> For the complete documentation index, see [llms.txt](https://kongxin.gitbook.io/dedecms-5-7-bug/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://kongxin.gitbook.io/dedecms-5-7-bug/master.md).

# DedeCMS\_5.7\_Bug

DedeCMS 5.7 Bug

> \[Suggested description] DedeCMS 5.7 allows remote attackers to discover the full path via a direct request for include/downmix.inc.php or inc/inc\_archives\_functions.php.
>
> \[Additional Information]\
> Fix suggestions:\
> Modify the application source code to avoid information leakage.
>
> The vulnerability was discovered by downloading the program's source code to local and online deployment tests.
>
> Location: include/downmix.inc.php
>
> Code:
>
> helper('downmix');
>
> Rows:13
>
> Return error :
>
> Fatal error: Call to undefined function helper() in /www/include/downmix.inc.php on line 13
>
> Harm:
>
> Web site physical path leakage .
>
> conditions for execution:
>
> Normal access can
>
> Edition:
>
> DedeCMS 5.7
>
> Cause the cause :
>
> Call to undefined function helper(), cause path leakage
>
> POC : <http://127.0.0.1/include/downmix.inc.php>
>
> Location: /dede/inc/inc\_archives\_functions.php
>
> Code:
>
> require\_once(DEDEINC.'/dedehttpdown.class.php');
>
> Rows:11
>
> Return error :
>
> Notice: Use of undefined constant DEDEINC - assumed 'DEDEINC' in /www/dede/inc/inc\_archives\_functions.php on line 11\
> Warning: require\_once(DEDEINC/dedehttpdown.class.php): failed to open stream: No such file or directory in /www/dede/inc/inc\_archives\_functions.php on line 11\
> Fatal error: require\_once(): Failed opening required 'DEDEINC/dedehttpdown.class.php' (include\_path='.;C:\php\pear') in /www/dede/inc/inc\_archives\_functions.php on line 11
>
> Harm:
>
> Web site physical path leakage .
>
> conditions for execution:
>
> Normal access can
>
> Edition:
>
> DedeCMS 5.7
>
> Cause the cause :
>
> require\_once(): Failed opening required 'DEDEINC/dedehttpdown.class.php' (include\_path='.;C:\php\pear') , cause path leakage
>
> POC : <http://127.0.0.1/dede/inc/inc_archives_functions.php>
>
> \[VulnerabilityType Other]\
> Physical path leaks
>
> \[Vendor of Product]\
> dedecms
>
> \[Affected Product Code Base]\
> dedecms - 5.7
>
> \[Affected Component]\
> downmix.inc.php , Call to undefined function helper() , Web site physical path leakage
>
> \[Attack Type]\
> Remote
>
> \[Impact Information Disclosure]\
> true
>
> \[Attack Vectors]\
> The vulnerability can be triggered by visiting the URL below:\
> <http://127.0.0.1/include/downmix.inc.php>\
> <http://127.0.0.1/dede/inc/inc_archives_functions.php>
>
> \[Discoverer]\
> kongxin


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