GHSA-CV55-V6RW-7R5V

Vulnerability from github – Published: 2024-04-10 17:14 – Updated: 2024-04-10 22:01
VLAI?
Summary
XWiki Platform remote code execution from account via custom skins support
Details

Impact

Any user who can edit any page like their profile can create a custom skin with a template override that is executed with programming right, thus allowing remote code execution.

To reproduce, as a user without edit, script or admin right, add an object of class XWiki.XWikiSkins to your profile. Name it whatever you want and set the Base Skin to flamingo. Add an object of class XWikiSkinFileOverrideClass and set the path to macros.vm and the content to:

#macro(mediumUserAvatar $username)
  #resizedUserAvatar($username 50)
  $services.logging.getLogger('Skin').error("I got programming: $services.security.authorization.hasAccess('programming')")
#end

Back to your profile, click Test this skin. Force a refresh, just in case. If the error "Skin - I got programming: true" gets logged, the installation is vulnerable.

Patches

This has been patched in XWiki 14.10.19, 15.5.4 and 15.10RC1.

Workarounds

We're not aware of any workaround except upgrading.

References

  • https://jira.xwiki.org/browse/XWIKI-21478
  • https://github.com/xwiki/xwiki-platform/commit/3d4dbb41f52d1a6e39835cfb1695ca6668605a39 (>= 15.8 RC1)
  • https://github.com/xwiki/xwiki-platform/commit/da177c3c972e797d92c1a31e278f946012c41b56 (< 15.8 RC1)
Severity ?
9.9 (Critical)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Show details on source website
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.xwiki.platform:xwiki-platform-oldcore"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.4-milestone-1"
            },
            {
              "fixed": "14.10.19"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.xwiki.platform:xwiki-platform-oldcore"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "15.0-rc-1"
            },
            {
              "fixed": "15.5.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.xwiki.platform:xwiki-platform-oldcore"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "15.6-rc-1"
            },
            {
              "fixed": "15.10-rc-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-31987"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-04-10T17:14:47Z",
    "nvd_published_at": "2024-04-10T21:15:07Z",
    "severity": "CRITICAL"
  },
  "details": "### Impact\nAny user who can edit any page like their profile can create a custom skin with a template override that is executed with programming right, thus allowing remote code execution. \n\nTo reproduce, as a user without edit, script or admin right, add an object of class `XWiki.XWikiSkins` to your profile. Name it whatever you want and set the Base Skin to `flamingo`.\nAdd an object of class `XWikiSkinFileOverrideClass` and set the path to `macros.vm` and the content to:\n```\n#macro(mediumUserAvatar $username)\n  #resizedUserAvatar($username 50)\n  $services.logging.getLogger(\u0027Skin\u0027).error(\"I got programming: $services.security.authorization.hasAccess(\u0027programming\u0027)\")\n#end\n```\nBack to your profile, click `Test this skin`. Force a refresh, just in case.\nIf the error \"Skin - I got programming: true\" gets logged, the installation is vulnerable.\n\n### Patches\nThis has been patched in XWiki 14.10.19, 15.5.4 and 15.10RC1.\n\n### Workarounds\nWe\u0027re not aware of any workaround except upgrading.\n\n### References\n* https://jira.xwiki.org/browse/XWIKI-21478\n* https://github.com/xwiki/xwiki-platform/commit/3d4dbb41f52d1a6e39835cfb1695ca6668605a39 (\u003e= 15.8 RC1)\n* https://github.com/xwiki/xwiki-platform/commit/da177c3c972e797d92c1a31e278f946012c41b56 (\u003c 15.8 RC1)\n",
  "id": "GHSA-cv55-v6rw-7r5v",
  "modified": "2024-04-10T22:01:40Z",
  "published": "2024-04-10T17:14:47Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-cv55-v6rw-7r5v"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-31987"
    },
    {
      "type": "WEB",
      "url": "https://github.com/xwiki/xwiki-platform/commit/3d4dbb41f52d1a6e39835cfb1695ca6668605a39"
    },
    {
      "type": "WEB",
      "url": "https://github.com/xwiki/xwiki-platform/commit/626d2a5dbf95b4e719ae13bf1a0a9c76e4edd5a2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/xwiki/xwiki-platform/commit/da177c3c972e797d92c1a31e278f946012c41b56"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/xwiki/xwiki-platform"
    },
    {
      "type": "WEB",
      "url": "https://jira.xwiki.org/browse/XWIKI-21478"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "XWiki Platform remote code execution from account via custom skins support"
}


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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.



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