[Bug 1882180] Re: DoS vulnerability: fail to allocate

[Marc Deslauriers]

https://github.com/sungjungk/whoopsie_killer2

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to whoopsie in Ubuntu.
https://bugs.launchpad.net/bugs/1882180

Title:
  DoS vulnerability: fail to allocate

Status in whoopsie package in Ubuntu:
  Confirmed
Status in whoopsie source package in Xenial:
  Confirmed
Status in whoopsie source package in Bionic:
  Confirmed
Status in whoopsie source package in Eoan:
  Confirmed
Status in whoopsie source package in Focal:
  Confirmed
Status in whoopsie source package in Groovy:
  Confirmed

Bug description:
  Hi,

  I have found a security issue on whoopsie 0.2.69 and earlier.

  # Vulnerability description
  In whoopsie 0.2.69 and earlier, there is a denial of service vulnerability in the parse_report function.
  A crafted input, i.e., crash report located in '/var/crash/', will lead to a denial of service attack.
  During the parsing of the crash report, the data length is not checked.         
  The value of data length can be directly controlled by an input file.           
  In the parse_report() function, the g_malloc or g_realloc is called based on data length.
  If we set the value of data length close to the amount of system memory, it will cause the daemon process to terminate unexpectedly, hang the system, or trigger the OOM killer.

  # PoC
  Please check the below whoopsie_killer2.py

  Sincerely,

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/whoopsie/+bug/1882180/+subscriptions