| Package | Affected versions | Patched versions |
|---|---|---|
| carrierwave | ≥ 3.0.0, < 3.0.7< 2.2.6 | 3.0.72.2.6 |
| carrierwave | ≥ 3.0.0, < 3.0.7< 2.2.6 | 3.0.72.2.6 |
The vulnerability CVE-2023-49090 wasn't fully addressed.
This vulnerability is caused by the fact that when uploading to object storage, including Amazon S3, it is possible to set a Content-Type value that is interpreted by browsers to be different from what's allowed by content_type_allowlist, by providing multiple values separated by commas.
This bypassed value can be used to cause XSS.
Use the following monkey patch to let CarrierWave parse the Content-type by using Marcel::MimeType.for.
# For CarrierWave 3.x
CarrierWave::SanitizedFile.class_eval do
def declared_content_type
@declared_content_type ||
if @file.respond_to?(:content_type) && @file.content_type
Marcel::MimeType.for(declared_type: @file.content_type.to_s.chomp)
end
end
end
# For CarrierWave 2.x
CarrierWave::SanitizedFile.class_eval do
def existing_content_type
if @file.respond_to?(:content_type) && @file.content_type
Marcel::MimeType.for(declared_type: @file.content_type.to_s.chomp)
end
end
end
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