configurations for CVE-2018-12404

Vendor Product Version Raw CPE
mozilla network_security_services < 3.41 cpe:2.3:a:mozilla:network_security_services:*:*:*:*:*:*:*:*

References for CVE-2018-12404

cvelogic Threat Intelligence