[PROTON-2525] Received link handles greater or equal to 2^31 cause proton-c to misbehave

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: proton-c-0.38.0
• Component/s: proton-c
• Labels: fuzzer
• Assignee: Andrew Stitcher
• Reporter: Andrew Stitcher
• Created: 01/Apr/22 20:38
• Updated: 11/Nov/22 14:37
• Resolved: 01/Apr/22 21:02

Description

Proton-c reserves link handles with the high bit set for its own purposes. But if the peer AMQP implementation sends a handle with the high bit set the attach is not rejected in any way, but we just misbehave!

We can tell the peer that we won't accept handles larger than 0x7ffffff in the begin frame, so that if we receive a handle larger than this we can reject it with an error.