Firefox ESR: During RSA key generation, bignum implementations used a variation of the Binary Extended Euclidean Algorithm…
CVE-2020-12402 is fixed in 15 products on 2 platforms, first by libnss3 2:3.35-2ubuntu2.9, released June 18, 2020. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Mozilla Firefox ESR (en-US) | 78.0esr | Mozilla Firefox ESR (en-US) 78.0esr | Jun 25, 2020 |
| Linux | |||
| libnss3 · Ubuntu 18.04.6 LTS (bionic) | 2:3.35-2ubuntu2.9 | libnss3 2:3.35-2ubuntu2.9 | Jun 18, 2020 |
| libnss3 · Ubuntu 20.04 LTS (focal) | 2:3.49.1-1ubuntu1.2 | libnss3 2:3.49.1-1ubuntu1.2 | Jun 18, 2020 |
| libnss3-tools · Ubuntu 18.04.6 LTS (bionic) | 2:3.35-2ubuntu2.9 | libnss3-tools 2:3.35-2ubuntu2.9 | Jun 18, 2020 |
| libnss3-tools · Ubuntu 20.04 LTS (focal) | 2:3.49.1-1ubuntu1.2 | libnss3-tools 2:3.49.1-1ubuntu1.2 | Jun 18, 2020 |
| nspr · RHEL 8 | 0:4.25.0-2.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nspr · ol 8 | 0:4.25.0-2.el8_2 | ELSA-2020-3280 | Aug 4, 2020 |
| nspr-devel · RHEL 8 | 0:4.25.0-2.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nspr-devel · ol 8 | 0:4.25.0-2.el8_2 | ELSA-2020-3280 | Aug 4, 2020 |
| nss · RHEL 8 | 0:3.53.1-11.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nss · ol 8 | 0:3.53.1-11.el8_2 | ELSA-2020-3280 | Aug 4, 2020 |
| nss-devel · RHEL 8 | 0:3.53.1-11.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nss-devel · ol 8 | 0:3.53.1-11.el8_2 | ELSA-2020-3280 | Aug 4, 2020 |
| nss-softokn · RHEL 8 | 0:3.53.1-11.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nss-softokn · ol 8 | 0:3.53.1-11.el8_2 | ELSA-2020-3280 | Aug 4, 2020 |
| nss-softokn-devel · RHEL 8 | 0:3.53.1-11.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nss-softokn-devel · ol 8 | 0:3.53.1-11.el8_2 | ELSA-2020-3280 | Aug 4, 2020 |
| nss-softokn-freebl · RHEL 8 | 0:3.53.1-11.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nss-softokn-freebl · ol 8 | 0:3.53.1-11.el8_2 | ELSA-2020-3280 | Aug 4, 2020 |
| nss-softokn-freebl-devel · RHEL 8 | 0:3.53.1-11.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nss-softokn-freebl-devel · ol 8 | 0:3.53.1-11.el8_2 | ELSA-2020-3280 | Aug 4, 2020 |
| nss-sysinit · RHEL 8 | 0:3.53.1-11.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nss-sysinit · ol 8 | 0:3.53.1-11.el8_2 | ELSA-2020-3280 | Aug 4, 2020 |
| nss-tools · RHEL 8 | 0:3.53.1-11.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nss-tools · ol 8 | 0:3.53.1-11.el8_2 | ELSA-2020-3280 | Aug 4, 2020 |
| nss-util · RHEL 8 | 0:3.53.1-11.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nss-util · ol 8 | 0:3.53.1-11.el8_2 | ELSA-2020-3280 | Aug 4, 2020 |
| nss-util-devel · RHEL 8 | 0:3.53.1-11.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nss-util-devel · ol 8 | 0:3.53.1-11.el8_2 | ELSA-2020-3280 | Aug 4, 2020 |
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