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AUSCERT External Security Bulletin Redistribution
ESB-2021.3598
USN-5125-1: PHP vulnerability
28 October 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: PHP
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Root Compromise -- Existing Account
Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-21703
Reference: ESB-2021.3540
ESB-2021.3537
Original Bulletin:
https://ubuntu.com/security/notices/USN-5125-1
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USN-5125-1: PHP vulnerability
27 October 2021
PHP-PFM in PHP could be made to run program as an administrator
if it received specially crafted input.
Releases
o Ubuntu 21.10
o Ubuntu 21.04
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
o Ubuntu 16.04 ESM
o Ubuntu 14.04 ESM
Packages
o php5 - HTML-embedded scripting language interpreter
o php7.0 - HTML-embedded scripting language interpreter
o php7.2 - HTML-embedded scripting language interpreter
o php7.4 - HTML-embedded scripting language interpreter
o php8.0 - HTML-embedded scripting language interpreter
Details
It was discovered that PHP-FPM in PHP incorrectly handled certain inputs.
An attacker could possibly use this issue to cause a crash or execute
arbitrary code.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 21.10
o php8.0-fpm - 8.0.8-1ubuntu0.1
Ubuntu 21.04
o php7.4-fpm - 7.4.16-1ubuntu2.2
Ubuntu 20.04
o php7.4-fpm - 7.4.3-4ubuntu2.7
Ubuntu 18.04
o php7.2-fpm - 7.2.24-0ubuntu0.18.04.10
Ubuntu 16.04
o php7.0-fpm - 7.0.33-0ubuntu0.16.04.16+esm2
Available with UA Infra or UA Desktop
Ubuntu 14.04
o php5-fpm - 5.5.9+dfsg-1ubuntu4.29+esm15
Available with UA Infra or UA Desktop
In general, a standard system update will make all the necessary changes.
References
o CVE-2021-21703
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