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CVE

CVE-2020-12402

During RSA key generation, bignum implementations used a variation of the Binary Extended Euclidean Algorithm which enta

During RSA key generation, bignum implementations used a variation of the Binary Extended Euclidean Algorithm which entailed significantly input-dependent flow. This allowed an attacker able to perform electromagnetic-based side channel attacks to record traces leading to the recovery of the secret primes. Note: An unmodified Firefox browser does not generate RSA keys in normal operation and is not affected, but products built on top of it might. This vulnerability affects Firefox < 78.

MEDIUM · CVSS 4.4 EPSS 0.00097
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  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules1 YARA rules0
⬡

Weakness Classification

CWE-203Observable Discrepancy
▤

Affected Products & Versions

4
mozilla firefox< 78.0
fedoraproject fedoraall versions
opensuse leapall versions
debian linuxall versions
◈

Sigma Hunt Rules

1
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSQLite Firefox Profile Data DB Access
▣

Scoring & Timeline

4.4
MEDIUM · CVSS v3.1 · security@mozilla.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD09 Jul 2020 · 03:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N
⚑

Vendor Advisories

19
suse-csafopenSUSE-SU-2024:14572-1
suse-csafopenSUSE-SU-2024:10600-1
suse-csafopenSUSE-SU-2024:11058-1
rhsaRHSA-2021:0949Important
rhsaRHSA-2020:4076Moderate
🔗

References & Sources

13
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00016.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00018.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.htmlThird Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1631597Issue TrackingPermissions RequiredVendor Advisory
https://lists.debian.org/debian-lts-announce/2020/09/msg00029.htmlMailing ListThird Party Advisory
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