CVE-2018-12404
A cached side channel attack during handshakes using RSA encryption could allow for the decryption of encrypted content.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 44.2%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 3.0
- 5.9 MEDIUMCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 44.25% probability · 99th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Affected
- mozilla/network security services
- Source
- security@mozilla.org
EPSS moved from 39.6% on 21 September 2026 to 44.2% on 27 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00021.html
- http://www.securityfocus.com/bid/107260Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2019:2237
- https://bugzilla.mozilla.org/show_bug.cgi?id=CVE-2018-12404Issue Tracking, VDB Entry, Vendor Advisory
- 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/107260Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2019:2237
- https://bugzilla.mozilla.org/show_bug.cgi?id=CVE-2018-12404Issue Tracking, VDB Entry, Vendor Advisory
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.