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[email protected]CVE-2021-45046

HistoryDec 14, 2021 - 7:15 p.m.

CVE-2021-45046

2021-12-1419:15:07

CWE-917

[email protected]

web.nvd.nist.gov

1208

In Wild

137

cve-2021-45046

apache log4j

security vulnerability

remote code execution

information leak

jndi

nvd

5.1 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

HIGH

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

9 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

9.4 High

AI Score

Confidence

High

0.976 High

EPSS

Percentile

100.0%

JSON

It was found that the fix to address CVE-2021-44228 in Apache Log4j 2.15.0 was incomplete in certain non-default configurations. This could allows attackers with control over Thread Context Map (MDC) input data when the logging configuration uses a non-default Pattern Layout with either a Context Lookup (for example, $${ctx:loginId}) or a Thread Context Map pattern (%X, %mdc, or %MDC) to craft malicious input data using a JNDI Lookup pattern resulting in an information leak and remote code execution in some environments and local code execution in all environments. Log4j 2.16.0 (Java 8) and 2.12.2 (Java 7) fix this issue by removing support for message lookup patterns and disabling JNDI functionality by default.

Affected configurations

Vulners

NVD

Node

apachelog4jRange≤2.16.0

CPENameOperatorVersion
apache:log4japache log4jlt2.12.2
apache:log4japache log4jlt2.16.0
apache:log4japache log4jeq2.0

CPE	Name	Operator	Version
apache:log4j	apache log4j	lt	2.12.2
apache:log4j	apache log4j	lt	2.16.0
apache:log4j	apache log4j	eq	2.0

CNA Affected

[
  {
    "product": "Apache Log4j",
    "vendor": "Apache Software Foundation",
    "versions": [
      {
        "lessThan": "2.16.0",
        "status": "affected",
        "version": "Apache Log4j2",
        "versionType": "custom"
      }
    ]
  }
]