GSD-2018-6558

Vulnerability from gsd - Updated: 2023-12-13 01:22
Details
The pam_fscrypt module in fscrypt before 0.2.4 may incorrectly restore primary and supplementary group IDs to the values associated with the root user, which allows attackers to gain privileges via a successful login through certain applications that use Linux-PAM (aka pam).
Aliases
Aliases
CVE-2018-6558
To clipboard 

{
  "GSD": {
    "alias": "CVE-2018-6558",
    "description": "The pam_fscrypt module in fscrypt before 0.2.4 may incorrectly restore primary and supplementary group IDs to the values associated with the root user, which allows attackers to gain privileges via a successful login through certain applications that use Linux-PAM (aka pam).",
    "id": "GSD-2018-6558"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2018-6558"
      ],
      "details": "The pam_fscrypt module in fscrypt before 0.2.4 may incorrectly restore primary and supplementary group IDs to the values associated with the root user, which allows attackers to gain privileges via a successful login through certain applications that use Linux-PAM (aka pam).",
      "id": "GSD-2018-6558",
      "modified": "2023-12-13T01:22:35.762123Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "security@ubuntu.com",
        "DATE_PUBLIC": "2018-08-23T17:00:00.000Z",
        "ID": "CVE-2018-6558",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "fscrypt",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "before 0.2.4"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "The fscrypt Project"
            }
          ]
        }
      },
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      "description": {
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            "value": "The pam_fscrypt module in fscrypt before 0.2.4 may incorrectly restore primary and supplementary group IDs to the values associated with the root user, which allows attackers to gain privileges via a successful login through certain applications that use Linux-PAM (aka pam)."
          }
        ]
      },
      "problemtype": {
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                "lang": "eng",
                "value": "n/a"
              }
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      },
      "references": {
        "reference_data": [
          {
            "name": "https://github.com/google/fscrypt/issues/77",
            "refsource": "MISC",
            "url": "https://github.com/google/fscrypt/issues/77"
          },
          {
            "name": "https://github.com/google/fscrypt/commit/3022c1603d968c22f147b4a2c49c4637dd1be91b",
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            "url": "https://github.com/google/fscrypt/commit/3022c1603d968c22f147b4a2c49c4637dd1be91b"
          },
          {
            "name": "https://github.com/google/fscrypt/commit/315f9b042237200174a1fb99427f74027e191d66",
            "refsource": "MISC",
            "url": "https://github.com/google/fscrypt/commit/315f9b042237200174a1fb99427f74027e191d66"
          },
          {
            "name": "https://launchpad.net/bugs/1787548",
            "refsource": "MISC",
            "url": "https://launchpad.net/bugs/1787548"
          }
        ]
      },
      "source": {
        "discovery": "UNKNOWN"
      }
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "\u003cv0.2.4",
          "affected_versions": "All versions before 0.2.4",
          "cvss_v2": "AV:N/AC:M/Au:S/C:N/I:P/A:P",
          "cvss_v3": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
          "cwe_ids": [
            "CWE-1035",
            "CWE-937"
          ],
          "date": "2023-02-14",
          "description": "The pam_fscrypt module in fscrypt before 0.2.4 may incorrectly restore primary and supplementary group IDs to the values associated with the root user, which allows attackers to gain privileges via a successful login through certain applications that use Linux-PAM (aka pam).",
          "fixed_versions": [
            "v0.2.4"
          ],
          "identifier": "CVE-2018-6558",
          "identifiers": [
            "GHSA-qj26-7grj-whg3",
            "CVE-2018-6558"
          ],
          "not_impacted": "All versions starting from 0.2.4",
          "package_slug": "go/github.com/google/fscrypt",
          "pubdate": "2021-06-23",
          "solution": "Upgrade to version 0.2.4 or above.",
          "title": "Privilege Escalation in fscrypt",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2018-6558",
            "https://github.com/google/fscrypt/issues/77",
            "https://github.com/google/fscrypt/commit/3022c1603d968c22f147b4a2c49c4637dd1be91b",
            "https://github.com/google/fscrypt/commit/315f9b042237200174a1fb99427f74027e191d66",
            "https://launchpad.net/bugs/1787548",
            "https://pkg.go.dev/vuln/GO-2020-0027",
            "https://github.com/advisories/GHSA-qj26-7grj-whg3"
          ],
          "uuid": "8db4525a-3630-42cb-9719-c96128fac5df",
          "versions": [
            {
              "commit": {
                "sha": "1e1b67dae6c3ae3b5acb5ce377b01b286c3e676b",
                "tags": [
                  "v0.2.4"
                ],
                "timestamp": "20180823181006"
              },
              "number": "v0.2.4"
            }
          ]
        },
        {
          "affected_range": "\u003cv0.2.4",
          "affected_versions": "All versions before 0.2.4",
          "cvss_v2": "AV:N/AC:M/Au:S/C:N/I:P/A:P",
          "cvss_v3": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
          "cwe_ids": [
            "CWE-1035",
            "CWE-937"
          ],
          "date": "2023-02-09",
          "description": "The pam_fscrypt module in fscrypt before 0.2.4 may incorrectly restore primary and supplementary group IDs to the values associated with the root user, which allows attackers to gain privileges via a successful login through certain applications that use Linux-PAM (aka pam).",
          "fixed_versions": [
            "v0.2.4"
          ],
          "identifier": "CVE-2018-6558",
          "identifiers": [
            "GHSA-qj26-7grj-whg3",
            "CVE-2018-6558"
          ],
          "not_impacted": "All versions starting from 0.2.4",
          "package_slug": "go/github.com/google/fscrypt/pam",
          "pubdate": "2021-06-23",
          "solution": "Upgrade to version 0.2.4 or above.",
          "title": "Privilege Escalation in fscrypt",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2018-6558",
            "https://github.com/google/fscrypt/issues/77",
            "https://github.com/google/fscrypt/commit/3022c1603d968c22f147b4a2c49c4637dd1be91b",
            "https://github.com/google/fscrypt/commit/315f9b042237200174a1fb99427f74027e191d66",
            "https://launchpad.net/bugs/1787548",
            "https://pkg.go.dev/vuln/GO-2020-0027",
            "https://github.com/advisories/GHSA-qj26-7grj-whg3"
          ],
          "uuid": "1a616ce3-7be3-4e88-8d59-4f447073a97c",
          "versions": [
            {
              "commit": {
                "sha": "1e1b67dae6c3ae3b5acb5ce377b01b286c3e676b",
                "tags": [
                  "v0.2.4"
                ],
                "timestamp": "20180823181006"
              },
              "number": "v0.2.4"
            }
          ]
        },
        {
          "affected_range": "\u003c0.2.4",
          "affected_versions": "All versions before 0.2.4",
          "cvss_v2": "AV:N/AC:M/Au:S/C:N/I:P/A:P",
          "cvss_v3": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
          "cwe_ids": [
            "CWE-1035",
            "CWE-937"
          ],
          "date": "2021-06-23",
          "description": "The pam_fscrypt module in fscrypt before 0.2.4 may incorrectly restore primary and supplementary group IDs to the values associated with the root user, which allows attackers to gain privileges via a successful login through certain applications that use Linux-PAM (aka pam).",
          "fixed_versions": [
            "0.2.4"
          ],
          "identifier": "CVE-2018-6558",
          "identifiers": [
            "GHSA-qj26-7grj-whg3",
            "CVE-2018-6558"
          ],
          "not_impacted": "All versions starting from 0.2.4",
          "package_slug": "go/github.com/google/fscrypt/security",
          "pubdate": "2021-06-23",
          "solution": "Upgrade to version 0.2.4 or above.",
          "title": "Privilege Escalation in fscrypt",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2018-6558",
            "https://github.com/google/fscrypt/issues/77",
            "https://github.com/google/fscrypt/commit/3022c1603d968c22f147b4a2c49c4637dd1be91b",
            "https://github.com/google/fscrypt/commit/315f9b042237200174a1fb99427f74027e191d66",
            "https://github.com/advisories/GHSA-qj26-7grj-whg3"
          ],
          "uuid": "10563cd2-9dd3-4c2a-a10d-f35c4f119d50"
        }
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    "nvd.nist.gov": {
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        "nodes": [
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            "children": [],
            "cpe_match": [
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                "cpe23Uri": "cpe:2.3:a:google:fscrypt:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "0.2.4",
                "vulnerable": true
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          "ID": "CVE-2018-6558"
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              "value": "The pam_fscrypt module in fscrypt before 0.2.4 may incorrectly restore primary and supplementary group IDs to the values associated with the root user, which allows attackers to gain privileges via a successful login through certain applications that use Linux-PAM (aka pam)."
            }
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              "name": "https://launchpad.net/bugs/1787548",
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                "Patch",
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            },
            {
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      "impact": {
        "baseMetricV2": {
          "cvssV2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "NETWORK",
            "authentication": "SINGLE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 4.9,
            "confidentialityImpact": "NONE",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:M/Au:S/C:N/I:P/A:P",
            "version": "2.0"
          },
          "exploitabilityScore": 6.8,
          "impactScore": 4.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.0"
          },
          "exploitabilityScore": 2.8,
          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2019-10-03T00:03Z",
      "publishedDate": "2018-08-23T19:29Z"
    }
  }
}


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  • 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.
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  • 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.