CVE-2020-12402

MEDIUM

Firefox < 78.0 - Side-Channel Information Disclosure during RSA Key Generation

Title source: llm
STIX 2.1

Description

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.

References (13)

Core 13
Core References
Issue Tracking, Permissions Required, Vendor Advisory x_refsource_misc
https://bugzilla.mozilla.org/show_bug.cgi?id=1631597
Third Party Advisory vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00016.html
Third Party Advisory vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00018.html
Third Party Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/4417-1/
Third Party Advisory vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html
Third Party Advisory vendor-advisory x_refsource_debian
https://www.debian.org/security/2020/dsa-4726
Third Party Advisory vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html
Third Party Advisory vendor-advisory x_refsource_gentoo
https://security.gentoo.org/glsa/202007-10
Third Party Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/4417-2/
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2020/09/msg00029.html

Scores

CVSS v3 4.4
EPSS 0.0010
EPSS Percentile 27.5%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N

Details

CWE
CWE-203
Status published
Products (5)
debian/debian_linux 9.0
fedoraproject/fedora 32
mozilla/firefox < 78.0
opensuse/leap 15.1
opensuse/leap 15.2
Published Jul 09, 2020
Tracked Since Feb 18, 2026