[PATCH v6] Improve DST handling (Bug 23102, Bug 21942, Bug 18018, Bug, 23259, CVE-2011-0536 ).

[Andreas Schwab]

On Jun 12 2018, Carlos O'Donell <carlos@redhat.com> wrote:

> +  /* Check for matching name, following closing curly brace (if
> +     required), or trailing characters which are part of an
> +     identifier.  */
> +  size_t rlen = strlen (ref);
> +  if (strncmp (input, ref, rlen) != 0
> +      || (is_curly && input[rlen] != '}')
> +      || ((input[rlen] >= 'A' && input[rlen] <= 'Z')
> +	  || (input[rlen] >= 'a' && input[rlen] <= 'z')
> +	  || (input[rlen] >= '0' && input[rlen] <= '9')
> +	  || (input[rlen] == '_')))

That will always reject ${FOO}.  If is_curly is true, the other checks
must not be performed.

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
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