Gnome Nautilus 3.16 – Denial of Service

• Exploit Database
• 11 阅读

• 作者： Panagiotis Vagenas
  日期： 2015-12-03
• 类别：

  • dos
  平台：

  • linux
• 来源：https://www.exploit-db.com/exploits/38857/

• * Exploit Title: Gnome Nautilus [Denial of Service]
  * Discovery Date: 2015/10/27
  * Public Disclosure Date: 2015/12/01
  * Exploit Author: Panagiotis Vagenas
  * Contact: https://twitter.com/panVagenas
  * Vendor Homepage: https://www.gnome.org/
  * Software Link: https://wiki.gnome.org/Apps/Nautilus
  * Version: 3.16
  * Tested on: Ubuntu 14.04, Fedora 22
  
  
  Description
  ========================================================================
  ========
  
  Gnome Nautilus <= v3.16 is vulnerable to DoS attack through a
  malicious crafted file.
  
  Details
  - ------------------------------------------------------------------------
  - --------
  A malicious crafted file can be used to perform a DoS attack in
  Nautilus. The attacker must have local
  access to affected system or convince the victim to download the file
  (email, web url etc.). Next time
  the victim tries to open the directory that contains the malicious
  file, Nautilus crashes without warning.
  
  The file must have a `.jp2` extension and start with the JPEG
  signature (`0xFFD8`).
  
  Additional Notes
  - ------------------------------------------------------------------------
  - --------
  
  This seems to happen every time Nautilus is trying to update the
  thumbnail of the file.
  
  In Ubuntu and Fedora process dies with the message:
  ```
  Premature end of JPEG file
  JPEG datastream contains no image
  ```
  
  This vulnerability seems to affect all Nautilus versions prior to 3.16.
  
  PoC
  ========================================================================
  ========
  
  1. Create a file without a `.jp2` extension in an affected system
  2. Open the file in a hex editor so it start with the JPEG signature
  (`0xFFD8`)
  3. Rename the file so it has the `.jp2` extension
  4. Open directory with Nautilus
  5. Nautilus dies without warning
  
  Timeline
  ========================================================================
  ========
  
  2015/10/27 - Discovered
  2015/10/29 - Vendor notified at security@gnome.org
  
  Solution
  ========================================================================
  ========
  
  No official solution yet exists.
  
  Work-around
  - ------------------------------------------------------------------------
  - --------
  
  Disabling generation of thumbnails for all files, through Nautilus
  options, will prevent Nautilus from crashing.