Apache Httpd < 2.2.34: ap_find_token() Buffer Overread

ID HTTPD:81E88D5FDE6AE6835C79ABD53FF87831
Type httpd
Reporter We would like to thank Javier Jiménez (javijmor@gmail.com) for reporting this issue.
Modified 2017-07-11T00:00:00


The HTTP strict parsing changes added in 2.2.32 and 2.4.24 introduced a bug in token list parsing, which allows ap_find_token() to search past the end of its input string. By maliciously crafting a sequence of request headers, an attacker may be able to cause a segmentation fault, or to force ap_find_token() to return an incorrect value.