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Debian: CVE-2017-7890: libgd2, php7.0 -- security update

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Debian: CVE-2017-7890: libgd2, php7.0 -- security update

Severity
4
CVSS
(AV:N/AC:M/Au:N/C:P/I:N/A:N)
Published
08/02/2017
Created
07/25/2018
Added
08/13/2017
Modified
08/07/2020

Description

The GIF decoding function gdImageCreateFromGifCtx in gd_gif_in.c in the GD Graphics Library (aka libgd), as used in PHP before 5.6.31 and 7.x before 7.1.7, does not zero colorMap arrays before use. A specially crafted GIF image could use the uninitialized tables to read ~700 bytes from the top of the stack, potentially disclosing sensitive information.

Solution(s)

  • debian-upgrade-libgd2
  • debian-upgrade-php7-0

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