Language: C
Label: vulnerable
CWE: CWE-74 \u2014 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.

Code:
R_API size_t r_str_ansi_strip(char *str) {
	size_t i = 0;
	while (str[i]) {
		size_t chlen = __str_ansi_length (str + i);
		if (chlen > 1) {
			r_str_cpy (str + i + 1, str + i + chlen);
		}
		i++;
	}
	return i;
}