Medium severity · published Oct 28, 2020
CVE-2020-6829
When performing EC scalar point multiplication, the wNAF point multiplication algorithm was used; which leaked partial information about the nonce used during signature generation
5.3
CVSS
1.5%
EPSS
No
On KEV
Description
When performing EC scalar point multiplication, the wNAF point multiplication algorithm was used; which leaked partial information about the nonce used during signature generation. Given an electro-magnetic trace of a few signature generations, the private key could have been computed. This vulnerability affects Firefox < 80 and Firefox for Android < 80.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.5% · higher than 74% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
Firefox · Mozilla
before 80.0 · source: NVD
FM
Firefox Mobile · Mozilla
before 80.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-6829
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-6829
Permissions Required
https://bugzilla.mozilla.org/show_bug.cgi?id=1631583
lists.debian.org
https://lists.debian.org/debian-lts-announce/2023/02/msg00021.html
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-36/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-39/
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