[email protected]CVE-2021-45105

HistoryDec 18, 2021 - 12:15 p.m.

CVE-2021-45105

2021-12-1812:15:07

CWE-20

CWE-674

[email protected]

web.nvd.nist.gov

752

In Wild

apache

log4j2

vulnerability

cve-2021-45105

nvd

security

denial of service

4.3 Medium

CVSS2

Attack Vector

NETWORK

Attack 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

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

7.5 High

AI Score

Confidence

Low

0.966 High

EPSS

Percentile

99.6%

JSON

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.

Affected configurations

Vulners

NVD

Node

apacheapacheRange≤2.17.0

CPENameOperatorVersion
apache:log4japache log4jlt2.3.1
apache:log4japache log4jlt2.12.3
apache:log4japache log4jle2.16.0

CPE	Name	Operator	Version
apache:log4j	apache log4j	lt	2.3.1
apache:log4j	apache log4j	lt	2.12.3
apache:log4j	apache log4j	le	2.16.0

CNA Affected

[
  {
    "product": "Apache Log4j2",
    "vendor": "Apache Software Foundation",
    "versions": [
      {
        "changes": [
          {
            "at": "2.13.0",
            "status": "affected"
          },
          {
            "at": "2.12.3",
            "status": "unaffected"
          },
          {
            "at": "2.4",
            "status": "affected"
          },
          {
            "at": "2.3.1",
            "status": "unaffected"
          },
          {
            "at": "2.0-alpha1",
            "status": "affected"
          }
        ],
        "lessThan": "2.17.0",
        "status": "affected",
        "version": "log4j-core",
        "versionType": "custom"
      }
    ]
  }
]