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FreeBSD: VID-5033E2FC-98EC-4EF5-8E0B-87CFBBC73081 (CVE-2017-7890): php-gd and gd -- Buffer over-read into uninitialized memory

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FreeBSD: VID-5033E2FC-98EC-4EF5-8E0B-87CFBBC73081 (CVE-2017-7890): php-gd and gd -- Buffer over-read into uninitialized memory

Severity
4
CVSS
(AV:N/AC:M/Au:N/C:P/I:N/A:N)
Published
08/02/2017
Created
07/25/2018
Added
09/26/2017
Modified
05/07/2019

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)

  • freebsd-upgrade-package-libgd
  • freebsd-upgrade-package-php70-gd
  • freebsd-upgrade-package-php71-gd

References

  • DSA-3938
  • CVE-2017-7890
  • USN-3389-1
  • USN-3389-2

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