Vulnerability-Lookup

CNVD-2022-01776

Vulnerability from cnvd - Published: 2022-01-08

Title

Apache log4j2拒绝服务漏洞

Description

Apache Log4j是美国阿帕奇（Apache）基金会的一款基于Java的开源日志记录工具。 Apache log4j2存在拒绝服务漏洞。当配置不当时，攻击者可以利用该漏洞造成拒绝服务攻击。

Severity

中

Patch Name

Apache log4j2拒绝服务漏洞的补丁

Patch Description

Apache Log4j是美国阿帕奇（Apache）基金会的一款基于Java的开源日志记录工具。 Apache log4j2存在拒绝服务漏洞。当配置不当时，攻击者可以利用该漏洞造成拒绝服务攻击。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://logging.apache.org/log4j/2.x/security.html。

Reference

https://mp.weixin.qq.com/s/P78P6Jt6RsNgiQAgyH8q-w

Impacted products

Name
['Apache Log4j >=2.0.1，<2.12.2', 'Apache Log4j >=2.13.0，<2.16.0']

Show details on source website

JSON

To clipboard

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CVE-2021-45046 (GCVE-0-2021-45046)

Vulnerability from cvelistv5 – Published: 2021-12-14 16:55 – Updated: 2025-10-21 23:25

Title

Apache Log4j2 Thread Context Message Pattern and Context Lookup Pattern vulnerable to a denial of service attack

Summary

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.

Severity ?

No CVSS data available.

CWE

CWE-917 - Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection')

Assigner

apache

References

URL

Tags

	https://psirt.global.sonicwall.com/vuln-detail/SN…	x_refsource_CONFIRM
	https://www.oracle.com/security-alerts/alert-cve-…	x_refsource_CONFIRM
	https://www.cve.org/CVERecord?id=CVE-2021-44228	x_refsource_MISC
	http://www.openwall.com/lists/oss-security/2021/12/14/4	mailing-listx_refsource_MLIST
	https://logging.apache.org/log4j/2.x/security.html	x_refsource_CONFIRM
	https://www.kb.cert.org/vuls/id/930724	third-party-advisoryx_refsource_CERT-VN
	https://cert-portal.siemens.com/productcert/pdf/s…	x_refsource_CONFIRM
	https://www.intel.com/content/www/us/en/security-…	x_refsource_CONFIRM
	https://tools.cisco.com/security/center/content/C…	vendor-advisoryx_refsource_CISCO
	http://www.openwall.com/lists/oss-security/2021/12/15/3	mailing-listx_refsource_MLIST
	https://cert-portal.siemens.com/productcert/pdf/s…	x_refsource_CONFIRM
	https://www.debian.org/security/2021/dsa-5022	vendor-advisoryx_refsource_DEBIAN
	http://www.openwall.com/lists/oss-security/2021/12/18/1	mailing-listx_refsource_MLIST
	https://cert-portal.siemens.com/productcert/pdf/s…	x_refsource_CONFIRM
	https://cert-portal.siemens.com/productcert/pdf/s…	x_refsource_CONFIRM
	https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
	https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
	https://www.oracle.com/security-alerts/cpujan2022.html	x_refsource_MISC
	https://www.oracle.com/security-alerts/cpuapr2022.html	x_refsource_MISC
	https://www.oracle.com/security-alerts/cpujul2022.html	x_refsource_MISC
	https://security.gentoo.org/glsa/202310-16

Impacted products

	Vendor	Product	Version
	Apache Software Foundation	Apache Log4j	Affected: Apache Log4j2 , < 2.16.0 (custom)

Show details on NVD website

JSON

To clipboard

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                "product": {
                  "product_data": [
                    {
                      "product_name": "Apache Log4j",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "\u003c",
                            "version_name": "Apache Log4j2",
                            "version_value": "2.16.0"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Apache Software Foundation"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "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."
            }
          ]
        },
        "generator": {
          "engine": "Vulnogram 0.0.9"
        },
        "impact": [
          {
            "other": "moderate (CVSS: 3.7 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L)"
          }
        ],
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-917 Improper Neutralization of Special Elements used in an Expression Language Statement (\u0027Expression Language Injection\u0027)"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0032",
              "refsource": "CONFIRM",
              "url": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0032"
            },
            {
              "name": "https://www.oracle.com/security-alerts/alert-cve-2021-44228.html",
              "refsource": "CONFIRM",
              "url": "https://www.oracle.com/security-alerts/alert-cve-2021-44228.html"
            },
            {
              "name": "https://www.cve.org/CVERecord?id=CVE-2021-44228",
              "refsource": "MISC",
              "url": "https://www.cve.org/CVERecord?id=CVE-2021-44228"
            },
            {
              "name": "[oss-security] 20211214 CVE-2021-45046: Apache Log4j2 Thread Context Message Pattern and Context Lookup Pattern vulnerable to a denial of service attack",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2021/12/14/4"
            },
            {
              "name": "https://logging.apache.org/log4j/2.x/security.html",
              "refsource": "CONFIRM",
              "url": "https://logging.apache.org/log4j/2.x/security.html"
            },
            {
              "name": "VU#930724",
              "refsource": "CERT-VN",
              "url": "https://www.kb.cert.org/vuls/id/930724"
            },
            {
              "name": "https://cert-portal.siemens.com/productcert/pdf/ssa-661247.pdf",
              "refsource": "CONFIRM",
              "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-661247.pdf"
            },
            {
              "name": "https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00646.html",
              "refsource": "CONFIRM",
              "url": "https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00646.html"
            },
            {
              "name": "20211210 Vulnerabilities in Apache Log4j Library Affecting Cisco Products: December 2021",
              "refsource": "CISCO",
              "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd"
            },
            {
              "name": "[oss-security] 20211215 Re: CVE-2021-45046: Apache Log4j2 Thread Context Message Pattern and Context Lookup Pattern vulnerable to a denial of service attack",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2021/12/15/3"
            },
            {
              "name": "https://cert-portal.siemens.com/productcert/pdf/ssa-714170.pdf",
              "refsource": "CONFIRM",
              "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-714170.pdf"
            },
            {
              "name": "DSA-5022",
              "refsource": "DEBIAN",
              "url": "https://www.debian.org/security/2021/dsa-5022"
            },
            {
              "name": "[oss-security] 20211218 Re: CVE-2021-45046: Apache Log4j2 Thread Context Message Pattern and Context Lookup Pattern vulnerable to a denial of service attack",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2021/12/18/1"
            },
            {
              "name": "https://cert-portal.siemens.com/productcert/pdf/ssa-397453.pdf",
              "refsource": "CONFIRM",
              "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-397453.pdf"
            },
            {
              "name": "https://cert-portal.siemens.com/productcert/pdf/ssa-479842.pdf",
              "refsource": "CONFIRM",
              "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-479842.pdf"
            },
            {
              "name": "FEDORA-2021-5c9d12a93e",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EOKPQGV24RRBBI4TBZUDQMM4MEH7MXCY/"
            },
            {
              "name": "FEDORA-2021-abbe24e41c",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SIG7FZULMNK2XF6FZRU4VWYDQXNMUGAJ/"
            },
            {
              "name": "https://www.oracle.com/security-alerts/cpujan2022.html",
              "refsource": "MISC",
              "url": "https://www.oracle.com/security-alerts/cpujan2022.html"
            },
            {
              "name": "https://www.oracle.com/security-alerts/cpuapr2022.html",
              "refsource": "MISC",
              "url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
            },
            {
              "name": "https://www.oracle.com/security-alerts/cpujul2022.html",
              "refsource": "MISC",
              "url": "https://www.oracle.com/security-alerts/cpujul2022.html"
            }
          ]
        },
        "source": {
          "discovery": "UNKNOWN"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
    "assignerShortName": "apache",
    "cveId": "CVE-2021-45046",
    "datePublished": "2021-12-14T16:55:09.000Z",
    "dateReserved": "2021-12-14T00:00:00.000Z",
    "dateUpdated": "2025-10-21T23:25:22.768Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CNVD-2022-01776

CVE-2021-45046 (GCVE-0-2021-45046)

Tags

Sightings

Nomenclature