Vigil@nce - LibTIFF: out-of-bounds memory reading via TIFFReadRawStrip1
September 2016 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/offer
SYNTHESIS OF THE VULNERABILITY
An attacker can force a read at an invalid address via
TIFFReadRawStrip1() of LibTIFF, in order to trigger a denial of
service, or to obtain sensitive information.
Impacted products: Debian, LibTIFF.
Severity: 2/4.
Creation date: 13/07/2016.
DESCRIPTION OF THE VULNERABILITY
The LibTIFF library analyzes images in TIFF format.
However, the TIFFReadRawStrip1() and TIFFReadRawTile1() function
try to read a memory area located outside the expected range,
which triggers a fatal error, or leads to the disclosure of a
memory fragment.
An attacker can therefore force a read at an invalid address via
TIFFReadRawStrip1() of LibTIFF, in order to trigger a denial of
service, or to obtain sensitive information.
ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN
https://vigilance.fr/vulnerability/LibTIFF-out-of-bounds-memory-reading-via-TIFFReadRawStrip1-20090