Vulnerability-Lookup

CNVD-2020-63949

Vulnerability from cnvd - Published: 2020-11-17

Title

Linux kernel无限循环漏洞（CNVD-2020-63949）

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 5.9.2之前版本中的arch/x86/kvm/ioapic.c中的ioapic_lazy_update_eoi存在无限循环漏洞。客户端用户可利用该漏洞导致主机内核崩溃。

Severity

低

Patch Name

Linux kernel无限循环漏洞（CNVD-2020-63949）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://bugzilla.redhat.com/show_bug.cgi?id=1888886

Reference

https://nvd.nist.gov/vuln/detail/CVE-2020-27152

Impacted products

Name
Linux Linux kernel <5.9.2

Show details on source website

JSON

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  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-27152",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-27152"
    }
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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 5.9.2\u4e4b\u524d\u7248\u672c\u4e2d\u7684arch/x86/kvm/ioapic.c\u4e2d\u7684ioapic_lazy_update_eoi\u5b58\u5728\u65e0\u9650\u5faa\u73af\u6f0f\u6d1e\u3002\u5ba2\u6237\u7aef\u7528\u6237\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u4e3b\u673a\u5185\u6838\u5d29\u6e83\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://bugzilla.redhat.com/show_bug.cgi?id=1888886",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-63949",
  "openTime": "2020-11-17",
  "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 5.9.2\u4e4b\u524d\u7248\u672c\u4e2d\u7684arch/x86/kvm/ioapic.c\u4e2d\u7684ioapic_lazy_update_eoi\u5b58\u5728\u65e0\u9650\u5faa\u73af\u6f0f\u6d1e\u3002\u5ba2\u6237\u7aef\u7528\u6237\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u4e3b\u673a\u5185\u6838\u5d29\u6e83\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\u65e0\u9650\u5faa\u73af\u6f0f\u6d1e\uff08CNVD-2020-63949\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Linux Linux kernel \u003c5.9.2"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-27152",
  "serverity": "\u4f4e",
  "submitTime": "2020-11-09",
  "title": "Linux kernel\u65e0\u9650\u5faa\u73af\u6f0f\u6d1e\uff08CNVD-2020-63949\uff09"
}

CVE-2020-27152 (GCVE-0-2020-27152)

Vulnerability from cvelistv5 – Published: 2020-11-06 07:46 – Updated: 2024-08-04 16:11

Summary

An issue was discovered in ioapic_lazy_update_eoi in arch/x86/kvm/ioapic.c in the Linux kernel before 5.9.2. It has an infinite loop related to improper interaction between a resampler and edge triggering, aka CID-77377064c3a9.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

4 references

URL	Tags
https://bugzilla.kernel.org/show_bug.cgi?id=208767	x_refsource_MISC
http://www.openwall.com/lists/oss-security/2020/11/03/1	mailing-listx_refsource_MLIST
https://git.kernel.org/pub/scm/linux/kernel/git/t…	x_refsource_CONFIRM
https://cdn.kernel.org/pub/linux/kernel/v5.x/Chan…	x_refsource_CONFIRM

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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.