CVE-2020-12402
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,…
Does this matter?
Lower severity and a low EPSS score (0.34%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 4.4 MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N
- EPSS
- 0.34% probability · 27th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-203
- Affected
- mozilla/firefox · fedoraproject/fedora · opensuse/leap · debian/debian linux
- Source
- security@mozilla.org
References
- 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 Tracking, Permissions Required, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2020/09/msg00029.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RFL6UNFK4MG2WDXLMLFAEIUSM5EUK7CG/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UWVDJRARXNWWWTCGMM63EXLQHH2LNOXO/
- https://security.gentoo.org/glsa/202007-10Third Party Advisory
- https://usn.ubuntu.com/4417-1/Third Party Advisory
- https://usn.ubuntu.com/4417-2/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4726Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-24/Vendor Advisory
- 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 Tracking, Permissions Required, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2020/09/msg00029.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RFL6UNFK4MG2WDXLMLFAEIUSM5EUK7CG/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UWVDJRARXNWWWTCGMM63EXLQHH2LNOXO/
- https://security.gentoo.org/glsa/202007-10Third Party Advisory
- https://usn.ubuntu.com/4417-1/Third Party Advisory
- https://usn.ubuntu.com/4417-2/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4726Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-24/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.