CVE-2018-12404

Severity: medium (CVSS 5.9 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 44.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-05-02 · updated 2026-06-17

Description

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.

Affected products

Mozilla Network Security Services: before 3.41 — fixed in 3.41

How to fix

Upgrade to a fixed version: Mozilla Network Security Services 3.41. Check the vendor advisory for mitigations.

References

http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00021.html
http://www.securityfocus.com/bid/107260
https://access.redhat.com/errata/RHSA-2019:2237
https://bugzilla.mozilla.org/show_bug.cgi?id=CVE-2018-12404
https://cert-portal.siemens.com/productcert/pdf/ssa-379803.pdf
https://lists.debian.org/debian-lts-announce/2020/09/msg00029.html
https://us-cert.cisa.gov/ics/advisories/icsa-21-040-04
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00021.html
http://www.securityfocus.com/bid/107260
https://access.redhat.com/errata/RHSA-2019:2237
https://bugzilla.mozilla.org/show_bug.cgi?id=CVE-2018-12404

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