What’s Vulnerable › Vulnerabilities

CVE-2020-12413

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-02-16 · updated 2026-06-17
• Weakness: CWE-203

Description

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.

Affected products

• Mozilla Firefox: before 78.0 — fixed in 78.0
• Mozilla Firefox ESR: before 68.10.0 — fixed in 68.10.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 78.0; Mozilla Firefox ESR 68.10.0. Check the vendor advisory for mitigations.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=CVE-2020-12413
• https://raccoon-attack.com/
• https://bugzilla.mozilla.org/show_bug.cgi?id=CVE-2020-12413
• https://raccoon-attack.com/

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