CVE-2021-35938
Vulnerability from cvelistv5
Published
2022-08-25 00:00
Modified
2024-08-04 00:40
Severity ?
Summary
A symbolic link issue was found in rpm. It occurs when rpm sets the desired permissions and credentials after installing a file. A local unprivileged user could use this flaw to exchange the original file with a symbolic link to a security-critical file and escalate their privileges on the system. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
References
secalert@redhat.comhttps://access.redhat.com/security/cve/CVE-2021-35938Vendor Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1964114Issue Tracking, Vendor Advisory
secalert@redhat.comhttps://bugzilla.suse.com/show_bug.cgi?id=1157880Exploit, Issue Tracking, Third Party Advisory
secalert@redhat.comhttps://github.com/rpm-software-management/rpm/commit/25a435e90844ea98fe5eb7bef22c1aecf3a9c033Patch, Third Party Advisory
secalert@redhat.comhttps://github.com/rpm-software-management/rpm/pull/1919Patch, Third Party Advisory
secalert@redhat.comhttps://rpm.org/wiki/Releases/4.18.0Release Notes
secalert@redhat.comhttps://security.gentoo.org/glsa/202210-22Third Party Advisory
Impacted products
n/aRPM
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T00:40:47.458Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1964114"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://bugzilla.suse.com/show_bug.cgi?id=1157880"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://access.redhat.com/security/cve/CVE-2021-35938"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://rpm.org/wiki/Releases/4.18.0"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/rpm-software-management/rpm/pull/1919"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/rpm-software-management/rpm/commit/25a435e90844ea98fe5eb7bef22c1aecf3a9c033"
          },
          {
            "name": "GLSA-202210-22",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/202210-22"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "RPM",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "Fixed in rpm v4.18.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A symbolic link issue was found in rpm. It occurs when rpm sets the desired permissions and credentials after installing a file. A local unprivileged user could use this flaw to exchange the original file with a symbolic link to a security-critical file and escalate their privileges on the system. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-59",
              "description": "CWE-59 - Improper Link Resolution Before File Access (\u0027Link Following\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-10-31T00:00:00",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1964114"
        },
        {
          "url": "https://bugzilla.suse.com/show_bug.cgi?id=1157880"
        },
        {
          "url": "https://access.redhat.com/security/cve/CVE-2021-35938"
        },
        {
          "url": "https://rpm.org/wiki/Releases/4.18.0"
        },
        {
          "url": "https://github.com/rpm-software-management/rpm/pull/1919"
        },
        {
          "url": "https://github.com/rpm-software-management/rpm/commit/25a435e90844ea98fe5eb7bef22c1aecf3a9c033"
        },
        {
          "name": "GLSA-202210-22",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.gentoo.org/glsa/202210-22"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2021-35938",
    "datePublished": "2022-08-25T00:00:00",
    "dateReserved": "2021-06-29T00:00:00",
    "dateUpdated": "2024-08-04T00:40:47.458Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-35938\",\"sourceIdentifier\":\"secalert@redhat.com\",\"published\":\"2022-08-25T20:15:09.307\",\"lastModified\":\"2022-11-29T18:06:15.997\",\"vulnStatus\":\"Analyzed\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"A symbolic link issue was found in rpm. It occurs when rpm sets the desired permissions and credentials after installing a file. A local unprivileged user could use this flaw to exchange the original file with a symbolic link to a security-critical file and escalate their privileges on the system. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.\"},{\"lang\":\"es\",\"value\":\"Se ha encontrado un problema de enlaces simb\u00f3licos en rpm. Es producido cuando rpm establece los permisos y credenciales deseados despu\u00e9s de instalar un archivo. Un usuario local no privilegiado podr\u00eda usar este fallo para cambiar el archivo original por un enlace simb\u00f3lico a un archivo cr\u00edtico para la seguridad y escalar sus privilegios en el sistema. La mayor amenaza de esta vulnerabilidad es para la confidencialidad e integridad de los datos, as\u00ed como para la disponibilidad del sistema.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"HIGH\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\",\"baseScore\":6.7,\"baseSeverity\":\"MEDIUM\"},\"exploitabilityScore\":0.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-59\"}]},{\"source\":\"secalert@redhat.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-59\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:rpm:rpm:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"4.18.0\",\"matchCriteriaId\":\"2E92EAAF-D2B5-458B-BBF4-363FD16D3931\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"A930E247-0B43-43CB-98FF-6CE7B8189835\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"142AD0DD-4CF3-4D74-9442-459CE3347E3A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"F4CFF558-3C47-480D-A2F0-BABF26042943\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"7F6FB57C-2BC7-487C-96DD-132683AEB35D\"}]}]}],\"references\":[{\"url\":\"https://access.redhat.com/security/cve/CVE-2021-35938\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://bugzilla.redhat.com/show_bug.cgi?id=1964114\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Issue Tracking\",\"Vendor Advisory\"]},{\"url\":\"https://bugzilla.suse.com/show_bug.cgi?id=1157880\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Exploit\",\"Issue Tracking\",\"Third Party Advisory\"]},{\"url\":\"https://github.com/rpm-software-management/rpm/commit/25a435e90844ea98fe5eb7bef22c1aecf3a9c033\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://github.com/rpm-software-management/rpm/pull/1919\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://rpm.org/wiki/Releases/4.18.0\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Release Notes\"]},{\"url\":\"https://security.gentoo.org/glsa/202210-22\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Third Party Advisory\"]}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.