github - ghsa-pm23-3px3-qrh7

GHSA-PM23-3PX3-QRH7

Vulnerability from github – Published: 2024-08-26 00:30 – Updated: 2024-09-12 21:32

Details

A bug in the 9p authentication implementation within lib9p allows an attacker with an existing valid user within the configured auth server to impersonate any other valid filesystem user.

This is due to lib9p not properly verifying that the uname given in the Tauth and Tattach 9p messages matches the client UID returned from the factotum authentication handshake.

The only filesystem making use of these functions within the base 9front systems is the experimental hjfs disk filesystem, other disk filesystems (cwfs and gefs) are not affected by this bug.

This bug was inherited from Plan 9 and is present in all versions of 9front and is remedied fully in commit 9645ae07eb66a59015e3e118d0024790c37400da.

Severity ?

6.5 (Medium)


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

8.8 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/AU:N/V:C/RE:L/U:Red

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{
  "affected": [],
  "aliases": [
    "CVE-2024-8158"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-639"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-08-25T22:15:05Z",
    "severity": "HIGH"
  },
  "details": "A bug in the 9p authentication implementation within lib9p allows an attacker with an existing valid user within the configured auth server to impersonate any other valid filesystem user.\n\nThis is due to lib9p not properly verifying that the uname given in the Tauth and Tattach 9p messages matches the client UID returned from the factotum authentication handshake.\n\n\nThe only filesystem making use of these functions within the base 9front systems is the experimental hjfs disk filesystem, other disk filesystems (cwfs and gefs) are not affected by this bug.\n\nThis bug was inherited from Plan 9 and is present in all versions of 9front and is remedied fully in commit 9645ae07eb66a59015e3e118d0024790c37400da.",
  "id": "GHSA-pm23-3px3-qrh7",
  "modified": "2024-09-12T21:32:00Z",
  "published": "2024-08-26T00:30:54Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-8158"
    },
    {
      "type": "WEB",
      "url": "https://git.9front.org/plan9front/plan9front/07aa9bfeef55ca987d411115adcfbbd4390ecf34/commit.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:X/V:C/RE:L/U:Red",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2024-8158 (GCVE-0-2024-8158)

Vulnerability from cvelistv5 – Published: 2024-08-25 21:31 – Updated: 2024-08-26 15:22

Summary

A bug in the 9p authentication implementation within lib9p allows an attacker with an existing valid user within the configured auth server to impersonate any other valid filesystem user. This is due to lib9p not properly verifying that the uname given in the Tauth and Tattach 9p messages matches the client UID returned from the factotum authentication handshake. The only filesystem making use of these functions within the base 9front systems is the experimental hjfs disk filesystem, other disk filesystems (cwfs and gefs) are not affected by this bug. This bug was inherited from Plan 9 and is present in all versions of 9front and is remedied fully in commit 9645ae07eb66a59015e3e118d0024790c37400da.

Severity ?

8.8 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/AU:N/V:C/RE:L/U:Red

CWE

CWE-639 - Authorization Bypass Through User-Controlled Key

Assigner

9front

References

URL

Tags

https://git.9front.org/plan9front/plan9front/07aa…

patch

Impacted products

	Vendor	Product	Version
	9front	9front	Affected: 0 , < 9645ae07eb66a59015e3e118d0024790c37400da (Commit Hash)

Credits

humm Jacob Moody cinap_lenrek

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "affected": [
          {
            "cpes": [
              "cpe:2.3:a:9front:9front:*:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "9front",
            "vendor": "9front",
            "versions": [
              {
                "lessThan": "9645ae07eb66a59015e3e118d0024790c37400da",
                "status": "affected",
                "version": "0",
                "versionType": "custom"
              }
            ]
          }
        ],
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-8158",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-08-26T15:20:06.656882Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-08-26T15:22:18.885Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "modules": [
            "lib9p",
            "hjfs"
          ],
          "product": "9front",
          "repo": "http://git.9front.org/plan9front/plan9front/HEAD/info.html",
          "vendor": "9front",
          "versions": [
            {
              "lessThan": "9645ae07eb66a59015e3e118d0024790c37400da",
              "status": "affected",
              "version": "0",
              "versionType": "Commit Hash"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "humm"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Jacob Moody"
        },
        {
          "lang": "en",
          "type": "remediation reviewer",
          "value": "cinap_lenrek"
        }
      ],
      "datePublic": "2024-08-24T21:58:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cdiv\u003eA bug in the 9p authentication implementation within lib9p allows an attacker with an existing valid user within the configured auth server to impersonate any other valid filesystem user.\u003c/div\u003e\u003cdiv\u003eThis is due to lib9p not properly verifying that the uname given in the Tauth and Tattach 9p messages matches the client UID returned from the factotum authentication handshake.\u003cbr\u003e\u003c/div\u003e\u003cdiv\u003eThe only filesystem making use of these functions within the base 9front systems is the experimental hjfs disk filesystem, other disk filesystems (cwfs and gefs) are not affected by this bug.\u003c/div\u003e\u003cdiv\u003eThis bug was inherited from Plan 9 and is present in all versions of 9front and is remedied fully in commit 9645ae07eb66a59015e3e118d0024790c37400da.\u003cbr\u003e\u003c/div\u003e"
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        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-114",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-114 Authentication Abuse"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NO",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "privilegesRequired": "LOW",
            "providerUrgency": "RED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "HIGH",
            "subIntegrityImpact": "HIGH",
            "userInteraction": "NONE",
            "valueDensity": "CONCENTRATED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/AU:N/V:C/RE:L/U:Red",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
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            "vulnerabilityResponseEffort": "LOW"
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          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
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          ]
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        "orgId": "1d66c9f9-fff2-411a-aa19-ca6312fa25e9",
        "shortName": "9front"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://git.9front.org/plan9front/plan9front/07aa9bfeef55ca987d411115adcfbbd4390ecf34/commit.html"
        }
      ],
      "solutions": [
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            }
          ],
          "value": "Update 9front to at least commit 9645ae07eb66a59015e3e118d0024790c37400da and follow these update instructions:\n\n\n\n\n1. Make and install the now patched version of lib9p.\n\n2. Make and install the new patched version of hjfs.\n\n3. Make and install the kernel to include the patched hjfs within the kernel\u0027s paqfs."
        }
      ],
      "source": {
        "discovery": "INTERNAL"
      },
      "title": "User impersonation for lib9p based 9p fileservers",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1d66c9f9-fff2-411a-aa19-ca6312fa25e9",
    "assignerShortName": "9front",
    "cveId": "CVE-2024-8158",
    "datePublished": "2024-08-25T21:31:08.246Z",
    "dateReserved": "2024-08-25T21:25:59.746Z",
    "dateUpdated": "2024-08-26T15:22:18.885Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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-PM23-3PX3-QRH7

CVE-2024-8158 (GCVE-0-2024-8158)

Tags

Sightings

Nomenclature