github - ghsa-h5g7-x752-wjh8

ghsa-h5g7-x752-wjh8

Vulnerability from github

Published

2022-05-24 17:16

Modified

2022-05-24 17:16

Details

In shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series, several locations which shift ids translate user/group ids before performing operations in the lower filesystem were translating them into init_user_ns, whereas they should have been translated into the s_user_ns for the lower filesystem. This resulted in using ids other than the intended ones in the lower fs, which likely did not map into the shifts s_user_ns. A local attacker could use this to possibly bypass discretionary access control permissions.

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{
  "affected": [],
  "aliases": [
    "CVE-2019-15793"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2020-04-24T00:15:00Z",
    "severity": "MODERATE"
  },
  "details": "In shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series, several locations which shift ids translate user/group ids before performing operations in the lower filesystem were translating them into init_user_ns, whereas they should have been translated into the s_user_ns for the lower filesystem. This resulted in using ids other than the intended ones in the lower fs, which likely did not map into the shifts s_user_ns. A local attacker could use this to possibly bypass discretionary access control permissions.",
  "id": "GHSA-h5g7-x752-wjh8",
  "modified": "2022-05-24T17:16:24Z",
  "published": "2022-05-24T17:16:24Z",
  "references": [
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      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-15793"
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    },
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}

CVE-2019-15793 (GCVE-0-2019-15793)

Vulnerability from cvelistv5

Published

2020-04-23 23:55

Modified

2024-09-16 16:58

Severity ?

6.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

CWE

CWE-538 - File and Directory Information Exposure

Summary

In shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series, several locations which shift ids translate user/group ids before performing operations in the lower filesystem were translating them into init_user_ns, whereas they should have been translated into the s_user_ns for the lower filesystem. This resulted in using ids other than the intended ones in the lower fs, which likely did not map into the shifts s_user_ns. A local attacker could use this to possibly bypass discretionary access control permissions.

References

URL

Tags

	https://usn.ubuntu.com/usn/usn-4183-1	x_refsource_MISC
	https://usn.ubuntu.com/usn/usn-4184-1	x_refsource_MISC
	https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=3644b9d5688da86f18e017c9c580b75cf52927bb	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	Ubuntu	Shiftfs in the Linux kernel	Version: 5.3.0-11.12 < 5.3 kernel* Version: 5.0 kernel < 5.0.0-35.38

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