EC Scalar Point Multiplication Vulnerability in Firefox and Firefox for Android
CVE-2020-6829

5.3MEDIUM

Key Information:

Vendor

Mozilla
Status
Firefox
Firefox For Android
Vendor
CVE Published:
28 October 2020

What is CVE-2020-6829?

A vulnerability exists in Firefox and Firefox for Android where the wNAF point multiplication algorithm, used during EC scalar point multiplication, inadvertently leaks partial information about the nonce employed in digital signature generation. This leakage could potentially allow an adversary, by observing electro-magnetic traces from a small number of signature processes, to derive the private key linked to the corresponding public key. The issue specifically impacts versions prior to 80, highlighting a significant security risk for users operating on these versions.

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Deploy the Patch

Affected Version(s)

Firefox < 80

Firefox for Android < 80

References

https://www.mozilla.org/security/advisories/mfsa2020-39/
https://www.mozilla.org/security/advisories/mfsa2020-36/
https://bugzilla.mozilla.org/show_bug.cgi?id=1631583

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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