Vulnerability-Lookup

CNVD-2020-23406

Vulnerability from cnvd - Published: 2020-04-17

Title

Linux kernel缓冲区溢出漏洞（CNVD-2020-23406）

Description

Linux kernel是美国Linux基金会发布的开源操作系统Linux所使用的内核。 Linux kernel 5.6.2及之前版本中的mm/mempolicy.c文件的mpol_parse_str存在缓冲区溢出漏洞，该漏洞源于程序未能正确处理空的节点列表。攻击者可借助特制的请求利用该漏洞执行任意代码或造成拒绝服务。

Severity

中

Patch Name

Linux kernel缓冲区溢出漏洞（CNVD-2020-23406）的补丁

Patch Description

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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=aa9f7d5172fac9bf1f09e678c35e287a40a7b7dd

Impacted products

Name
Linux Linux kernel <=5.6.2

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-11565"
    }
  },
  "description": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u53d1\u5e03\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\n\nLinux kernel 5.6.2\u53ca\u4e4b\u524d\u7248\u672c\u4e2d\u7684mm/mempolicy.c\u6587\u4ef6\u7684mpol_parse_str\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u672a\u80fd\u6b63\u786e\u5904\u7406\u7a7a\u7684\u8282\u70b9\u5217\u8868\u3002\u653b\u51fb\u8005\u53ef\u501f\u52a9\u7279\u5236\u7684\u8bf7\u6c42\u5229\u7528\u8be5\u6f0f\u6d1e\u6267\u884c\u4efb\u610f\u4ee3\u7801\u6216\u9020\u6210\u62d2\u7edd\u670d\u52a1\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1a\r\nhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=aa9f7d5172fac9bf1f09e678c35e287a40a7b7dd",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-23406",
  "openTime": "2020-04-17",
  "patchDescription": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u53d1\u5e03\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\r\n\r\nLinux kernel 5.6.2\u53ca\u4e4b\u524d\u7248\u672c\u4e2d\u7684mm/mempolicy.c\u6587\u4ef6\u7684mpol_parse_str\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u672a\u80fd\u6b63\u786e\u5904\u7406\u7a7a\u7684\u8282\u70b9\u5217\u8868\u3002\u653b\u51fb\u8005\u53ef\u501f\u52a9\u7279\u5236\u7684\u8bf7\u6c42\u5229\u7528\u8be5\u6f0f\u6d1e\u6267\u884c\u4efb\u610f\u4ee3\u7801\u6216\u9020\u6210\u62d2\u7edd\u670d\u52a1\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",
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  "products": {
    "product": "Linux Linux kernel \u003c=5.6.2"
  },
  "serverity": "\u4e2d",
  "submitTime": "2020-04-07",
  "title": "Linux kernel\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff08CNVD-2020-23406\uff09"
}

CVE-2020-11565 (GCVE-0-2020-11565)

Vulnerability from cvelistv5 – Published: 2020-04-06 00:08 – Updated: 2024-08-04 11:35 Disputed

Summary

An issue was discovered in the Linux kernel through 5.6.2. mpol_parse_str in mm/mempolicy.c has a stack-based out-of-bounds write because an empty nodelist is mishandled during mount option parsing, aka CID-aa9f7d5172fa. NOTE: Someone in the security community disagrees that this is a vulnerability because the issue “is a bug in parsing mount options which can only be specified by a privileged user, so triggering the bug does not grant any powers not already held.”

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-06-26 19:42 UTC

CWE

Assigner

mitre mitre root

References

12 references

URL	Tags
https://github.com/torvalds/linux/commit/aa9f7d51…	x_refsource_MISC
https://git.kernel.org/cgit/linux/kernel/git/torv…	x_refsource_MISC
https://www.debian.org/security/2020/dsa-4667	vendor-advisoryx_refsource_DEBIAN
https://usn.ubuntu.com/4364-1/	vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4367-1/	vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4368-1/	vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4363-1/	vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4369-1/	vendor-advisoryx_refsource_UBUNTU
https://lists.debian.org/debian-lts-announce/2020…	mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2020…	mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2020…	mailing-listx_refsource_MLIST
https://www.debian.org/security/2020/dsa-4698	vendor-advisoryx_refsource_DEBIAN

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.