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ubuntucveUbuntu.comUB:CVE-2021-4238
HistoryDec 27, 2022 - 12:00 a.m.

CVE-2021-4238

2022-12-2700:00:00
ubuntu.com
ubuntu.com
14
randomalphanumeric
cryptorandomalphanumeric
entropy
predictable digits
unix

9.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

HIGH

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

0.002 Low

EPSS

Percentile

54.0%

Randomly-generated alphanumeric strings contain significantly less entropy
than expected. The RandomAlphaNumeric and CryptoRandomAlphaNumeric
functions always return strings containing at least one digit from 0 to 9.
This significantly reduces the amount of entropy in short strings generated
by these functions.

9.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

HIGH

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

0.002 Low

EPSS

Percentile

54.0%