cnvd - cnvd-2022-13365

cnvd-2022-13365

Vulnerability from cnvd

Title: snapd输入验证错误漏洞

Description:

Snapd是开源的一个跨平台的包管理工具。

snapd存在输入验证错误漏洞，攻击者可利用该漏洞导致snap能够通过格式错误的内容界面和布局声明注入任意AppArmor策略规则，从而逃脱严格的snap限制。

Severity: 高

Patch Name: snapd输入验证错误漏洞的补丁

Patch Description:

Snapd是开源的一个跨平台的包管理工具。

snapd存在输入验证错误漏洞，攻击者可利用该漏洞导致snap能够通过格式错误的内容界面和布局声明注入任意AppArmor策略规则，从而逃脱严格的snap限制。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://ubuntu.com/security/notices/USN-5292-1

Reference: https://nvd.nist.gov/vuln/detail/CVE-2021-4120

Impacted products

Name
snapd snapd 2.54.2

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-4120"
    }
  },
  "description": "Snapd\u662f\u5f00\u6e90\u7684\u4e00\u4e2a\u8de8\u5e73\u53f0\u7684\u5305\u7ba1\u7406\u5de5\u5177\u3002\n\nsnapd\u5b58\u5728\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4snap\u80fd\u591f\u901a\u8fc7\u683c\u5f0f\u9519\u8bef\u7684\u5185\u5bb9\u754c\u9762\u548c\u5e03\u5c40\u58f0\u660e\u6ce8\u5165\u4efb\u610fAppArmor\u7b56\u7565\u89c4\u5219\uff0c\u4ece\u800c\u9003\u8131\u4e25\u683c\u7684snap\u9650\u5236\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://ubuntu.com/security/notices/USN-5292-1",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2022-13365",
  "openTime": "2022-02-23",
  "patchDescription": "Snapd\u662f\u5f00\u6e90\u7684\u4e00\u4e2a\u8de8\u5e73\u53f0\u7684\u5305\u7ba1\u7406\u5de5\u5177\u3002\r\n\r\nsnapd\u5b58\u5728\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4snap\u80fd\u591f\u901a\u8fc7\u683c\u5f0f\u9519\u8bef\u7684\u5185\u5bb9\u754c\u9762\u548c\u5e03\u5c40\u58f0\u660e\u6ce8\u5165\u4efb\u610fAppArmor\u7b56\u7565\u89c4\u5219\uff0c\u4ece\u800c\u9003\u8131\u4e25\u683c\u7684snap\u9650\u5236\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": "snapd\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "snapd snapd 2.54.2"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-4120",
  "serverity": "\u9ad8",
  "submitTime": "2022-02-18",
  "title": "snapd\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e"
}

CVE-2021-4120 (GCVE-0-2021-4120)

Vulnerability from cvelistv5

Published

2022-02-17 22:15

Modified

2024-08-03 17:16

Severity ?

8.2 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

CWE

CWE-20 - Improper Input Validation

Summary

snapd 2.54.2 fails to perform sufficient validation of snap content interface and layout paths, resulting in the ability for snaps to inject arbitrary AppArmor policy rules via malformed content interface and layout declarations and hence escape strict snap confinement. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and 2.54.3+21.10.1

References

▼	URL	Tags
	https://ubuntu.com/security/notices/USN-5292-1	x_refsource_MISC
	https://bugs.launchpad.net/snapd/+bug/1949368	x_refsource_MISC
	http://www.openwall.com/lists/oss-security/2022/02/18/2	mailing-list, x_refsource_MLIST
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QTBN7LLZISXIA4KU4UKDR27Q5PXDS2U/	vendor-advisory, x_refsource_FEDORA
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCGHG6LJAVJJ72TMART6A7N4Z6MSTGI7/	vendor-advisory, x_refsource_FEDORA

Impacted products

	Vendor	Product	Version
	Canonical Ltd.	snapd	Version: unspecified <

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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