Vulnerability-Lookup

CNVD-2021-28005

Vulnerability from cnvd - Published: 2021-04-14

Title

Linux kernel数据伪造问题漏洞

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的SELinux LSM中hook的实现存在数据伪造问题漏洞。攻击者可利用该漏洞绕过SELinux netlink权限检查。

Severity

低

Patch Name

Linux kernel数据伪造问题漏洞的补丁

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的SELinux LSM中hook的实现存在数据伪造问题漏洞。攻击者可利用该漏洞绕过SELinux netlink权限检查。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

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=fb73974172ffaaf57a7c42f35424d9aece1a5af6

Reference

https://nvd.nist.gov/vuln/detail/CVE-2020-10751

Impacted products

Name
Linux Linux kernel

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-10751"
    }
  },
  "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\u7684SELinux LSM\u4e2dhook\u7684\u5b9e\u73b0\u5b58\u5728\u6570\u636e\u4f2a\u9020\u95ee\u9898\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u7ed5\u8fc7SELinux netlink\u6743\u9650\u68c0\u67e5\u3002",
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  "number": "CNVD-2021-28005",
  "openTime": "2021-04-14",
  "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\u7684SELinux LSM\u4e2dhook\u7684\u5b9e\u73b0\u5b58\u5728\u6570\u636e\u4f2a\u9020\u95ee\u9898\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u7ed5\u8fc7SELinux netlink\u6743\u9650\u68c0\u67e5\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"
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  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-10751",
  "serverity": "\u4f4e",
  "submitTime": "2020-05-27",
  "title": "Linux kernel\u6570\u636e\u4f2a\u9020\u95ee\u9898\u6f0f\u6d1e"
}

CVE-2020-10751 (GCVE-0-2020-10751)

Vulnerability from cvelistv5 – Published: 2020-05-26 14:54 – Updated: 2024-08-04 11:14

Summary

A flaw was found in the Linux kernels SELinux LSM hook implementation before version 5.7, where it incorrectly assumed that an skb would only contain a single netlink message. The hook would incorrectly only validate the first netlink message in the skb and allow or deny the rest of the messages within the skb with the granted permission without further processing.

Severity

6.1 (Medium)


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

CWE

CWE-349

Assigner

redhat redhat root

References

18 references

URL	Tags
http://www.openwall.com/lists/oss-security/2020/05/27/3	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://lists.debian.org/debian-lts-announce/2020…	mailing-listx_refsource_MLIST
https://www.debian.org/security/2020/dsa-4698	vendor-advisoryx_refsource_DEBIAN
https://www.debian.org/security/2020/dsa-4699	vendor-advisoryx_refsource_DEBIAN
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
https://usn.ubuntu.com/4389-1/	vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4390-1/	vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4391-1/	vendor-advisoryx_refsource_UBUNTU
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
https://usn.ubuntu.com/4413-1/	vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4412-1/	vendor-advisoryx_refsource_UBUNTU
https://www.oracle.com/security-alerts/cpuApr2021.html	x_refsource_MISC
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2…	x_refsource_CONFIRM
https://git.kernel.org/pub/scm/linux/kernel/git/t…	x_refsource_CONFIRM
https://www.openwall.com/lists/oss-security/2020/…	x_refsource_CONFIRM
https://lore.kernel.org/selinux/CACT4Y+b8HiV6KFuA…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
The Linux Foundation	kernel	Affected: before 5.7

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.