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CVE-2017-7890

Published: 2 August 2017

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.

Notes

AuthorNote
mdeslaur
php uses the system libgd2

Priority

Medium

CVSS 3 base score: 6.5

Status

Package Release Status
libgd2
Launchpad, Ubuntu, Debian
upstream Needed

precise
Released (2.0.36~rc1~dfsg-6ubuntu2.5)
trusty
Released (2.1.0-3ubuntu0.7)
xenial
Released (2.1.1-4ubuntu0.16.04.7)
zesty
Released (2.2.4-2ubuntu0.2)
Patches:
other: http://git.php.net/?p=php-src.git;a=commit;h=8dc4f4dc9e44d1cbfe4654aa6e0dc27c94913938
other: https://github.com/libgd/libgd/commit/c613bc169802bb4b639ee2e15c61b25b80a88424
php5
Launchpad, Ubuntu, Debian
upstream
Released (5.6.31)
precise Not vulnerable
(uses system gd)
trusty Not vulnerable
(uses system gd)
xenial Does not exist

zesty Does not exist

php7.0
Launchpad, Ubuntu, Debian
upstream
Released (7.0.21)
precise Does not exist

trusty Does not exist

xenial Not vulnerable
(uses system gd)
zesty Not vulnerable
(uses system gd)
php7.1
Launchpad, Ubuntu, Debian
upstream
Released (7.1.7)
precise Does not exist

trusty Does not exist

xenial Does not exist

zesty Does not exist