CVE-2016-7126
Published: 12 September 2016
The imagetruecolortopalette function in ext/gd/gd.c in PHP before 5.6.25 and 7.x before 7.0.10 does not properly validate the number of colors, which allows remote attackers to cause a denial of service (select_colors allocation error and out-of-bounds write) or possibly have unspecified other impact via a large value in the third argument.
Notes
| Author | Note |
|---|---|
| tyhicks |
The PHP bug states that libgd2 is not affected and I've verified this through code review and testing. |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
libgd2
Launchpad, Ubuntu, Debian |
precise |
Not vulnerable
(overflow checks performed)
|
| trusty |
Not vulnerable
(overflow checks performed)
|
|
| upstream |
Not vulnerable
(overflow checks performed)
|
|
| xenial |
Not vulnerable
|
|
|
php5
Launchpad, Ubuntu, Debian |
precise |
Not vulnerable
(uses system gd)
|
| trusty |
Not vulnerable
(uses system gd)
|
|
| upstream |
Needs triage
|
|
| xenial |
Does not exist
|
|
|
php7.0
Launchpad, Ubuntu, Debian |
precise |
Does not exist
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Not vulnerable
(uses system gd)
|
|
|
Patches:
upstream: https://github.com/php/php-src/commit/b6f13a5ef9d6280cf984826a5de012a32c396cd4?w=1 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 9.8 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |