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ubuntucveUbuntu.comUB:CVE-2021-45105
HistoryDec 19, 2021 - 12:00 a.m.

CVE-2021-45105

2021-12-1900:00:00
ubuntu.com
ubuntu.com
32

5.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:N/I:N/A:P

0.967 High

EPSS

Percentile

99.6%

Apache Log4j2 versions 2.0-alpha1 through 2.16.0 (excluding 2.12.3 and
2.3.1) did not protect from uncontrolled recursion from self-referential
lookups. This allows an attacker with control over Thread Context Map data
to cause a denial of service when a crafted string is interpreted. This
issue was fixed in Log4j 2.17.0, 2.12.3, and 2.3.1.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchapache-log4j2< 2.12.4-0ubuntu0.1UNKNOWN
ubuntu20.04noarchapache-log4j2< 2.17.0-0.20.04.1UNKNOWN
ubuntu21.04noarchapache-log4j2< 2.17.0-0.21.04.1UNKNOWN
ubuntu21.10noarchapache-log4j2< 2.17.0-0.21.10.1UNKNOWN

5.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:N/I:N/A:P

0.967 High

EPSS

Percentile

99.6%