Description
The openssl_random_pseudo_bytes function in ext/openssl/openssl.c in PHP before 5.4.44, 5.5.x before 5.5.28, and 5.6.x before 5.6.12 incorrectly relies on the deprecated RAND_pseudo_bytes function, which makes it easier for remote attackers to defeat cryptographic protection mechanisms via unspecified vectors.
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.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | php5 | 5.5.9+dfsg-1ubuntu4.16 | — |
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 | 5.5.14-56.1 | SUSE-SU-2016:1277-1 |
| SLES 12 | php5 | 5.5.14-56.1 | SUSE-SU-2016:1277-1 |
| SLES 11 SP4 | php53 | 5.3.17-62.1 | SUSE-SU-2016:1581-1, SUSE-SU-2016:1310-1 |
| SLES 11 SP3 | php53 | 5.3.17-71.1 | SUSE-SU-2016:1581-1 |
| SLES 11 SP2 | php53 | 5.3.17-47.1 | SUSE-SU-2016:1638-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 11 SP4 | php53 | 5.3.17-62.1 | SUSE-SU-2016:1581-1, SUSE-SU-2016:1310-1 |
| SUSE OpenStack Cloud 5 | php53 | 5.3.17-71.1 | SUSE-SU-2016:1581-1 |
| SUSE Manager Proxy 2.1 | php53 | 5.3.17-71.1 | SUSE-SU-2016:1581-1 |
| SUSE Manager 2.1 | php53 | 5.3.17-71.1 | SUSE-SU-2016:1581-1 |
Advisories 5
- RHSA-2016:2750 Red Hat Security Advisory: rh-php56 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- SUSE-SU-2016:1638-1 Security update for php53 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:1310-1 Security update for php53 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:1277-1 Security update for php5 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:1581-1 Security update for php53 SUSE / openSUSE Security Updates · May 2, 2025
References
- USN-2952-1 vendor-advisory
- http://www.php.net/ChangeLog-7.php
- https://bugs.launchpad.net/ubuntu/+source/php5/+bug/1534203
- RHSA-2016:2750 vendor-advisory
- http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=16023f3e3b9c06cf677c3c980e8d574e4c162827
- USN-2952-2 vendor-advisory
- https://bugs.php.net/bug.php?id=70014
- http://www.php.net/ChangeLog-5.php
- openSUSE-SU-2016:1274 vendor-advisory
- SUSE-SU-2016:1277 vendor-advisory
- [oss-security] 20160423 Re: CVE request: PHP issues fixed in 7.0.5, 5.6.20 and 5.5.34 releases mailing-list
- openSUSE-SU-2016:1373 vendor-advisory