PHP 5.5.37 php_url_parse_ex() buffer overflow read

2016.07.24

Credit: yohgaki

Risk: Medium

Local: Yes

Remote: No

CVE: N/A

CWE: N/A

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) {

References:

https://bugs.php.net/bug.php?id=70480

See this note in RAW Version

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PHP 5.5.37 php_url_parse_ex() buffer overflow read

References:

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