Description
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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 8 | php5 | 5.6.26+dfsg-0+deb8u1 | DSA-3689-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 2 | rh-php56 +2 | 2.3-1.el6 | RHSA-2016:2750 |
| RHEL 2 | rh-php56-php +27 | 5.6.25-1.el6 | RHSA-2016:2750 |
| RHEL 2 | rh-php56-php-pear | 1:1.9.5-4.el6 | RHSA-2016:2750 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | php5 | 5.5.14-73.1 | SUSE-SU-2016:2408-1 |
| SLES 12 SP1 | php7 | 7.0.7-15.1 | SUSE-SU-2016:2460-1 |
| SLES 12 | php5 | 5.5.14-73.1 | SUSE-SU-2016:2408-1 |
| SLES 12 | php7 | 7.0.7-15.1 | SUSE-SU-2016:2460-2, SUSE-SU-2016:2460-1 |
| SLES 11 SP4 | php53 | 5.3.17-84.1 | SUSE-SU-2016:2459-1 |
| SLES 11 SP3 | php53 | 5.3.17-84.1 | SUSE-SU-2016:2459-1 |
| SLES 11 SP2 | php53 | 5.3.17-55.1 | SUSE-SU-2016:2328-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 11 SP4 | php53 | 5.3.17-84.1 | SUSE-SU-2016:2459-1 |
| SUSE OpenStack Cloud 5 | php53 | 5.3.17-84.1 | SUSE-SU-2016:2459-1 |
| SUSE Manager Proxy 2.1 | php53 | 5.3.17-84.1 | SUSE-SU-2016:2459-1 |
| SUSE Manager 2.1 | php53 | 5.3.17-84.1 | SUSE-SU-2016:2459-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | php53 | 5.3.17-84.1 | SUSE-SU-2016:2459-1 |
Advisories 7
- RHSA-2016:2750 Red Hat Security Advisory: rh-php56 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- DSA-3689-1 php5 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2016:2460-1 Security update for php7 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2328-1 Security update for php53 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2408-1 Security update for php5 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2460-2 Security update for php7 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2459-1 Security update for php53 SUSE / openSUSE Security Updates · Feb 4, 2026
References
- http://www.php.net/ChangeLog-7.php
- GLSA-201611-22 vendor-advisory
- 1036680 vdb-entry
- https://github.com/php/php-src/commit/b6f13a5ef9d6280cf984826a5de012a32c396cd4?w=1
- RHSA-2016:2750 vendor-advisory
- 92755 vdb-entry
- http://www.php.net/ChangeLog-5.php
- https://www.tenable.com/security/tns-2016-19
- [oss-security] 20160902 Re: CVE assignment for PHP 5.6.25 and 7.0.10 - and libcurl mailing-list
- https://bugs.php.net/bug.php?id=72697
- https://github.com/php/php-src/commit/28022c9b1fd937436ab67bb3d61f652c108baf96