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
| Author | Note |
|---|---|
| mdeslaur | php uses the system libgd2 |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
libgd2 Launchpad, Ubuntu, Debian |
trusty |
Released
(2.1.0-3ubuntu0.7)
|
| upstream |
Needed
|
|
| 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 |
trusty |
Not vulnerable
(uses system gd)
|
| upstream |
Released
(5.6.31)
|
|
| xenial |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
php7.0 Launchpad, Ubuntu, Debian |
trusty |
Does not exist
|
| upstream |
Released
(7.0.21)
|
|
| xenial |
Not vulnerable
(uses system gd)
|
|
| zesty |
Not vulnerable
(uses system gd)
|
|
|
php7.1 Launchpad, Ubuntu, Debian |
trusty |
Does not exist
|
| upstream |
Released
(7.1.7)
|
|
| xenial |
Does not exist
|
|
| zesty |
Does not exist
|
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 6.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | Required |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | None |
| Availability impact | None |
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |