Drupal core Un-restricted Upload of File

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2022-01-18
• EPSS: 36% chance of exploitation in the next 30 days (higher than 98% of CVEs)

[ Description ]Official description

Drupal core does not properly sanitize certain filenames on uploaded files, which can lead to files being interpreted as the incorrect extension and served as the wrong MIME type or executed as PHP for certain hosting configurations. This issue affects: Drupal Drupal Core 9.0 versions prior to 9.0.8, 8.9 versions prior to 8.9.9, 8.8 versions prior to 8.8.11, and 7 versions prior to 7.74.

CISA: Improper sanitization in the extension file names is present in Drupal core.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 18 Jul 2022): Apply updates per vendor instructions.

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/messag…Mailing ListRelease Notes
• lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/messag…Mailing ListRelease Notes
• www.drupal.org/sa-core-2020-012Vendor Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource