github - ghsa-w9g5-3qgc-xmgx

GHSA-W9G5-3QGC-XMGX

Vulnerability from github – Published: 2022-05-24 17:16 – Updated: 2022-10-07 18:15

Details

Time-of-check Time-of-use Race Condition vulnerability on crash report ownership change in Apport allows for a possible privilege escalation opportunity. If fs.protected_symlinks is disabled, this can be exploited between the os.open and os.chown calls when the Apport cron script clears out crash files of size 0. A symlink with the same name as the deleted file can then be created upon which chown will be called, changing the file owner to root. Fixed in versions 2.20.1-0ubuntu2.23, 2.20.9-0ubuntu7.14, 2.20.11-0ubuntu8.8 and 2.20.11-0ubuntu22.

Severity ?

4.7 (Medium)


                  
                    CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2020-8833"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-367"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2020-04-22T22:15:00Z",
    "severity": "LOW"
  },
  "details": "Time-of-check Time-of-use Race Condition vulnerability on crash report ownership change in Apport allows for a possible privilege escalation opportunity. If fs.protected_symlinks is disabled, this can be exploited between the os.open and os.chown calls when the Apport cron script clears out crash files of size 0. A symlink with the same name as the deleted file can then be created upon which chown will be called, changing the file owner to root. Fixed in versions 2.20.1-0ubuntu2.23, 2.20.9-0ubuntu7.14, 2.20.11-0ubuntu8.8 and 2.20.11-0ubuntu22.",
  "id": "GHSA-w9g5-3qgc-xmgx",
  "modified": "2022-10-07T18:15:49Z",
  "published": "2022-05-24T17:16:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-8833"
    },
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      "url": "https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1862933"
    },
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      "type": "WEB",
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    },
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      "url": "https://usn.ubuntu.com/4315-2"
    }
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      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2020-8833 (GCVE-0-2020-8833)

Vulnerability from cvelistv5 – Published: 2020-04-22 21:15 – Updated: 2024-09-16 20:53

Title

Apport race condition in crash report permissions

Summary

Severity ?

5.6 (Medium)


                        
                          CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

CWE

CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition

Assigner

canonical

References

URL

Tags

	https://usn.ubuntu.com/4315-1/	x_refsource_CONFIRM
	https://bugs.launchpad.net/ubuntu/+source/apport/…	x_refsource_CONFIRM
	https://usn.ubuntu.com/4315-2/	vendor-advisoryx_refsource_UBUNTU

Impacted products

	Vendor	Product	Version
	Canonical	Apport	Affected: 2.20.1 , < 2.20.1-0ubuntu2.23 (custom) Affected: 2.20.9 , < 2.20.9-0ubuntu7.14 (custom) Affected: 2.20.11 , < 2.20.11-0ubuntu8.8 (custom)

Credits

Maximilien Bourgeteau

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 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.

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GHSA-W9G5-3QGC-XMGX

CVE-2020-8833 (GCVE-0-2020-8833)

Tags

Sightings

Nomenclature