cnvd - cnvd-2022-07226

cnvd-2022-07226

Vulnerability from cnvd

Title: polkit pkexec权限提升漏洞

Description:

pkexec是⼀个SUID root程序，默认安装在每个主要Linux发⾏版上。

polkit pkexec权限提升漏洞，攻击者可利用该漏洞获得主机上的完全root特权。

Severity: 高

Patch Name: polkit pkexec权限提升漏洞的补丁

Patch Description:

pkexec是⼀个SUID root程序，默认安装在每个主要Linux发⾏版上。

polkit pkexec权限提升漏洞，攻击者可利用该漏洞获得主机上的完全root特权。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:

目前厂商已经发布了升级补丁以修复这个安全问题，请到厂商的主页下载： https://ubuntu.com/security/CVE-2021-4034 https://access.redhat.com/security/cve/CVE-2021-4034 https://security-tracker.debian.org/tracker/CVE-2021-4034

Impacted products

Name
Linux polkit pkexec

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-4034"
    }
  },
  "description": "pkexec\u662f\u2f00\u4e2aSUID root\u7a0b\u5e8f\uff0c\u9ed8\u8ba4\u5b89\u88c5\u5728\u6bcf\u4e2a\u4e3b\u8981Linux\u53d1\u2f8f\u7248\u4e0a\u3002\n\npolkit pkexec\u6743\u9650\u63d0\u5347\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u83b7\u5f97\u4e3b\u673a\u4e0a\u7684\u5b8c\u5168root\u7279\u6743\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u7ecf\u53d1\u5e03\u4e86\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u8fd9\u4e2a\u5b89\u5168\u95ee\u9898\uff0c\u8bf7\u5230\u5382\u5546\u7684\u4e3b\u9875\u4e0b\u8f7d\uff1a\r\nhttps://ubuntu.com/security/CVE-2021-4034\r\nhttps://access.redhat.com/security/cve/CVE-2021-4034\r\nhttps://security-tracker.debian.org/tracker/CVE-2021-4034",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2022-07226",
  "openTime": "2022-01-27",
  "patchDescription": "pkexec\u662f\u2f00\u4e2aSUID root\u7a0b\u5e8f\uff0c\u9ed8\u8ba4\u5b89\u88c5\u5728\u6bcf\u4e2a\u4e3b\u8981Linux\u53d1\u2f8f\u7248\u4e0a\u3002\r\n\r\npolkit pkexec\u6743\u9650\u63d0\u5347\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u83b7\u5f97\u4e3b\u673a\u4e0a\u7684\u5b8c\u5168root\u7279\u6743\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": "polkit pkexec\u6743\u9650\u63d0\u5347\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Linux polkit pkexec"
  },
  "serverity": "\u9ad8",
  "submitTime": "2022-01-27",
  "title": "polkit pkexec\u6743\u9650\u63d0\u5347\u6f0f\u6d1e"
}

CVE-2021-4034 (GCVE-0-2021-4034)

Vulnerability from cvelistv5

Published

2022-01-28 00:00

Modified

2025-07-30 01:37

Severity ?

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-787 - (|CWE-125)

Summary

A local privilege escalation vulnerability was found on polkit's pkexec utility. The pkexec application is a setuid tool designed to allow unprivileged users to run commands as privileged users according predefined policies. The current version of pkexec doesn't handle the calling parameters count correctly and ends trying to execute environment variables as commands. An attacker can leverage this by crafting environment variables in such a way it'll induce pkexec to execute arbitrary code. When successfully executed the attack can cause a local privilege escalation given unprivileged users administrative rights on the target machine.

References

▼	URL	Tags
	https://access.redhat.com/security/vulnerabilities/RHSB-2022-001
	https://www.qualys.com/2022/01/25/cve-2021-4034/pwnkit.txt
	https://bugzilla.redhat.com/show_bug.cgi?id=2025869
	https://gitlab.freedesktop.org/polkit/polkit/-/commit/a2bf5c9c83b6ae46cbd5c779d3055bff81ded683
	https://www.oracle.com/security-alerts/cpuapr2022.html
	http://packetstormsecurity.com/files/166196/Polkit-pkexec-Local-Privilege-Escalation.html
	http://packetstormsecurity.com/files/166200/Polkit-pkexec-Privilege-Escalation.html
	https://www.suse.com/support/kb/doc/?id=000020564
	https://cert-portal.siemens.com/productcert/pdf/ssa-330556.pdf
	https://www.starwindsoftware.com/security/sw-20220818-0001/
	https://www.secpod.com/blog/local-privilege-escalation-vulnerability-in-major-linux-distributions-cve-2021-4034/

Impacted products

	Vendor	Product	Version
	n/a	polkit	Version: all

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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