Add support for allowed_classes optional parameter to unserialize#1
Open
wunused wants to merge 5 commits intoWSP-LAB:mainfrom
Open
Add support for allowed_classes optional parameter to unserialize#1wunused wants to merge 5 commits intoWSP-LAB:mainfrom
allowed_classes optional parameter to unserialize#1wunused wants to merge 5 commits intoWSP-LAB:mainfrom
Conversation
This reverts commit 8047a04.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
The PHP
unserializefunction can take an optional parameterallowed_classesto restrict the set of allowed classes that can be deserialized (https://www.php.net/manual/en/function.unserialize.php). When an application has a restricted set of allowed classes at an unserialize call site, an exploit can only use gadgets from the set of allowed classes.We extended FUGIO to support the semantics of the
allowed_classesoptional parameter.This was necessary to evaluate our mitigation for deserialization vulnerabilities that automatically determines a correct set of
allowed_classes, and we hope that it can benefit other researchers in the future.