cnvd - cnvd-2020-51796

cnvd-2020-51796

Vulnerability from cnvd

Title: Linux kernel信息泄露漏洞（CNVD-2020-51796）

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 before 5.8.3版本中存在信息泄露漏洞，该漏洞源于NFS客户端代码中的TOCTOU不匹配。攻击者可利用该漏洞获取敏感信息。

Severity: 中

Patch Name: Linux kernel信息泄露漏洞（CNVD-2020-51796）的补丁

Patch 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 before 5.8.3版本中存在信息泄露漏洞，该漏洞源于NFS客户端代码中的TOCTOU不匹配。攻击者可利用该漏洞获取敏感信息。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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b4487b93545214a9db8cbf32e86411677b0cca21

Reference: https://twitter.com/grsecurity/status/1303370421958578179

Impacted products

Name
Linux Linux kernel <5.8.3

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-25212",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-25212"
    }
  },
  "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 before 5.8.3\u7248\u672c\u4e2d\u5b58\u5728\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eNFS\u5ba2\u6237\u7aef\u4ee3\u7801\u4e2d\u7684TOCTOU\u4e0d\u5339\u914d\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u83b7\u53d6\u654f\u611f\u4fe1\u606f\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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b4487b93545214a9db8cbf32e86411677b0cca21",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-51796",
  "openTime": "2020-09-13",
  "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 before 5.8.3\u7248\u672c\u4e2d\u5b58\u5728\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eNFS\u5ba2\u6237\u7aef\u4ee3\u7801\u4e2d\u7684TOCTOU\u4e0d\u5339\u914d\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u83b7\u53d6\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\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e\uff08CNVD-2020-51796\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Linux Linux kernel \u003c5.8.3"
  },
  "referenceLink": "https://twitter.com/grsecurity/status/1303370421958578179",
  "serverity": "\u4e2d",
  "submitTime": "2020-09-11",
  "title": "Linux kernel\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e\uff08CNVD-2020-51796\uff09"
}

CVE-2020-25212 (GCVE-0-2020-25212)

Vulnerability from cvelistv5

Published

2020-09-09 15:52

Modified

2024-08-04 15:33

Severity ?

CWE

Summary

A TOCTOU mismatch in the NFS client code in the Linux kernel before 5.8.3 could be used by local attackers to corrupt memory or possibly have unspecified other impact because a size check is in fs/nfs/nfs4proc.c instead of fs/nfs/nfs4xdr.c, aka CID-b4487b935452.

References

▼	URL	Tags
	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b4487b93545214a9db8cbf32e86411677b0cca21	x_refsource_MISC
	https://twitter.com/grsecurity/status/1303370421958578179	x_refsource_MISC
	https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.3	x_refsource_MISC
	https://usn.ubuntu.com/4527-1/	vendor-advisory, x_refsource_UBUNTU
	https://usn.ubuntu.com/4525-1/	vendor-advisory, x_refsource_UBUNTU
	https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html	mailing-list, x_refsource_MLIST
	http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.html	vendor-advisory, x_refsource_SUSE
	https://usn.ubuntu.com/4578-1/	vendor-advisory, x_refsource_UBUNTU
	http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00035.html	vendor-advisory, x_refsource_SUSE
	http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00042.html	vendor-advisory, x_refsource_SUSE
	https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html	mailing-list, x_refsource_MLIST
	https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html	mailing-list, x_refsource_MLIST

Impacted products

	Vendor	Product	Version
	n/a	n/a	Version: n/a

Show details on NVD website

JSON

To clipboard

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}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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