Buffer overflow

flex.skl in Will Estes and John Millaway Fast Lexical Analyzer Generator flex before 2.5.33 does not allocate enough memory for grammars containing 1 REJECT statements or 2 trailing context rules, which causes flex to generate code that contains a buffer overflow that might allow context-dependen...

DSA-1020-1 flex - buffer overflow

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flex: Potential insecure code generation

Background flex is a programming tool used to generate scanners programs which recognize lexical patterns in text. Description Chris Moore discovered a buffer overflow in a special class of lexicographical scanners generated by flex. Only scanners generated by grammars which use either REJECT, or...