Vulnerability-Lookup

CNVD-2021-19429

Vulnerability from cnvd - Published: 2021-03-19

Title

Linux kernel竞争条件漏洞（CNVD-2021-19429）

Description

Linux kernel是一种计算机操作系统内核，以C语言和汇编语言写成，符合POSIX标准，按GNU通用公共许可证发行。 Linux kernel 5.7.11之前版本中的mm/mmap.c存在竞争条件漏洞。该漏洞源于某些expand函数与munmap调用的页表释放操作之间存在竞争条件。目前没有详细的漏洞细节提供。

Severity

中

Patch Name

Linux kernel竞争条件漏洞（CNVD-2021-19429）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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=246c320a8cfe0b11d81a4af38fa9985ef0cc9a4c

Reference

https://nvd.nist.gov/vuln/detail/CVE-2020-29369

Impacted products

Name
Linux Linux kernel <5.7.11

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-29369",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-29369"
    }
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  "description": "Linux kernel\u662f\u4e00\u79cd\u8ba1\u7b97\u673a\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\uff0c\u4ee5C\u8bed\u8a00\u548c\u6c47\u7f16\u8bed\u8a00\u5199\u6210\uff0c\u7b26\u5408POSIX\u6807\u51c6\uff0c\u6309GNU\u901a\u7528\u516c\u5171\u8bb8\u53ef\u8bc1\u53d1\u884c\u3002\n\nLinux kernel 5.7.11\u4e4b\u524d\u7248\u672c\u4e2d\u7684mm/mmap.c\u5b58\u5728\u7ade\u4e89\u6761\u4ef6\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u67d0\u4e9bexpand\u51fd\u6570\u4e0emunmap\u8c03\u7528\u7684\u9875\u8868\u91ca\u653e\u64cd\u4f5c\u4e4b\u95f4\u5b58\u5728\u7ade\u4e89\u6761\u4ef6\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\u3002",
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  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-19429",
  "openTime": "2021-03-19",
  "patchDescription": "Linux kernel\u662f\u4e00\u79cd\u8ba1\u7b97\u673a\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\uff0c\u4ee5C\u8bed\u8a00\u548c\u6c47\u7f16\u8bed\u8a00\u5199\u6210\uff0c\u7b26\u5408POSIX\u6807\u51c6\uff0c\u6309GNU\u901a\u7528\u516c\u5171\u8bb8\u53ef\u8bc1\u53d1\u884c\u3002\r\n\r\nLinux kernel 5.7.11\u4e4b\u524d\u7248\u672c\u4e2d\u7684mm/mmap.c\u5b58\u5728\u7ade\u4e89\u6761\u4ef6\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u67d0\u4e9bexpand\u51fd\u6570\u4e0emunmap\u8c03\u7528\u7684\u9875\u8868\u91ca\u653e\u64cd\u4f5c\u4e4b\u95f4\u5b58\u5728\u7ade\u4e89\u6761\u4ef6\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Linux kernel\u7ade\u4e89\u6761\u4ef6\u6f0f\u6d1e\uff08CNVD-2021-19429\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Linux Linux kernel \u003c5.7.11"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-29369",
  "serverity": "\u4e2d",
  "submitTime": "2020-11-30",
  "title": "Linux kernel\u7ade\u4e89\u6761\u4ef6\u6f0f\u6d1e\uff08CNVD-2021-19429\uff09"
}

CVE-2020-29369 (GCVE-0-2020-29369)

Vulnerability from cvelistv5 – Published: 2020-11-28 06:20 – Updated: 2024-08-04 16:48

Summary

An issue was discovered in mm/mmap.c in the Linux kernel before 5.7.11. There is a race condition between certain expand functions (expand_downwards and expand_upwards) and page-table free operations from an munmap call, aka CID-246c320a8cfe.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

6 references

URL	Tags
https://cdn.kernel.org/pub/linux/kernel/v5.x/Chan…	x_refsource_MISC
https://git.kernel.org/pub/scm/linux/kernel/git/t…	x_refsource_MISC
https://bugs.chromium.org/p/project-zero/issues/d…	x_refsource_MISC
https://security.netapp.com/advisory/ntap-2021011…	x_refsource_CONFIRM
http://www.openwall.com/lists/oss-security/2021/02/10/6	mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/02/19/8	mailing-listx_refsource_MLIST

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.