Bound the number of compression pointers per name - #155
Merged
Merged
Conversation
Commit 4c2f71b (CVE-2025-24294) capped a decompressed name at 255 octets, bounding its length but not the work: a chain of compression pointers adds no label octets, so the cap never fires while the decoder follows every pointer, and many records sharing one chain make decoding quadratic. Cap the pointers followed per name at 128. Reported by: whiteshadow_8500 (https://hackerone.com/whiteshadow_8500) Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be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.
Commit 4c2f71b (CVE-2025-24294) capped a decompressed name at 255 octets, bounding its length but not the work: a chain of compression pointers adds no label octets, so the cap never fires while the decoder follows every pointer, and many records sharing one chain make decoding quadratic. Cap the pointers followed per name at 128.
Reported by: whiteshadow_8500 (https://hackerone.com/whiteshadow_8500)