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ubuntucveUbuntu.comUB:CVE-2020-12402
HistoryJun 19, 2020 - 12:00 a.m.

CVE-2020-12402

2020-06-1900:00:00
ubuntu.com
ubuntu.com
13

CVSS2

1.2

Attack Vector

LOCAL

Attack Complexity

HIGH

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:L/AC:H/Au:N/C:P/I:N/A:N

CVSS3

4.4

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N

EPSS

0.001

Percentile

29.0%

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.

Bugs

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchnss< 2:3.35-2ubuntu2.9UNKNOWN
ubuntu19.10noarchnss< 2:3.45-1ubuntu2.4UNKNOWN
ubuntu20.04noarchnss< 2:3.49.1-1ubuntu1.2UNKNOWN
ubuntu14.04noarchnss< 2:3.28.4-0ubuntu0.14.04.5+esm6UNKNOWN
ubuntu16.04noarchnss< 2:3.28.4-0ubuntu0.16.04.12UNKNOWN

CVSS2

1.2

Attack Vector

LOCAL

Attack Complexity

HIGH

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:L/AC:H/Au:N/C:P/I:N/A:N

CVSS3

4.4

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N

EPSS

0.001

Percentile

29.0%