Jump to content

Hacker Technology

A group blog by Leader in Hacker Website - Providing Professional Ethical Hacking Services

  • Entries

    16114

  • Comments

    7952

  • Views

    863543082

Contributors to this blog

  • HireHackking 16114

About this blog

Hacking techniques include penetration testing, network security, reverse cracking, malware analysis, vulnerability exploitation, encryption cracking, social engineering, etc., used to identify and fix security flaws in systems.

HireHackking 
Source: https://code.google.com/p/google-security-research/issues/detail?id=398&can=1&q=label%3AProduct-Flash%20modified-after%3A2015%2F8%2F17&sort=id

The attached sample, signal_sigsegv_7ffff603deef_1525_268381c02bc3b05c84578ebaeafc02f0.swf, typically crashes in this way on my Linux x64 build (Flash v17.0.0.188):

=> 0x00007f693155bf58:	mov    (%rdi),%rbx
rdi            0x23c	572

At first glance this might appear to be a NULL dereference but sometimes it crashes trying to access 0xc8 and different builds have shown crashes at much wilder addresses, so there is probably a use-after-free or other non-deterministic condition going on. For example, our fuzzing cluster saw a crash at 0x400000001.

The base sample from which the fuzz case is derived is also attached.

Proof of Concept:
https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/37868.zip