CVE-2020-12402
Publication date 19 June 2020
Last updated 24 July 2024
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| nss | 20.04 LTS focal |
Fixed 2:3.49.1-1ubuntu1.2
|
| 18.04 LTS bionic |
Fixed 2:3.35-2ubuntu2.9
|
|
| 16.04 LTS xenial |
Fixed 2:3.28.4-0ubuntu0.16.04.12
|
|
| 14.04 LTS trusty |
Fixed 2:3.28.4-0ubuntu0.14.04.5+esm6
|
Get expanded security coverage with Ubuntu Pro
Reduce your average CVE exposure time from 98 days to 1 day with expanded CVE patching, ten-years security maintenance and optional support for the full stack of open-source applications. Free for personal use.
Get Ubuntu ProPatch details
| Package | Patch details |
|---|---|
| nss |
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
4.4 · Medium
|
| 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 |
References
Related Ubuntu Security Notices (USN)
- USN-4417-1
- NSS vulnerability
- 6 July 2020
- USN-4417-2
- NSS vulnerability
- 6 July 2020