Description
In PHP versions 7.2.x below 7.2.34, 7.3.x below 7.3.23 and 7.4.x below 7.4.11, when AES-CCM mode is used with openssl_encrypt() function with 12 bytes IV, only first 7 bytes of the IV is actually used. This can lead to both decreased security and incorrect encryption data.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| PHP Group | PHP | 7.3.x – < 7.3.23, 7.4.x – < 7.4.11, 7.2.x – < 7.2.34 | 7.3.23 |
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 11 | php7.4 | 7.4.11-1 | — |
| Debian 10 | php7.3 | 7.3.27-1~deb10u1 | DSA-4856-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | php7.4 | 7.4.3-4ubuntu2.4 | USN-4583-1 |
| Ubuntu 18.04 LTS | php7.2 | 7.2.24-0ubuntu0.18.04.7 | USN-4583-1 |
| Ubuntu 16.04 LTS | php7.0 | 7.0.33-0ubuntu0.16.04.16 | USN-4583-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | php5 | 5.5.9+dfsg-1ubuntu4.29+esm13 | USN-4583-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | apcu-panel +2 | 5.1.18-1.module+el8.3.0+6678+b09f589e | RHSA-2021:4213 |
| RHEL 8 | libzip +2 | 1.6.1-1.module+el8.3.0+6678+b09f589e | RHSA-2021:4213 |
| RHEL 8 | php +25 | 7.4.19-1.module+el8.5.0+11143+cc873159 | RHSA-2021:4213 |
| RHEL 8 | php-pear | 1:1.10.12-1.module+el8.3.0+6678+b09f589e | RHSA-2021:4213 |
| RHEL 8 | php-pecl-rrd | 2.0.1-1.module+el8.3.0+6678+b09f589e | RHSA-2021:4213 |
| RHEL 8 | php-pecl-xdebug | 2.9.5-1.module+el8.3.0+6678+b09f589e | RHSA-2021:4213 |
| RHEL 8 | php-pecl-zip | 1.18.2-1.module+el8.3.0+6678+b09f589e | RHSA-2021:4213 |
| RHEL 3 | rh-php73-php +27 | 7.3.29-1.el7 | RHSA-2021:2992 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | apcu-panel +2 | 5.1.18-1.module_el8.6.0+2750+78feabcb | ALSA-2021:4213 |
| AlmaLinux 8 | libzip +2 | 1.6.1-1.module_el8.6.0+2750+78feabcb | ALSA-2021:4213 |
| AlmaLinux 8 | php +25 | 7.4.19-3.module_el8.6.0+2976+8b9a0d08 | ALSA-2021:4213 |
| AlmaLinux 8 | php-pear | 1:1.10.12-1.module_el8.6.0+2750+78feabcb | ALSA-2021:4213 |
| AlmaLinux 8 | php-pecl-rrd | 2.0.1-1.module_el8.3.0+2009+b272fdef | ALSA-2021:4213 |
| AlmaLinux 8 | php-pecl-xdebug | 2.9.5-1.module_el8.6.0+2750+78feabcb | ALSA-2021:4213 |
| AlmaLinux 8 | php-pecl-zip | 1.18.2-1.module_el8.6.0+2750+78feabcb | ALSA-2021:4213 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | libzip | 1.6.1-1.module+el8.4.0+415+e936cba3 | RLSA-2021:4213 |
| Rocky Linux 8 | php | 7.4.19-1.module+el8.5.0+696+61e7c9ba | RLSA-2021:4213 |
| Rocky Linux 8 | php-pear | 1:1.10.12-1.module+el8.4.0+415+e936cba3 | RLSA-2021:4213 |
| Rocky Linux 8 | php-pecl-apcu | 5.1.18-1.module+el8.4.0+415+e936cba3 | RLSA-2021:4213 |
| Rocky Linux 8 | php-pecl-rrd | 2.0.1-1.module+el8.4.0+414+2e7afcdd | RLSA-2021:4213 |
| Rocky Linux 8 | php-pecl-xdebug | 2.9.5-1.module+el8.4.0+415+e936cba3 | RLSA-2021:4213 |
| Rocky Linux 8 | php-pecl-zip | 1.18.2-1.module+el8.4.0+415+e936cba3 | RLSA-2021:4213 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | php7 | 7.4.33-150200.3.46.2 | SUSE-SU-2022:4069-1 |
| SLES 15 SP2 | php7 | 7.4.6-3.11.1 | SUSE-SU-2022:4069-1, SUSE-SU-2020:2941-1 |
| SLES 15 SP1 | php7 | 7.2.5-4.67.2 | SUSE-SU-2022:4067-1, SUSE-SU-2020:2997-1 |
| SLES 15 | php7 | 7.2.5-4.67.2 | SUSE-SU-2022:4067-1, SUSE-SU-2020:2997-1 |
| SLES 12 SP5 | php72 | 7.2.5-1.54.1 | SUSE-SU-2020:2943-1 |
| SLES 12 SP5 | php74 | 7.4.6-1.13.1 | SUSE-SU-2022:4068-1, SUSE-SU-2020:2896-1 |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 | php72 | 7.2.5-1.54.1 | SUSE-SU-2020:2943-1 |
| SLES 12 | php74 | 7.4.6-1.13.1 | SUSE-SU-2022:4068-1, SUSE-SU-2020:2896-1 |
| SLES for SAP 15 SP2 | php7 | 7.4.33-150200.3.46.2 | SUSE-SU-2022:4069-1 |
| SLES for SAP 15 SP1 | php7 | 7.2.34-150000.4.103.1 | SUSE-SU-2022:4067-1 |
| SLES for SAP 15 | php7 | 7.2.5-4.67.2 | SUSE-SU-2022:4067-1, SUSE-SU-2020:2997-1 |
| SLE HPC 15 SP2 | php7 | 7.4.33-150200.3.46.2 | SUSE-SU-2022:4069-1 |
| SLE HPC 15 SP1 | php7 | 7.2.34-150000.4.103.1 | SUSE-SU-2022:4067-1 |
| SLE HPC 15 | php7 | 7.2.5-4.67.2 | SUSE-SU-2022:4067-1, SUSE-SU-2020:2997-1 |
| SUSE Manager Server 4.1 | php7 | 7.4.33-150200.3.46.2 | SUSE-SU-2022:4069-1 |
| SUSE Manager Retail Branch Server 4.1 | php7 | 7.4.33-150200.3.46.2 | SUSE-SU-2022:4069-1 |
| SUSE Manager Proxy 4.1 | php7 | 7.4.33-150200.3.46.2 | SUSE-SU-2022:4069-1 |
| SUSE Enterprise Storage 7 | php7 | 7.4.33-150200.3.46.2 | SUSE-SU-2022:4069-1 |
| SUSE Enterprise Storage 6 | php7 | 7.2.34-150000.4.103.1 | SUSE-SU-2022:4067-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.4 | php7 | 7.2.34-150000.4.103.1 | SUSE-SU-2022:4069-1, SUSE-SU-2022:4067-1 |
| openSUSE Leap 15.3 | php7 +1 | 7.4.33-150200.3.46.2 | SUSE-SU-2022:4069-1 |
| openSUSE Leap 15.2 | php7 +1 | 7.4.6-lp152.2.9.1 | openSUSE-SU-2020:1703-1 |
| openSUSE Leap 15.1 | php7 +1 | 7.2.5-lp151.6.36.7 | openSUSE-SU-2020:1767-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.15 | php7 | 7.4.11-r0 | — |
| Alpine v3.14 | php7 | 7.4.11-r0 | — |
| Alpine v3.13 | php7 | 7.4.11-r0 | — |
| Alpine v3.12 | php7 | 7.3.23-r0 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | apcu-panel +2 | 5.1.18-1.module+el8.3.0+7685+72d70b58 | ELSA-2021-4213 |
| Oracle Linux 8 | libzip +2 | 1.6.1-1.module+el8.3.0+7685+72d70b58 | ELSA-2021-4213 |
| Oracle Linux 8 | php +25 | 7.4.19-1.module+el8.5.0+20354+db97279a | ELSA-2021-4213 |
| Oracle Linux 8 | php-pear | 1:1.10.12-1.module+el8.3.0+7685+72d70b58 | ELSA-2021-4213 |
| Oracle Linux 8 | php-pecl-rrd | 2.0.1-1.module+el8.3.0+7685+72d70b58 | ELSA-2021-4213 |
| Oracle Linux 8 | php-pecl-xdebug | 2.9.5-1.module+el8.3.0+7685+72d70b58 | ELSA-2021-4213 |
| Oracle Linux 8 | php-pecl-zip | 1.18.2-1.module+el8.3.0+7685+72d70b58 | ELSA-2021-4213 |
Advisories 19
- ALSA-2021:4213 Moderate: php:7.4 security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2021:4213 Red Hat Security Advisory: php:7.4 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2021:2992 Red Hat Security Advisory: rh-php73-php security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-4583-1 php5, php7.0, php7.2, php7.4 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4856-1 php7.3 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2021:4213 Moderate: php:7.4 security, bug fix, and enhancement update Rocky Linux Security Advisories · Feb 5, 2026
- SUSE-SU-2020:2943-1 Security update for php72 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:4067-1 Security update for php7 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2941-1 Security update for php7 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2997-1 Security update for php7 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1767-1 Security update for php7 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2896-1 Security update for php74 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1703-1 Security update for php7 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:4068-1 Security update for php74 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:4069-1 Security update for php7 SUSE / openSUSE Security Updates · Feb 4, 2026
- FSA-202302 Festo: Several vulnerabilities in FactoryViews CERT@VDE · Feb 2, 2026
- ICSA-26-027-02 Festo Didactic SE MES PC CISA ICS & IT advisories · Jan 27, 2026
- FSA-202402 Several Vulnerabilities in MES PC (Windows 10) CERT@VDE · Dec 8, 2025
- ELSA-2021-4213 Moderate: php:7.4 security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 16, 2021
References
- https://bugs.php.net/bug.php?id=79601
- FEDORA-2020-4573f0e03a vendor-advisory
- FEDORA-2020-4fe6b116e5 vendor-advisory
- FEDORA-2020-94763cb98b vendor-advisory
- openSUSE-SU-2020:1703 vendor-advisory
- USN-4583-1 vendor-advisory
- openSUSE-SU-2020:1767 vendor-advisory
- GLSA-202012-16 vendor-advisory
- DSA-4856 vendor-advisory
- https://www.oracle.com/security-alerts/cpuApr2021.html
- https://security.netapp.com/advisory/ntap-20201016-0001/
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://www.tenable.com/security/tns-2021-14