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ubuntuUbuntuUSN-5203-1
HistoryDec 19, 2021 - 12:00 a.m.

Apache Log4j 2 vulnerability

2021-12-1900:00:00
ubuntu.com
57

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

8.6 High

AI Score

Confidence

Low

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

0.966 High

EPSS

Percentile

99.6%

JSON

Releases

  • Ubuntu 21.10
  • Ubuntu 21.04
  • Ubuntu 20.04 LTS

Packages

  • apache-log4j2 - Apache Log4j - Logging Framework for Java

Details

Hideki Okamoto and Guy Lederfein discovered that Apache Log4j 2 did not
protect against infinite recursion in lookup evaluation. A remote attacker
could possibly use this issue to cause Apache Log4j 2 to crash, leading to
a denial of service.
Please see the following link for more information:
<https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/Log4Shell&gt;

OSVersionArchitecturePackageVersionFilename
Ubuntu21.10noarchliblog4j2-java< 2.17.0-0.21.10.1UNKNOWN
Ubuntu21.04noarchliblog4j2-java< 2.17.0-0.21.04.1UNKNOWN
Ubuntu20.04noarchliblog4j2-java< 2.17.0-0.20.04.1UNKNOWN
Ubuntu20.04noarchliblog4j2-java-doc< 2.17.0-0.20.04.1UNKNOWN

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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

8.6 High

AI Score

Confidence

Low

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

0.966 High

EPSS

Percentile

99.6%

JSON
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