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GHSA-23j4-mw76-5v7h

GHSA-23j4-mw76-5v7h · Scrapy allows redirect following in protocols other than HTTP

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### Impact Scrapy was following redirects regardless of the URL protocol, so redirects were working for `data://`, `file://`, `ftp://`, `s3://`, and any other scheme defined in the `DOWNLOAD_HANDLERS` setting. However, HTTP redirects should only work between URLs that use the `http://` or `https://` schemes. A malicious actor, given write access to the start requests (e.g. ability to define `start_urls`) of a spider and read access to the spider output, could exploit this vulnerability to: - Redirect to any local file using the `file://` scheme to read its contents. - Redirect to an `ftp://` URL of a malicious FTP server to obtain the FTP username and password configured in the spider or project. - Redirect to any `s3://` URL to read its content using the S3 credentials configured in the spider or project. For `file://` and `s3://`, how the spider implements its parsing of input data into an output item determines what data would be vulnerable. A spider that always outputs the entire contents of a response would be completely vulnerable, while a spider that extracted only fragments from the response could significantly limit vulnerable data. ### Patches Upgrade to Scrapy 2.11.2. ### Workarounds Replace the built-in retry middlewares (`RedirectMiddleware` and `MetaRefreshMiddleware`) with custom ones that implement the fix from Scrapy 2.11.2, and verify that they work as intended. ### References This security issue was reported by @mvsantos at https://github.com/scrapy/scrapy/issues/457.

CVSS 6.5 · Mittel · Korrektur verfügbar

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Technologie-Stack: python

Betroffene Produkte und Versionen

  • scrapy PyPI

    Softwareversionen
    • 0.10.4.2364
    • 0.12.0.2550
    • 0.14.1
    • 0.14.2
    • 0.14.3
    • 0.14.4
    • 0.16.0
    • 0.16.1
    • 0.16.2
    • 0.16.3
    • 0.16.4
    • 0.16.5
    • 0.18.0
    • 0.18.1
    • 0.18.2
    • 0.18.3
    • 0.18.4
    • 0.20.0
    • 0.20.1
    • 0.20.2
    • 0.22.0
    • 0.22.1
    • 0.22.2
    • 0.24.0
    • 0.24.1
    • 0.24.2
    • 0.24.3
    • 0.24.4
    • 0.24.5
    • 0.24.6
    • 0.7
    • 0.8
    • 0.9
    • 1.0.0
    • 1.0.0rc1
    • 1.0.0rc2
    • 1.0.0rc3
    • 1.0.1
    • 1.0.2
    • 1.0.3
    • 1.0.4
    • 1.0.5
    • 1.0.6
    • 1.0.7
    • 1.1.0
    • 1.1.0rc1
    • 1.1.0rc2
    • 1.1.0rc3
    • 1.1.0rc4
    • 1.1.1
    • 1.1.2
    • 1.1.3
    • 1.1.4
    • 1.2.0
    • 1.2.1
    • 1.2.2
    • 1.2.3
    • 1.3.0
    • 1.3.1
    • 1.3.2
    • 1.3.3
    • 1.4.0
    • 1.5.0
    • 1.5.1
    • 1.5.2
    • 1.6.0
    • 1.7.0
    • 1.7.1
    • 1.7.2
    • 1.7.3
    • 1.7.4
    • 1.8.0
    • 1.8.1
    • 1.8.2
    • 1.8.3
    • 1.8.4
    • 2.0.0
    • 2.0.1
    • 2.1.0
    • 2.10.0
    • 2.10.1
    • 2.11.0
    • 2.11.1
    • 2.2.0
    • 2.2.1
    • 2.3.0
    • 2.4.0
    • 2.4.1
    • 2.5.0
    • 2.5.1
    • 2.6.0
    • 2.6.1
    • 2.6.2
    • 2.6.3
    • 2.7.0
    • 2.7.1
    • 2.8.0
    • 2.9.0
    Betroffene Versionsbereiche
    • ECOSYSTEM: < 2.11.2

    Auf 2.11.2 aktualisieren

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