Vulnerability-Lookup

CNVD-2023-71721

Vulnerability from cnvd - Published: 2023-09-26

Title

Linux kernel条件竞争漏洞（CNVD-2023-71721）

Description

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在条件竞争漏洞，该漏洞源于在具有安全加密虚拟化(SEV) 的Linux kernel（ AMD处理器）中的KVM在访问GHCB页面时包含竞争条件，攻击者可利用该漏洞造成拒绝服务。

Severity

中

Patch Name

Linux kernel条件竞争漏洞（CNVD-2023-71721）的补丁

Patch Description

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在条件竞争漏洞，该漏洞源于在具有安全加密虚拟化(SEV) 的Linux kernel（ AMD处理器）中的KVM在访问GHCB页面时包含竞争条件，攻击者可利用该漏洞造成拒绝服务。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://www.tenda.com.cn/

Reference

https://github.com/peris-navince/founded-0-days/blob/main/fromNatStaticSetting/1.md

Impacted products

Name
Linux Linux kernel

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2023-4155",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2023-4155"
    }
  },
  "description": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\n\nLinux kernel\u5b58\u5728\u6761\u4ef6\u7ade\u4e89\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5728\u5177\u6709\u5b89\u5168\u52a0\u5bc6\u865a\u62df\u5316(SEV) \u7684Linux kernel\uff08 AMD\u5904\u7406\u5668\uff09\u4e2d\u7684KVM\u5728\u8bbf\u95eeGHCB\u9875\u9762\u65f6\u5305\u542b\u7ade\u4e89\u6761\u4ef6\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u62d2\u7edd\u670d\u52a1\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://www.tenda.com.cn/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2023-71721",
  "openTime": "2023-09-26",
  "patchDescription": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\r\n\r\nLinux kernel\u5b58\u5728\u6761\u4ef6\u7ade\u4e89\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5728\u5177\u6709\u5b89\u5168\u52a0\u5bc6\u865a\u62df\u5316(SEV) \u7684Linux kernel\uff08 AMD\u5904\u7406\u5668\uff09\u4e2d\u7684KVM\u5728\u8bbf\u95eeGHCB\u9875\u9762\u65f6\u5305\u542b\u7ade\u4e89\u6761\u4ef6\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\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",
  "patchName": "Linux kernel\u6761\u4ef6\u7ade\u4e89\u6f0f\u6d1e\uff08CNVD-2023-71721\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Linux Linux kernel"
  },
  "referenceLink": "https://github.com/peris-navince/founded-0-days/blob/main/fromNatStaticSetting/1.md",
  "serverity": "\u4e2d",
  "submitTime": "2023-09-12",
  "title": "Linux kernel\u6761\u4ef6\u7ade\u4e89\u6f0f\u6d1e\uff08CNVD-2023-71721\uff09"
}

CVE-2023-4155 (GCVE-0-2023-4155)

Vulnerability from cvelistv5 – Published: 2023-09-13 16:11 – Updated: 2025-02-27 20:52

Title

Sev-es / sev-snp vmgexit double fetch vulnerability

Summary

A flaw was found in KVM AMD Secure Encrypted Virtualization (SEV) in the Linux kernel. A KVM guest using SEV-ES or SEV-SNP with multiple vCPUs can trigger a double fetch race condition vulnerability and invoke the `VMGEXIT` handler recursively. If an attacker manages to call the handler multiple times, they can trigger a stack overflow and cause a denial of service or potentially guest-to-host escape in kernel configurations without stack guard pages (`CONFIG_VMAP_STACK`).

Severity

5.3 (Medium)


                        
                          CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-02-26 21:49 UTC

CWE

CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition

Assigner

redhat redhat root

References

2 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2023-4155	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2213802	issue-trackingx_refsource_REDHAT

Impacted products

6 products

Vendor	Product	Version
n/a	kernel
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9
Fedora	Fedora

Date Public

2023-08-04 00:00

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.

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CNVD-2023-71721

CVE-2023-4155 (GCVE-0-2023-4155)

Tags

Sightings

Nomenclature

Related by attack behaviour