Re: Increase maximum size of an uploaded file to 50Mbyte
| From: | Yasuo Ohgaki | Date: | Sat, 10 Sep 2022 14:29:51 +0000 |
| Subject: | Re: Increase maximum size of an uploaded file to 50Mbyte | ||
| References: | 1 2 3 4 5 | Groups: | php.internals |
| Request: | Send a blank email to internals+get-118601@lists.php.net to get a copy of this message | ||
2022年9月10日(土) 23:23 David Gebler <davidgebler@gmail.com>:
> On Sat, Sep 10, 2022 at 3:05 PM juan carlos morales <
> dev.juan.morales@gmail.com> wrote:
>
>> I also agree that increasing the size to something bigger than 8M
>> might not be a good idea; I can imagine that a value bigger than 8M
>> (like 50M) will cause an impact in hosting platforms specially, which
>> will be forced to always change the php's default values to a lower
>> one, because of potential DoS Attacks.
>>
>> Default settings should have a reasonable level of security in mind.
>>
>
> Do these settings actually have any impact in respect of DoS attacks? As
> far as I'm aware, neither post_max_size nor upload_max_filesize do anything
> to prevent or terminate processes where the client sends data exceeding
> these limits, that's something you should handle in your webserver.
>
For example, password hash DoS attack was made possible because PHP allows
8MB post data.
https://www.acunetix.com/vulnerabilities/web/long-password-denial-of-service/
IIRC, Drupal has a security release for this.
Regards,
--
Yasuo Ohgaki
yohgaki@ohgaki.net