PT-2012-16: Buffer Overflow in Pillow library
Vulnerable software
Pillow library
Version: 1.7.8 and earlier
Link:
https://github.com/python-imaging/Pillow
Severity level
Severity level: Medium
Impact: Buffer Overflow
Access Vector: Remote
CVSS v2:
Base Score: 4.3
Vector: (AV:N/AC:M/Au:N/C:N/I:N/A:P)
CVE: not assigned
Software description
Pillow is an open source Python library that is developed to handle images.
Vulnerability description
The specialists of the Positive Research center have detected a Buffer Overflow vulnerability in Pillow library.
Vulnerablity in libImaging/Storage.c file
Vulnerable code:
im->mode is an array of 5 bytes. If an attacker manages to load an image with YCbCr color space, it cause off-by-one error because of terminated NULL-byte.
Example of a vulnerable code:
How to fix
Update your software up to the latest version
Advisory status
25.06.2012 - Vendor gets vulnerability details
18.07.2012 - Vulnerability details were sent to CERT
15.03.2013 - Vendor releases fixed version and details
10.10.2013 - Public disclosure
Credits
The vulnerability was detected by Pavel Toporkov, Positive Research Center (Positive Technologies Company)
References
http://en.securitylab.ru/lab/PT-2012-16
Reports on the vulnerabilities previously discovered by Positive Research:
http://www.ptsecurity.com/research/advisory/
http://en.securitylab.ru/lab/