[ Python ] Fix timing attack in verify_finished()
Open-source bounty · GitHub (bounty labels) · open as of 17 Oct 2026
- Amount as listed
- $1 fixed “$1” — quoted from GitHub (bounty labels)
- Platform
- GitHub (bounty labels)
- Kind of work
- Open-source bounty · Engineering
- Open to
- not stated by the platform
- Deadline
- not stated by the platform
- Status
- Open
- Checked
- 17 Oct 2026, 18:22 UTC
What the listing says
- verify finished() on line 237 compares computed verify to received verify using ==, which short-circuits on the first differing byte and leaks timing information exploitable for MAC forgery - Example: comparing b"^A^B^C" == b"^A^B�" returns False faster than b"^A^B^C" == b"^A^B^C" returns True Acceptance Criteria - v
Excerpt we recorded when we checked: Etiketten: 💎 Bounty, bug, good first issue, help wanted, 💎 Bounty, $1, AI Agent friendly, AI only allowed - no humans
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