UBUNTU-CVE-2020-12402

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Source
https://ubuntu.com/security/CVE-2020-12402
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-12402.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2020-12402
Upstream
Downstream
Related
Published
2020-06-19T00:00:00Z
Modified
2025-09-08T16:46:06Z
Severity
  • 4.4 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

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

Affected packages

Ubuntu:Pro:14.04:LTS / nss

Package

Name
nss
Purl
pkg:deb/ubuntu/nss@2:3.28.4-0ubuntu0.14.04.5+esm6?arch=source&distro=trusty/esm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:3.28.4-0ubuntu0.14.04.5+esm6

Affected versions

2:3.*

2:3.15.1-1ubuntu1
2:3.15.2-1
2:3.15.3-1
2:3.15.3.1-1
2:3.15.3.1-1.1
2:3.15.3.1-1.1ubuntu1
2:3.15.4-1ubuntu3
2:3.15.4-1ubuntu4
2:3.15.4-1ubuntu5
2:3.15.4-1ubuntu6
2:3.15.4-1ubuntu7
2:3.15.4-1ubuntu7.1
2:3.17-0ubuntu0.14.04.1
2:3.17.1-0ubuntu0.14.04.1
2:3.17.1-0ubuntu0.14.04.2
2:3.17.4-0ubuntu0.14.04.1
2:3.19.2-0ubuntu0.14.04.1
2:3.19.2.1-0ubuntu0.14.04.1
2:3.19.2.1-0ubuntu0.14.04.2
2:3.21-0ubuntu0.14.04.1
2:3.21-0ubuntu0.14.04.2
2:3.23-0ubuntu0.14.04.1
2:3.26.2-0ubuntu0.14.04.3
2:3.28.4-0ubuntu0.14.04.1
2:3.28.4-0ubuntu0.14.04.2
2:3.28.4-0ubuntu0.14.04.3
2:3.28.4-0ubuntu0.14.04.4
2:3.28.4-0ubuntu0.14.04.5
2:3.28.4-0ubuntu0.14.04.5+esm1
2:3.28.4-0ubuntu0.14.04.5+esm2
2:3.28.4-0ubuntu0.14.04.5+esm3
2:3.28.4-0ubuntu0.14.04.5+esm4
2:3.28.4-0ubuntu0.14.04.5+esm5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2:3.28.4-0ubuntu0.14.04.5+esm6",
            "binary_name": "libnss3"
        },
        {
            "binary_version": "2:3.28.4-0ubuntu0.14.04.5+esm6",
            "binary_name": "libnss3-1d"
        },
        {
            "binary_version": "2:3.28.4-0ubuntu0.14.04.5+esm6",
            "binary_name": "libnss3-dev"
        },
        {
            "binary_version": "2:3.28.4-0ubuntu0.14.04.5+esm6",
            "binary_name": "libnss3-nssdb"
        },
        {
            "binary_version": "2:3.28.4-0ubuntu0.14.04.5+esm6",
            "binary_name": "libnss3-tools"
        }
    ],
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}

Ubuntu:16.04:LTS / nss

Package

Name
nss
Purl
pkg:deb/ubuntu/nss@2:3.28.4-0ubuntu0.16.04.12?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:3.28.4-0ubuntu0.16.04.12

Affected versions

2:3.*

2:3.19.2-1ubuntu1
2:3.19.2.1-0ubuntu1
2:3.21-1ubuntu2
2:3.21-1ubuntu3
2:3.21-1ubuntu4
2:3.23-0ubuntu0.16.04.1
2:3.26.2-0ubuntu0.16.04.2
2:3.28.4-0ubuntu0.16.04.1
2:3.28.4-0ubuntu0.16.04.2
2:3.28.4-0ubuntu0.16.04.3
2:3.28.4-0ubuntu0.16.04.4
2:3.28.4-0ubuntu0.16.04.5
2:3.28.4-0ubuntu0.16.04.6
2:3.28.4-0ubuntu0.16.04.8
2:3.28.4-0ubuntu0.16.04.9
2:3.28.4-0ubuntu0.16.04.10
2:3.28.4-0ubuntu0.16.04.11

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2:3.28.4-0ubuntu0.16.04.12",
            "binary_name": "libnss3"
        },
        {
            "binary_version": "2:3.28.4-0ubuntu0.16.04.12",
            "binary_name": "libnss3-1d"
        },
        {
            "binary_version": "2:3.28.4-0ubuntu0.16.04.12",
            "binary_name": "libnss3-dev"
        },
        {
            "binary_version": "2:3.28.4-0ubuntu0.16.04.12",
            "binary_name": "libnss3-nssdb"
        },
        {
            "binary_version": "2:3.28.4-0ubuntu0.16.04.12",
            "binary_name": "libnss3-tools"
        }
    ],
    "availability": "No subscription required"
}

Ubuntu:18.04:LTS / nss

Package

Name
nss
Purl
pkg:deb/ubuntu/nss@2:3.35-2ubuntu2.9?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:3.35-2ubuntu2.9

Affected versions

2:3.*

2:3.32-1ubuntu3
2:3.34-1ubuntu1
2:3.35-2ubuntu2
2:3.35-2ubuntu2.1
2:3.35-2ubuntu2.2
2:3.35-2ubuntu2.3
2:3.35-2ubuntu2.5
2:3.35-2ubuntu2.6
2:3.35-2ubuntu2.7
2:3.35-2ubuntu2.8

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2:3.35-2ubuntu2.9",
            "binary_name": "libnss3"
        },
        {
            "binary_version": "2:3.35-2ubuntu2.9",
            "binary_name": "libnss3-dev"
        },
        {
            "binary_version": "2:3.35-2ubuntu2.9",
            "binary_name": "libnss3-tools"
        }
    ],
    "availability": "No subscription required"
}

Ubuntu:20.04:LTS / nss

Package

Name
nss
Purl
pkg:deb/ubuntu/nss@2:3.49.1-1ubuntu1.2?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:3.49.1-1ubuntu1.2

Affected versions

2:3.*

2:3.45-1ubuntu2
2:3.47-1ubuntu1
2:3.47-1ubuntu2
2:3.48-1ubuntu1
2:3.49.1-1ubuntu1
2:3.49.1-1ubuntu1.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2:3.49.1-1ubuntu1.2",
            "binary_name": "libnss3"
        },
        {
            "binary_version": "2:3.49.1-1ubuntu1.2",
            "binary_name": "libnss3-dev"
        },
        {
            "binary_version": "2:3.49.1-1ubuntu1.2",
            "binary_name": "libnss3-tools"
        }
    ],
    "availability": "No subscription required"
}