Just because you can upload a file doesn't mean the server will parse it in
a way that would compromise it. That's not how it works. There's a reason
why most of your examples are around exploiting php applications.

On Oct 10, 2017 9:20 AM, "Stealth Mode" <[email protected]> wrote:

> Another set of examples....
>
> https://securelist.com/png-embedded-malicious-payload-
> hidden-in-a-png-file/74297/
>
> https://phocean.net/2013/09/29/file-upload-vulnerabilities-appending-php-
> code-to-an-image.html
>
> http://www.hackingarticles.in/5-ways-file-upload-
> vulnerability-exploitation/
>
> https://www.owasp.org/index.php/Server-Side_Includes_(SSI)_Injection
>
> Really good book on image file injections...
>
> https://books.google.com/books?id=lG_XdxA5LRUC&pg=PA21&;
> lpg=PA21&dq=image+file+injection+compromsing+server&
> source=bl&ots=E_qdLyJY3C&sig=8BSYFi3AukgoccEcujtnrdeoR4Y&
> hl=en&sa=X&ved=0ahUKEwiG58epn-bWAhVi_IMKHcaqD5YQ6AEIWTAH#v=
> onepage&q=image%20file%20injection%20compromsing%20server&f=false
>
> On Tue, Oct 10, 2017 at 5:19 AM, Saint K. <[email protected]>
> wrote:
>
>> Do you have a POC?
>>
>>
>> * From: * Stealth Mode <[email protected]>
>> * To: * <[email protected]>
>> * Sent: * 10/10/2017 12:44 AM
>> * Subject: * Re: [Csgo_servers] Custom files exploit
>>
>> Yes, IT skills. Electronics skills. And old school knowledge of how to
>> inject image files with malicious code (NetSec/ITSec). This is an older
>> style of "hacking". Remember those warnings about clicking download
>> attachments from the 90s onward? Same thing still applies. Except, there is
>> no detection for any hlds/go server, so an injected image can contaminate a
>> server cache. Which in turn will infect clients. Any image file, any data
>> file really, can be modified like this. Willing to bet good money those
>> $500. go weapon skins have hack code scripted and injected into the image.
>>
>>
>> On Mon, Oct 9, 2017 at 11:59 AM, iNilo <[email protected]> wrote:
>>
>> Sure,
>>
>> But you have anything to back this up? (don't take it the wrong way)
>>
>> Nilo.
>>
>> 2017-10-09 16:54 GMT+02:00 Stealth Mode <[email protected]>:
>>
>> Headsup admins/owners. Might want to disable custom files till valve
>> addresses this issue brought to their attention a month ago.
>> There is an exploit where any client with minor skill can inject custom
>> files with all types of malicious code. From hacks in weapon skins, to
>> ransomware in custom .bsp, to remote backdoors in custom spray paints.
>>
>> The exploit is injecting code into any image, sound, or data file. You
>> can take weapon skins (csgo), sound files, spray paint image files, even
>> .bsp/etc. and inject hack code, or actual ransomware, viruses, or
>> Trojans/rootkits directly into a server cache, or client cache via the
>> custom file.
>>
>> Might want to disable custom files till valve decides to correct this
>> issue.
>>
>> -StealthMode
>>
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>
>
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