github - ghsa-m2px-jr9v-8hhp

ghsa-m2px-jr9v-8hhp

Vulnerability from github

Published

2022-05-13 01:53

Modified

2022-05-13 01:53

Severity ?

5.3 (Medium) - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Details

An issue was discovered in shadow 4.5. newgidmap (in shadow-utils) is setuid and allows an unprivileged user to be placed in a user namespace where setgroups(2) is permitted. This allows an attacker to remove themselves from a supplementary group, which may allow access to certain filesystem paths if the administrator has used "group blacklisting" (e.g., chmod g-rwx) to restrict access to paths. This flaw effectively reverts a security feature in the kernel (in particular, the /proc/self/setgroups knob) to prevent this sort of privilege escalation.

Show details on source website

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  "affected": [],
  "aliases": [
    "CVE-2018-7169"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-732"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2018-02-15T20:29:00Z",
    "severity": "MODERATE"
  },
  "details": "An issue was discovered in shadow 4.5. newgidmap (in shadow-utils) is setuid and allows an unprivileged user to be placed in a user namespace where setgroups(2) is permitted. This allows an attacker to remove themselves from a supplementary group, which may allow access to certain filesystem paths if the administrator has used \"group blacklisting\" (e.g., chmod g-rwx) to restrict access to paths. This flaw effectively reverts a security feature in the kernel (in particular, the /proc/self/setgroups knob) to prevent this sort of privilege escalation.",
  "id": "GHSA-m2px-jr9v-8hhp",
  "modified": "2022-05-13T01:53:16Z",
  "published": "2022-05-13T01:53:16Z",
  "references": [
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      "type": "ADVISORY",
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    },
    {
      "type": "WEB",
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    },
    {
      "type": "WEB",
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    }
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  "schema_version": "1.4.0",
  "severity": [
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      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2018-7169 (GCVE-0-2018-7169)

Vulnerability from cvelistv5

Published

2018-02-15 19:00

Modified

2024-08-05 06:24

Severity ?

CWE

n/a

Summary

An issue was discovered in shadow 4.5. newgidmap (in shadow-utils) is setuid and allows an unprivileged user to be placed in a user namespace where setgroups(2) is permitted. This allows an attacker to remove themselves from a supplementary group, which may allow access to certain filesystem paths if the administrator has used "group blacklisting" (e.g., chmod g-rwx) to restrict access to paths. This flaw effectively reverts a security feature in the kernel (in particular, the /proc/self/setgroups knob) to prevent this sort of privilege escalation.

References

►

URL

Tags

	https://bugs.launchpad.net/ubuntu/+source/shadow/+bug/1729357	x_refsource_MISC
	https://security.gentoo.org/glsa/201805-09	vendor-advisory, x_refsource_GENTOO

Impacted products

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

Show details on NVD website

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