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PHP 5.5.37 php_url_parse_ex buffer overflow read

Posted on 30 November -0001

<HTML><HEAD><TITLE>PHP 5.5.37 php_url_parse_ex() buffer overflow read</TITLE><META http-equiv="Content-Type" content="text/html; charset=utf-8"></HEAD><BODY>php_url_prase_ex() read buffer exceeding its limits and segfaults.
PHP function parse_url() is not affected since PHP string is terminated by null char always.

Patch to fix this:

@@ -319,8 +320,9 @@ PHPAPI php_url *php_url_parse_ex(char const *str, size_t length)
 
        nohost:
 
        if ((p = memchr(s, '?', (ue - s)))) {
-               pp = strchr(s, '#');
+               pp = memchr(s, '#', (ue - s));
 
                if (pp && pp < p) {
                        if (pp - s) {

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