Vulnerability-Lookup

CNVD-2021-14401

Vulnerability from cnvd - Published: 2021-03-04

Title

Linux kernel代码问题漏洞（CNVD-2021-14401）

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 5.11之前版本中存在代码问题漏洞。该漏洞源于当使用BT_SNDMTU/BT_RCVMTU SCO sockets时，net/bluetooth/sco.c中的sco_sock_getsockopt函数未能检查Socket连接，本地攻击者可通过该漏洞攻击系统或获得敏感信息。

Severity

高

Patch Name

Linux kernel代码问题漏洞（CNVD-2021-14401）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=1910048

Reference

https://nvd.nist.gov/vuln/detail/CVE-2020-35499

Impacted products

Name
Linux Linux kernel <5.11

Show details on source website

JSON

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  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-35499",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-35499"
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  "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 5.11\u4e4b\u524d\u7248\u672c\u4e2d\u5b58\u5728\u4ee3\u7801\u95ee\u9898\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5f53\u4f7f\u7528BT_SNDMTU/BT_RCVMTU SCO sockets\u65f6\uff0cnet/bluetooth/sco.c\u4e2d\u7684sco_sock_getsockopt\u51fd\u6570\u672a\u80fd\u68c0\u67e5Socket\u8fde\u63a5\uff0c\u672c\u5730\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u8be5\u6f0f\u6d1e\u653b\u51fb\u7cfb\u7edf\u6216\u83b7\u5f97\u654f\u611f\u4fe1\u606f\u3002",
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  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-14401",
  "openTime": "2021-03-04",
  "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 5.11\u4e4b\u524d\u7248\u672c\u4e2d\u5b58\u5728\u4ee3\u7801\u95ee\u9898\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5f53\u4f7f\u7528BT_SNDMTU/BT_RCVMTU SCO sockets\u65f6\uff0cnet/bluetooth/sco.c\u4e2d\u7684sco_sock_getsockopt\u51fd\u6570\u672a\u80fd\u68c0\u67e5Socket\u8fde\u63a5\uff0c\u672c\u5730\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u8be5\u6f0f\u6d1e\u653b\u51fb\u7cfb\u7edf\u6216\u83b7\u5f97\u654f\u611f\u4fe1\u606f\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\u4ee3\u7801\u95ee\u9898\u6f0f\u6d1e\uff08CNVD-2021-14401\uff09\u7684\u8865\u4e01",
  "products": {
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  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-35499",
  "serverity": "\u9ad8",
  "submitTime": "2021-03-03",
  "title": "Linux kernel\u4ee3\u7801\u95ee\u9898\u6f0f\u6d1e\uff08CNVD-2021-14401\uff09"
}

CVE-2020-35499 (GCVE-0-2020-35499)

Vulnerability from cvelistv5 – Published: 2021-02-19 19:49 – Updated: 2024-08-04 17:02

Summary

A NULL pointer dereference flaw in Linux kernel versions prior to 5.11 may be seen if sco_sock_getsockopt function in net/bluetooth/sco.c do not have a sanity check for a socket connection, when using BT_SNDMTU/BT_RCVMTU for SCO sockets. This could allow a local attacker with a special user privilege to crash the system (DOS) or leak kernel internal information.

Severity

No CVSS data available.

CWE

CWE-476

Assigner

redhat redhat root

References

1 reference

URL	Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1910048	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
n/a	kernel	Affected: kernel 5.11

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.