github - ghsa-442r-3r9f-48cm

GHSA-442R-3R9F-48CM

Vulnerability from github – Published: 2022-05-24 17:27 – Updated: 2023-02-03 00:30

Details

get_gate_page in mm/gup.c in the Linux kernel 5.7.x and 5.8.x before 5.8.7 allows privilege escalation because of incorrect reference counting (caused by gate page mishandling) of the struct page that backs the vsyscall page. The result is a refcount underflow. This can be triggered by any 64-bit process that can use ptrace() or process_vm_readv(), aka CID-9fa2dd946743.

Severity ?

7.8 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2020-25221"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-672"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2020-09-10T14:15:00Z",
    "severity": "HIGH"
  },
  "details": "get_gate_page in mm/gup.c in the Linux kernel 5.7.x and 5.8.x before 5.8.7 allows privilege escalation because of incorrect reference counting (caused by gate page mishandling) of the struct page that backs the vsyscall page. The result is a refcount underflow. This can be triggered by any 64-bit process that can use ptrace() or process_vm_readv(), aka CID-9fa2dd946743.",
  "id": "GHSA-442r-3r9f-48cm",
  "modified": "2023-02-03T00:30:17Z",
  "published": "2022-05-24T17:27:50Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-25221"
    },
    {
      "type": "WEB",
      "url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/linus/8891adc61dce2a8a41fc0c23262b681c3ec4b73a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/linus/9fa2dd946743ae6f30dc4830da19147bf100a7f2"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20201001-0003"
    },
    {
      "type": "WEB",
      "url": "https://www.openwall.com/lists/oss-security/2020/09/08/4"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2020/09/10/4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2020-25221 (GCVE-0-2020-25221)

Vulnerability from cvelistv5 – Published: 2020-09-10 13:39 – Updated: 2024-08-04 15:33

Summary

Severity ?

No CVSS data available.

CWE

Assigner

mitre

References

URL

Tags

	https://www.openwall.com/lists/oss-security/2020/…	x_refsource_MISC
	https://git.kernel.org/linus/9fa2dd946743ae6f30dc…	x_refsource_MISC
	https://git.kernel.org/linus/8891adc61dce2a8a41fc…	x_refsource_MISC
	https://cdn.kernel.org/pub/linux/kernel/v5.x/Chan…	x_refsource_MISC
	http://www.openwall.com/lists/oss-security/2020/09/10/4	mailing-listx_refsource_MLIST
	https://security.netapp.com/advisory/ntap-2020100…	x_refsource_CONFIRM

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JSON

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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.

Action not permitted

GHSA-442R-3R9F-48CM

CVE-2020-25221 (GCVE-0-2020-25221)

Tags

Sightings

Nomenclature