GHSA-G4H6-QP44-WQVX

Vulnerability from github – Published: 2022-09-20 21:19 – Updated: 2022-09-20 21:19
VLAI?
Summary
XWiki.WebHome vulnerable to Improper Privilege Management in XWiki resolving groups
Details

Impact

It's possible to exploit a bug in XWikiRights resolution of groups to obtain privilege escalation.

More specifically, editing a right with the object editor leads to adding a supplementary empty value to groups which is then resolved as a reference to XWiki.WebHome page. Adding an XWikiGroup xobject to that page then transforms it to a group, any user put in that group would then obtain the privileges related to the edited right.

Note that this security issue is normally mitigated by the fact that XWiki.WebHome (and XWiki space in general) should be protected by default for edit rights.

Patches

The problem has been patched in XWiki 13.10.4 and 14.2RC1 to not consider anymore empty values in XWikiRights.

Workarounds

It's possible to workaround the problem by setting appropriate rights on XWiki.WebHome page to prevent users to edit it.

References

  • https://jira.xwiki.org/browse/XWIKI-18386
  • https://jira.xwiki.org/browse/XWIKI-15776

For more information

If you have any questions or comments about this advisory: * Open an issue in Jira XWiki.org * Email us at Security Mailing List

Severity ?
8.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.xwiki.platform:xwiki-platform-oldcore"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "11.3.7"
            },
            {
              "fixed": "13.10.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.xwiki.platform:xwiki-platform-oldcore"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "14.0-rc-1"
            },
            {
              "fixed": "14.2-rc-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2022-31166"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-269"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-09-20T21:19:52Z",
    "nvd_published_at": "2022-09-07T14:15:00Z",
    "severity": "HIGH"
  },
  "details": "### Impact\n\nIt\u0027s possible to exploit a bug in XWikiRights resolution of groups to obtain privilege escalation. \n\nMore specifically, editing a right with the object editor leads to adding a supplementary empty value to groups which is then resolved as a reference to XWiki.WebHome page. Adding an XWikiGroup xobject to that page then transforms it to a group, any user put in that group would then obtain the privileges related to the edited right.\n\nNote that this security issue is normally mitigated by the fact that XWiki.WebHome (and XWiki space in general) should be protected by default for edit rights. \n\n### Patches\n\nThe problem has been patched in XWiki 13.10.4 and 14.2RC1 to not consider anymore empty values in XWikiRights. \n\n### Workarounds\n\nIt\u0027s possible to workaround the problem by setting appropriate rights on XWiki.WebHome page to prevent users to edit it. \n\n### References\n\n* https://jira.xwiki.org/browse/XWIKI-18386\n* https://jira.xwiki.org/browse/XWIKI-15776\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [Jira XWiki.org](https://jira.xwiki.org)\n* Email us at [Security Mailing List](mailto:security@xwiki.org)\n",
  "id": "GHSA-g4h6-qp44-wqvx",
  "modified": "2022-09-20T21:19:52Z",
  "published": "2022-09-20T21:19:52Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-g4h6-qp44-wqvx"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-31166"
    },
    {
      "type": "WEB",
      "url": "https://github.com/xwiki/xwiki-platform/pull/1800"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/xwiki/xwiki-platform"
    },
    {
      "type": "WEB",
      "url": "https://jira.xwiki.org/browse/XWIKI-15776"
    },
    {
      "type": "WEB",
      "url": "https://jira.xwiki.org/browse/XWIKI-18386"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "XWiki.WebHome vulnerable to Improper Privilege Management in XWiki resolving groups"
}


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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.
  • 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.



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