Vulnerability-Lookup

CNVD-2021-100614

Vulnerability from cnvd - Published: 2021-12-07

Title

GNU Hurd存在未明漏洞（CNVD-2021-100614）

Description

Gnu Hurd是一个Gnu项目对Unix内核的替代品。用于实现文件系统、网络协议、文件访问控制以及其他由Unix内核或类似内核（如 Linux）实现的功能。 GNU Hurd存在安全漏洞，该漏洞源于在0.9 20210404-9之前在GNU Hurd中当尝试执行setuid可执行文件时，在一段时间内进程已经拥有了新特权，但仍然引用旧任务，并且可以通过旧进程端口访问。攻击者可利用该漏洞来获得完全的根访问权限。

Severity

高

Patch Name

GNU Hurd存在未明漏洞（CNVD-2021-100614）的补丁

Patch Description

Formal description

目前厂商已发布升级补丁以修复漏洞，详情请关注厂商主页： https://lists.gnu.org/archive/html/bug-hurd/2021-05/msg00079.html

Reference

https://www.mail-archive.com/bug-hurd@gnu.org/msg32112.html

Impacted products

Name
Gnu Hurd <0.9 20210404-9

Show details on source website

JSON

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    "cve": {
      "cveNumber": "CVE-2021-43411"
    }
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  "number": "CNVD-2021-100614",
  "openTime": "2021-12-07",
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  "title": "GNU Hurd\u5b58\u5728\u672a\u660e\u6f0f\u6d1e\uff08CNVD-2021-100614\uff09"
}

CVE-2021-43411 (GCVE-0-2021-43411)

Vulnerability from cvelistv5 – Published: 2021-11-07 17:06 – Updated: 2024-08-04 03:55

Summary

An issue was discovered in GNU Hurd before 0.9 20210404-9. When trying to exec a setuid executable, there's a window of time when the process already has the new privileges, but still refers to the old task and is accessible through the old process port. This can be exploited to get full root access.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

3 references

URL	Tags
https://lists.gnu.org/archive/html/bug-hurd/2021-…	x_refsource_MISC
https://www.mail-archive.com/bug-hurd%40gnu.org/m…	x_refsource_MISC
https://salsa.debian.org/hurd-team/hurd/-/blob/4d…	x_refsource_MISC

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.