github - ghsa-vjqv-f876-5p65

GHSA-VJQV-F876-5P65

Vulnerability from github – Published: 2022-05-24 17:00 – Updated: 2024-04-04 02:37

Details

An exploitable vulnerability exists in the grsecurity PaX patch for the function read_kmem, in PaX from version pax-linux-4.9.8-test1 to 4.9.24-test7, grsecurity official from version grsecurity-3.1-4.9.8-201702060653 to grsecurity-3.1-4.9.24-201704252333, grsecurity unofficial from version v4.9.25-unofficialgrsec to v4.9.74-unofficialgrsec. PaX adds a temp buffer to the read_kmem function, which is never freed when an invalid address is supplied. This results in a memory leakage that can lead to a crash of the system. An attacker needs to induce a read to /dev/kmem using an invalid address to exploit this vulnerability.

Severity ?

5.9 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2019-5023"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-401",
      "CWE-772"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-10-31T21:15:00Z",
    "severity": "MODERATE"
  },
  "details": "An exploitable vulnerability exists in the grsecurity PaX patch for the function read_kmem, in PaX from version pax-linux-4.9.8-test1 to 4.9.24-test7, grsecurity official from version grsecurity-3.1-4.9.8-201702060653 to grsecurity-3.1-4.9.24-201704252333, grsecurity unofficial from version v4.9.25-unofficialgrsec to v4.9.74-unofficialgrsec. PaX adds a temp buffer to the read_kmem function, which is never freed when an invalid address is supplied. This results in a memory leakage that can lead to a crash of the system. An attacker needs to induce a read to /dev/kmem using an invalid address to exploit this vulnerability.",
  "id": "GHSA-vjqv-f876-5p65",
  "modified": "2024-04-04T02:37:20Z",
  "published": "2022-05-24T17:00:13Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-5023"
    },
    {
      "type": "WEB",
      "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2019-0784"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2019-5023 (GCVE-0-2019-5023)

Vulnerability from cvelistv5 – Published: 2019-10-31 20:15 – Updated: 2024-08-04 19:40

Summary

Severity ?

5.9 (Medium)


                        
                          CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H

CWE

CWE-401 - Improper Release of Memory Before Removing Last Reference

Assigner

talos

References

URL

Tags

https://talosintelligence.com/vulnerability_repor…

x_refsource_MISC

Impacted products

	Vendor	Product	Version
	n/a	PaX	Affected: PaX pax-linux-4.9.24-test7.patch (latest version available to the public) grsecurity grsecurity-3.1-4.9.24-201704252333.patch (latest official version available to the public) v4.9.74-unofficial_grsec (latest unofficial version available to the public)

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        "providerMetadata": {
          "dateUpdated": "2024-08-04T19:40:48.969Z",
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          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
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              "x_transferred"
            ],
            "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2019-0784"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
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          "product": "PaX",
          "vendor": "n/a",
          "versions": [
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              "version": "PaX pax-linux-4.9.24-test7.patch (latest version available to the public) grsecurity grsecurity-3.1-4.9.24-201704252333.patch (latest official version available to the public) v4.9.74-unofficial_grsec (latest unofficial version available to the public)"
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      ],
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        }
      ],
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          "cvssV3_0": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
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      "problemTypes": [
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          "descriptions": [
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      "providerMetadata": {
        "dateUpdated": "2022-04-19T17:32:57",
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          "ASSIGNER": "talos-cna@cisco.com",
          "ID": "CVE-2019-5023",
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            "vendor_data": [
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                      "product_name": "PaX",
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                          {
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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-VJQV-F876-5P65

CVE-2019-5023 (GCVE-0-2019-5023)

Tags

Sightings

Nomenclature