Fix GH-22060 and GH-22122: pin object/closure in callback dispatch#73
Closed
iliaal wants to merge 1 commit into
Closed
Fix GH-22060 and GH-22122: pin object/closure in callback dispatch#73iliaal wants to merge 1 commit into
iliaal wants to merge 1 commit into
Conversation
iliaal
force-pushed
the
fix/gh-22060-22122-uaf-pin-fcc-object
branch
from
01cb8aa to
d6ac8ec
Compare
Pin object and closure across zend_call_known_fcc and spl_perform_autoload so a callback that releases the borrowed FCC (autoloader self-unregister, SQLite3 setAuthorizer(null)) doesn't free $this mid-call. Initialize fcc.closure in ReflectionFunction::invoke/invokeArgs since the pin reads it. Fixes phpGH-22060 Fixes phpGH-22122
iliaal
force-pushed
the
fix/gh-22060-22122-uaf-pin-fcc-object
branch
from
d6ac8ec to
02a264f
Compare
Owner
Author
|
Superseded by upstream php#22151. |
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Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be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.
phpGH-22060 + phpGH-22122 fix for PHP-8.4. Same UAF in two callback-dispatch sites: zend_call_known_fcc and spl_perform_autoload forward the borrowed object/closure into the call frame without addref. 8.4 and 8.5 both need the pair, since SPL autoload still uses zend_call_known_function direct. Master only needs the zend_API change because Zend/zend_autoload.c routes through zend_call_known_fcc.