GHSA-25gq-jvx2-vg9x — Silverstripe X-Forwarded-Host request hostname injection

Silverstripe X-Forwarded-Host request hostname injection

The advisory, in context

A potential hostname injection vulnerability has been found which could allow attackers to alter url resolution.

If a request contains the X-Forwarded-Host HTTP header a website would then use its value in place of the actual HTTP hostname. In cases where caching is enabled, this could allow an attacker to potentially embed a remote url as the base_url for any site. This would then cause other visitors to the site to be redirected unknowingly.

This header is necessary for servers running behind a reverse proxy (such as nginx). Such servers are likely not vulnerable to this risk.

A fix has been merged into the default installer, although existing projects which do not run behind a reverse proxy should update their htaccess as below:

<IfModule mod_headers.c>
    # Remove X-Forwarded-Host header sent as a part of any request from the web
    RequestHeader unset X-Forwarded-Host
</IfModule>

Affected packages

Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.

silverstripe/framework Packagist

Ecosystem versions

From 3.1.0 before 3.1.13

Fixed in 3.1.13

27 explicitly affected versions

3.1.0, 3.1.1, 3.1.10, 3.1.10-rc1, 3.1.10-rc2, 3.1.11, 3.1.11-rc1, 3.1.12, 3.1.13-rc1, 3.1.2, 3.1.2-rc1, 3.1.3, 3.1.3-rc1, 3.1.3-rc2, 3.1.4, 3.1.4-rc1, 3.1.5, 3.1.5-rc1, 3.1.6, 3.1.6-rc1, 3.1.6-rc2, 3.1.6-rc3, 3.1.7, 3.1.7-rc1, 3.1.8, 3.1.9, 3.1.9-rc1

View affected-version evidence

{
  "ranges": [
    {
      "events": [
        {
          "introduced": "3.1.0"
        },
        {
          "fixed": "3.1.13"
        }
      ],
      "type": "ECOSYSTEM"
    }
  ],
  "versions": [
    "3.1.0",
    "3.1.1",
    "3.1.10",
    "3.1.10-rc1",
    "3.1.10-rc2",
    "3.1.11",
    "3.1.11-rc1",
    "3.1.12",
    "3.1.13-rc1",
    "3.1.2",
    "3.1.2-rc1",
    "3.1.3",
    "3.1.3-rc1",
    "3.1.3-rc2",
    "3.1.4",
    "3.1.4-rc1",
    "3.1.5",
    "3.1.5-rc1",
    "3.1.6",
    "3.1.6-rc1",
    "3.1.6-rc2",
    "3.1.6-rc3",
    "3.1.7",
    "3.1.7-rc1",
    "3.1.8",
    "3.1.9",
    "3.1.9-rc1"
  ]
}

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Silverstripe X-Forwarded-Host request hostname injection

The advisory, in context

Affected packages

References