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GHSA-H5G7-X752-WJH8

Vulnerability from github – Published: 2022-05-24 17:16 – Updated: 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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    },
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}

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

Vulnerability from cvelistv5 – Published: 2020-04-23 23:55 – Updated: 2024-09-16 16:58

Title

Mishandling of file-system uid/gid with namespaces in shiftfs

Summary

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

Assigner

canonical mitre root

References

3 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/+…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
Ubuntu	Shiftfs in the Linux kernel	Affected: 5.3.0-11.12 , < 5.3 kernel* (custom) Affected: 5.0 kernel , < 5.0.0-35.38 (custom)

Date Public

2019-11-12 00:00

Credits

Jann Horn of Google Project Zero

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.