FreeBSD VuXML: Documenting security issues in FreeBSD and the FreeBSD Ports Collection

rubygem-paperclip -- validation bypass vulnerabilitiy

Affected packages
rubygem-paperclip < 4.2.2

Details

VuXML ID 0f154810-16e4-11e5-a1cf-002590263bf5
Discovery 2015-06-05
Entry 2015-06-22

Jon Yurek reports:

Thanks to MORI Shingo of DeNA Co., Ltd. for reporting this.

There is an issue where if an HTML file is uploaded with a .html extension, but the content type is listed as being `image/jpeg`, this will bypass a validation checking for images. But it will also pass the spoof check, because a file named .html and containing actual HTML passes the spoof check.

This change makes it so that we also check the supplied content type. So even if the file contains HTML and ends with .html, it doesn't match the content type of `image/jpeg` and so it fails.

References

CVE Name CVE-2015-2963
URL http://jvn.jp/en/jp/JVN83881261/index.html
URL https://github.com/thoughtbot/paperclip/commit/9aee4112f36058cd28d5fe4a006d6981bd1eda57
URL https://robots.thoughtbot.com/paperclip-security-release