Rails -- multiple vulnerabilities

Ruby on Rails blog: Hi everyone! Rails 5.2.4.3 and 6.0.3.1 have been released! These releases contain important security fixes, so please upgrade when you can. Both releases contain the following fixes: CVE-2020-8162: Circumvention of file size limits in ActiveStorage CVE-2020-8164: Possible Stro...

Potentially unintended unmarshalling of user-provided objects in MemCacheStore and RedisCacheStore

There is potentially unexpected behaviour in the MemCacheStore and RedisCacheStore where, when untrusted user input is written to the cache store using the raw: true parameter, re-reading the result from the cache can evaluate the user input as a Marshalled object instead of plain text. Vulnerabl...

Ruby on Rails: Untrusted strings that are cache fetched with raw option are automatically marshal loaded

This vulnerability effects application code that caches a string from an untrusted source using the raw: true option. For example, vulnerable application code might looks something like the following ruby body = Rails.cache.fetchkey, raw: true, expiresin: ttl do res = Net::HTTP.getresponseremoteu...