CVE-2020-12402
Published: 19 June 2020
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.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
nss Launchpad, Ubuntu, Debian |
bionic |
Released
(2:3.35-2ubuntu2.9)
|
| eoan |
Released
(2:3.45-1ubuntu2.4)
|
|
| focal |
Released
(2:3.49.1-1ubuntu1.2)
|
|
| trusty |
Released
(2:3.28.4-0ubuntu0.14.04.5+esm6)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
| upstream |
Released
(3.53.1)
|
|
| xenial |
Released
(2:3.28.4-0ubuntu0.16.04.12)
|
|
|
Patches: upstream: https://hg.mozilla.org/projects/nss/rev/699541a7793bbe9b20f1d73dc49e25c6054aa4c1 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 4.4 |
| Attack vector | Local |
| Attack complexity | High |
| Privileges required | Low |
| User interaction | Required |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | None |
| Availability impact | None |
| Vector | CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N |