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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


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