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

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    "cve": {
      "cveNumber": "CVE-2021-45046",
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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

9 (Critical)


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

SSVC

Exploitation: active Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-02-04 19:31 UTC

CWE

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

Assigner

apache mitre root

References

22 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
https://www.cisa.gov/known-exploited-vulnerabilit…	government-resource

Impacted products

1 product

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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Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.