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Fencer Vulns
medium 4.3

CVE-2023-6135 json

Multiple NSS NIST curves were susceptible to a side-channel attack known as "Minerva". This attack could potentially allow an attacker to r…

published 2023-12-19 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-58389

cvss
4.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 53%
public exploits
0
none known

Summary

Multiple NSS NIST curves were susceptible to a side-channel attack known as "Minerva". This attack could potentially allow an attacker to recover the private key. This vulnerability affects Firefox < 121.

Patch / fix

  • Mozilla Firefox 121
  • nss Debian 14, Debian 13 2:3.95-1

debian advisories DEBIAN-CVE-2023-6135

  • nss Ubuntu 20.04 LTS 2:3.98-0ubuntu0.20.04.1
  • nss Ubuntu 22.04 LTS 2:3.98-0ubuntu0.22.04.1
  • firefox Ubuntu 20.04 LTS 121.0+build1-0ubuntu0.20.04.1

ubuntu advisories UBUNTU-CVE-2023-6135

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • nss RHEL 9 3.90.0-6.el9_3
  • nspr RHEL 9 4.35.0-6.el9_3
  • nss-util RHEL 9 3.90.0-6.el9_3
  • nss-tools RHEL 9 3.90.0-6.el9_3
  • nss-softokn RHEL 9 3.90.0-6.el9_3
  • nss-sysinit RHEL 9 3.90.0-6.el9_3
  • nss-softokn-freebl RHEL 9 3.90.0-6.el9_3
  • nss RHEL 8 3.90.0-6.el8_9

red hat advisories RHSA-2024:0791RHSA-2024:0790RHSA-2024:0786RHSA-2024:0785

  • firefox-esr openSUSE Tumbleweed 128.5.1-1.1
  • MozillaFirefox openSUSE Tumbleweed 121.0-1.1

opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:13531-1

  • nss AlmaLinux 8 3.90.0-6.el8_9
  • nss-util AlmaLinux 8 3.90.0-6.el8_9
  • nss-tools AlmaLinux 8 3.90.0-6.el8_9
  • nss-softokn AlmaLinux 8 3.90.0-6.el8_9
  • nss-sysinit AlmaLinux 8 3.90.0-6.el8_9
  • nss-softokn-freebl AlmaLinux 8 3.90.0-6.el8_9
  • nss AlmaLinux 9 3.90.0-6.el9_3
  • nspr AlmaLinux 9 4.35.0-6.el9_3

almalinux advisories ALSA-2024:0786ALSA-2024:0790

  • nss Rocky Linux 8 3.90.0-6.el8_9

rocky linux advisories RLSA-2024:0786

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-6135 updated cvss 4.3

nss: vulnerable to Minerva side-channel information leak

  • Red Hat Enterprise Linux 6 nss, firefox, nss-tools, nss-sysinit, thunderbird
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 nss, firefox, nss-tools, nss-sysinit, thunderbird
    affected: workaround, no fix available, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 firefox, thunderbird
    affected: workaround, no fix available, no fix planned “Will not fix”
  • Red Hat Enterprise Linux 9 firefox, firefox-x11
    affected: workaround, no fix available
  • Red Hat Middleware Containers for OpenShift rh-sso-7/sso76-openshift-rhel8 7.6-42, rh-sso-7/sso7-rhel8-operator-bundle 7.6.7-4
    fixed: vendor fix RHSA-2024:1686
  • Red Hat Enterprise Linux AppStream (v. 8) nss 3.90.0-6.el8_9, nss-util 3.90.0-6.el8_9, nss-tools 3.90.0-6.el8_9, nss-softokn 3.90.0-6.el8_9, nss-sysinit 3.90.0-6.el8_9, nss-softokn-freebl 3.90.0-6.el8_9
    fixed: vendor fix RHSA-2024:0786
  • Red Hat Enterprise Linux AppStream (v. 9) nss 3.90.0-6.el9_3, nspr 4.35.0-6.el9_3, nss-util 3.90.0-6.el9_3, nss-tools 3.90.0-6.el9_3, nss-softokn 3.90.0-6.el9_3, nss-sysinit 3.90.0-6.el9_3, +1 more
    fixed: vendor fix RHSA-2024:0790
  • Red Hat Enterprise Linux AppStream AUS (v. 8.2) firefox 128.2.0-1.el8_2
    fixed: vendor fix RHSA-2024:6839
show 4 more
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) firefox 128.2.0-1.el9_0
    fixed: vendor fix RHSA-2024:6782
  • Red Hat Enterprise Linux AppStream EUS (v.8.8) nss 3.90.0-6.el8_8, firefox 128.2.0-1.el8_8, nss-util 3.90.0-6.el8_8, nss-tools 3.90.0-6.el8_8, nss-softokn 3.90.0-6.el8_8, nss-sysinit 3.90.0-6.el8_8, +1 more
    fixed: vendor fix RHSA-2024:6850
  • Red Hat Enterprise Linux AppStream EUS (v.9.2) nss 3.90.0-6.el9_2, nspr 4.35.0-6.el9_2, firefox 128.2.0-1.el9_2, nss-util 3.90.0-6.el9_2, nss-tools 3.90.0-6.el9_2, nss-softokn 3.90.0-6.el9_2, +3 more
    fixed: vendor fix RHSA-2024:6786
  • Red Hat Enterprise Linux 8 firefox, thunderbird Red Hat Enterprise Linux 9 firefox, firefox-x11, thunderbird
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.71% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Affected products

  • Mozilla Firefox

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.