Adobe Flash – Heap Buffer Overflow Due to Indexing Error When Loading FLV File
Source: https://code.google.com/p/google-security-research/issues/detail?id=426&can=1&q=label%3AProduct-Flash%20modified-after%3A2015%2F8%2F17&sort=id To reproduce, host the attached files appropriately, and: http://localhost/LoadMP4.swf?file=crash3006694.flv If there is no crash at first, refresh the page a few times. With a debugger attached to 64-bit Flash in Chrome Linux, the crash manifests like this: => 0x00007f7779846eee: mov %ax,(%rdi,%rdx,2) rax 0xff69 rdi 0x7f7778b70000 rdx 0x160b 7f777861e000-7f7778b72000 rw-p 00000000 00:00 0 7f7778b72000-7f7779228000 ---p 00000000 00:00 0 It looks like an indexing error; the rdi "base" address is in bounds but add on 2*rdx and the address is not in bounds. Proof of Concept: https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/37880.zip |