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Vulnerability details: VCID-sv69-65sj-vybj
Vulnerability ID VCID-sv69-65sj-vybj
Aliases CVE-2020-12400
Summary When converting coordinates from projective to affine, the modular inversion was not performed in constant time, resulting in a possible timing-based side channel attack.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-327 Use of a Broken or Risky Cryptographic Algorithm
CWE-203 Observable Discrepancy
System Score Found at
cvssv3 4.4 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-12400.json
epss 0.00061 https://api.first.org/data/v1/epss?cve=CVE-2020-12400
epss 0.00061 https://api.first.org/data/v1/epss?cve=CVE-2020-12400
epss 0.00061 https://api.first.org/data/v1/epss?cve=CVE-2020-12400
epss 0.00061 https://api.first.org/data/v1/epss?cve=CVE-2020-12400
epss 0.00061 https://api.first.org/data/v1/epss?cve=CVE-2020-12400
epss 0.00061 https://api.first.org/data/v1/epss?cve=CVE-2020-12400
epss 0.00061 https://api.first.org/data/v1/epss?cve=CVE-2020-12400
epss 0.00061 https://api.first.org/data/v1/epss?cve=CVE-2020-12400
epss 0.00061 https://api.first.org/data/v1/epss?cve=CVE-2020-12400
epss 0.00061 https://api.first.org/data/v1/epss?cve=CVE-2020-12400
epss 0.00061 https://api.first.org/data/v1/epss?cve=CVE-2020-12400
epss 0.00061 https://api.first.org/data/v1/epss?cve=CVE-2020-12400
epss 0.00061 https://api.first.org/data/v1/epss?cve=CVE-2020-12400
epss 0.00061 https://api.first.org/data/v1/epss?cve=CVE-2020-12400
epss 0.00061 https://api.first.org/data/v1/epss?cve=CVE-2020-12400
epss 0.00061 https://api.first.org/data/v1/epss?cve=CVE-2020-12400
epss 0.00061 https://api.first.org/data/v1/epss?cve=CVE-2020-12400
cvssv2 1.2 https://nvd.nist.gov/vuln/detail/CVE-2020-12400
cvssv3.1 4.7 https://nvd.nist.gov/vuln/detail/CVE-2020-12400
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2020-36
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2020-39
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-12400.json
https://api.first.org/data/v1/epss?cve=CVE-2020-12400
https://bugzilla.mozilla.org/show_bug.cgi?id=1623116
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12400
https://lists.debian.org/debian-lts-announce/2023/02/msg00021.html
https://www.mozilla.org/security/advisories/mfsa2020-36/
https://www.mozilla.org/security/advisories/mfsa2020-39/
1853983 https://bugzilla.redhat.com/show_bug.cgi?id=1853983
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:android:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox:*:*:*:*:*:android:*:*
CVE-2020-12400 https://nvd.nist.gov/vuln/detail/CVE-2020-12400
mfsa2020-36 https://www.mozilla.org/en-US/security/advisories/mfsa2020-36
mfsa2020-39 https://www.mozilla.org/en-US/security/advisories/mfsa2020-39
RHSA-2020:4076 https://access.redhat.com/errata/RHSA-2020:4076
RHSA-2021:0538 https://access.redhat.com/errata/RHSA-2021:0538
RHSA-2021:0949 https://access.redhat.com/errata/RHSA-2021:0949
USN-4455-1 https://usn.ubuntu.com/4455-1/
USN-4474-1 https://usn.ubuntu.com/4474-1/
No exploits are available.
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-12400.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:L/AC:H/Au:N/C:P/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-12400
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-12400
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.19397
EPSS Score 0.00061
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:09:40.970405+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2020/mfsa2020-36.yml 37.0.0