[KAFKA-10574] Infinite loop in SimpleHeaderConverter and Values classes

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.1.0, 1.1.1, 1.1.2, 2.0.0, 2.0.1, 2.1.0, 2.2.0, 2.1.1, 2.0.2, 2.3.0, 2.2.1, 2.2.2, 2.4.0, 2.3.1, 2.5.0, 2.4.1, 2.6.0, 2.5.1
• Fix Version/s: 2.3.2, 2.4.2, 2.7.0, 2.5.2, 2.6.1
• Component/s: connect
• Assignee: Chris Egerton
• Reporter: Chris Egerton
• Reviewer: Randall Hauch
• Created: 05/Oct/20 16:17
• Updated: 18/May/22 01:32
• Resolved: 12/Oct/20 20:00

Description

A header value with the byte sequence 0xEF, 0xBF, 0xBF will cause an infinite loop in the Values::parseString method. Since that method is invoked by the default header converter (SimpleHeaderConverter), any sink record with that byte array will, by default, cause a sink task reading that record to stall forever.

This occurs because that byte sequence, when parsed as a UTF-8 string and then read by a StringCharacterIterator, causes the CharacterIterator.DONE character to be returned from StringCharacterIterator::current, StringCharacterIterator::next, etc., and a check for that character is used by the Values class for its parsing logic.

Issue Links

• links to: GitHub Pull Request #9375