Exploit the possiblities

Samsung Android JACK ASLR Bypass

Samsung Android JACK ASLR Bypass
Posted Jul 6, 2016
Authored by Google Security Research, Mark Brand

The usermode audio subsystem for the "Samsung Android Professional Audio" is based on JACK, which appears to be designed for single-user usage. The common JACK configuration on Linux systems appears to be a JACK server running under the current user account, and interacting with JACK clients from the same user account; so with a minimal privilege difference; this is not the case with the configuration on Android, where the JACK service runs as a more privileged user in a less restrictive SELinux domain to the clients that can connect to it. The JACK shared memory implementation uses the struct jack_shm_info_t defined in /common/shm.h to do some bookkeeping. This struct is stored at the start of every JackShmAble object. This means that whenever the JACK server creates an object backed by shared memory, it also stores a pointer to that object (in the address space of the JACK server), allowing a malicious client to bypass ASLR in the JACK server process.

tags | advisory
systems | linux
MD5 | 8288db414362e6a728044ca93ad526bf

Comments

RSS Feed Subscribe to this comment feed

No comments yet, be the first!

Login or Register to post a comment

File Archive:

December 2017

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Dec 1st
    15 Files
  • 2
    Dec 2nd
    2 Files
  • 3
    Dec 3rd
    1 Files
  • 4
    Dec 4th
    15 Files
  • 5
    Dec 5th
    15 Files
  • 6
    Dec 6th
    18 Files
  • 7
    Dec 7th
    17 Files
  • 8
    Dec 8th
    15 Files
  • 9
    Dec 9th
    13 Files
  • 10
    Dec 10th
    4 Files
  • 11
    Dec 11th
    41 Files
  • 12
    Dec 12th
    44 Files
  • 13
    Dec 13th
    25 Files
  • 14
    Dec 14th
    10 Files
  • 15
    Dec 15th
    0 Files
  • 16
    Dec 16th
    0 Files
  • 17
    Dec 17th
    0 Files
  • 18
    Dec 18th
    0 Files
  • 19
    Dec 19th
    0 Files
  • 20
    Dec 20th
    0 Files
  • 21
    Dec 21st
    0 Files
  • 22
    Dec 22nd
    0 Files
  • 23
    Dec 23rd
    0 Files
  • 24
    Dec 24th
    0 Files
  • 25
    Dec 25th
    0 Files
  • 26
    Dec 26th
    0 Files
  • 27
    Dec 27th
    0 Files
  • 28
    Dec 28th
    0 Files
  • 29
    Dec 29th
    0 Files
  • 30
    Dec 30th
    0 Files
  • 31
    Dec 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2016 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close