Vulnerability-Lookup

CNVD-2021-103366

Vulnerability from cnvd - Published: 2021-12-30

Title

Jenkins访问控制错误漏洞（CNVD-2021-103366）

Description

Jenkins是Jenkins开源的一个开源自动化服务器Jenkins提供了数百个插件来支持构建，部署和自动化任何项目。 Jenkins在2.318及之前版本和LTS 2.303及之前版本存在访问控制错误漏洞，该漏洞源于在使用FilePath API时未限制代理对构建目录中libs/目录的读/写访问，允许控制代理进程的攻击者使用修改的变体替换受信任库的代码。攻击者可利用该漏洞导致Jenkins控制器进程中执行未打包的代码。

Severity

高

Patch Name

Jenkins访问控制错误漏洞（CNVD-2021-103366）的补丁

Patch Description

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2423

Reference

https://nvd.nist.gov/vuln/detail/CVE-2021-21696

Impacted products

Name
['Jenkins Jenkins <=2.318', 'Jenkins Jenkins LTS <=2.303.2']

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JSON

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    "cve": {
      "cveNumber": "CVE-2021-21696",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-21696"
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  "title": "Jenkins\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\uff08CNVD-2021-103366\uff09"
}

CVE-2021-21696 (GCVE-0-2021-21696)

Vulnerability from cvelistv5 – Published: 2021-11-04 16:30 – Updated: 2024-08-03 18:23

Summary

Jenkins 2.318 and earlier, LTS 2.303.2 and earlier does not limit agent read/write access to the libs/ directory inside build directories when using the FilePath APIs, allowing attackers in control of agent processes to replace the code of a trusted library with a modified variant. This results in unsandboxed code execution in the Jenkins controller process.

Severity

No CVSS data available.

Assigner

jenkins mitre root

References

2 references

URL	Tags
https://www.jenkins.io/security/advisory/2021-11-…	x_refsource_CONFIRM
http://www.openwall.com/lists/oss-security/2021/11/04/3	mailing-listx_refsource_MLIST

Impacted products

1 product

Vendor	Product	Version
Jenkins project	Jenkins	Affected: unspecified , ≤ 2.318 (custom) Affected: unspecified , ≤ LTS 2.303.2 (custom)

Show details on NVD website

JSON

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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.