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. Vulnerable code looks like:
data = cache.fetch("demo", raw: true) { untrusted_string }
Versions Affected: rails < 5.2.5, rails < 6.0.4
Not affected: Applications not using MemCacheStore or RedisCacheStore. Applications that do not use the raw option when storing untrusted user input.
Fixed Versions: rails >= 5.2.4.3, rails >= 6.0.3.1
Impact
Unmarshalling of untrusted user input can have impact up to and including RCE. At a minimum,
this vulnerability allows an attacker to inject untrusted Ruby objects into a web application.
In addition to upgrading to the latest versions of Rails, developers should ensure that whenever
they are calling Rails.cache.fetch they are using consistent values of the raw parameter for both
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. Vulnerable code looks like:
data = cache.fetch("demo", raw: true) { untrusted_string }
Versions Affected: rails < 5.2.5, rails < 6.0.4
Not affected: Applications not using MemCacheStore or RedisCacheStore. Applications that do not use the raw option when storing untrusted user input.
Fixed Versions: rails >= 5.2.4.3, rails >= 6.0.3.1
Impact
Unmarshalling of untrusted user input can have impact up to and including RCE. At a minimum,
this vulnerability allows an attacker to inject untrusted Ruby objects into a web application.
In addition to upgrading to the latest versions of Rails, developers should ensure that whenever
they are calling Rails.cache.fetch they are using consistent values of the raw parameter for both
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Bumps activesupport from 4.2.10 to 6.1.3.2. This update includes security fixes.
Vulnerabilities fixed
Sourced from The Ruby Advisory Database.
... (truncated)
Sourced from The Ruby Advisory Database.
... (truncated)
Release notes
Sourced from activesupport's releases.
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Changelog
Sourced from activesupport's changelog.
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Commits
75ac626
Preparing for 6.1.3.2 release9c21201
Prep for release85c6823
v6.1.3.15aaaa16
Preparing for 6.1.3 releaseeddb809
Merge pull request #41441 from jonathanhefner/apidocs-inline-code-markup130c128
Preparing for 6.1.2.1 releasebf8c59c
Preparing for 6.1.2 releaseca798c0
Merge pull request #41381 from movermeyer/allow_for_nil_addresses_from_dalli_...97a0a94
Fix warning with Ruby 2.7 on Time.at with keyword arguments5400804
Merge pull request #41376 from fatkodima/memcached-normalize_key-nilDependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting
@dependabot rebase
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