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Fencer Intel
medium 5.9

CVE-2020-12413 json

The Raccoon attack is a timing attack on DHE ciphersuites inherit in the TLS specification.

published 3y ago modified 4mo ago also EUVD-2020-4725

cvss
5.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 48%
public exploits
0
none known

Summary

The Raccoon attack is a timing attack on DHE ciphersuites inherit in the TLS specification. To mitigate this vulnerability, Firefox disabled support for DHE ciphersuites.

Patch / fix

  • Mozilla Firefox 78
  • Mozilla Firefox ESR 68.10
  • nss Debian 14, Debian 13, Debian 12 2:3.17-1

debian advisories DEBIAN-CVE-2020-12413

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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-2020-12413 updated cvss 5.9

nss: Information exposure when DH secret are reused across multiple TLS connections

  • Red Hat Enterprise Linux 5 nss Red Hat Enterprise Linux 6 nss, nss-tools, nss-sysinit Red Hat Enterprise Linux 7 nss, nss-tools, nss-sysinit Red Hat Enterprise Linux 8 nss, nss-util, nss-tools, nss-softokn, nss-sysinit, nss-softokn-freebl Red Hat Enterprise Linux 9 nss, nspr, nss-util, nss-tools, nss-softokn, nss-sysinit, +1 more
    affected: workaround, no fix planned “Any risk involving the ECDHE key reuse on the nss server can be mitigated by setting the SSL_REUSE_SERVER_ECDHE_KEY socket option to PR_FALSE.”

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
last yr.

Exploit prediction

0.59% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CISA ADP 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

  • Mozilla Firefox
  • Mozilla Firefox ESR

Classification

Weakness

References

Sources

Fencer Intel 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.