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Vigil@nce - gimp: use after free in the XCF parser

August 2016 by Vigil@nce

This bulletin was written by Vigil@nce : https://vigilance.fr/offer

SYNTHESIS OF THE VULNERABILITY

An attacker can force the usage of a freed memory area in the XCF
file parser, in order to trigger a denial of service, and possibly
to run code.

Impacted products: Debian, Fedora, openSUSE, openSUSE Leap,
Slackware, Ubuntu.

Severity: 2/4.

Creation date: 27/06/2016.

DESCRIPTION OF THE VULNERABILITY

GIMP is an image processing application.

Its native file format XCF allows to record the multiple layers
that make an image and information about their transparency.
However, some cases of use after free have been identified in the
code that parse XCF files.

An attacker can therefore force the usage of a freed memory area
in the XCF file parser, in order to trigger a denial of service,
and possibly to run code.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

https://vigilance.fr/vulnerability/gimp-use-after-free-in-the-XCF-parser-19972


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