Exploit/Advisories

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Ubuntu Security Notice USN-6757-2
May 02, 2024

php7.4, php8.1, php8.2 vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 23.10
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

Several security issues were fixed in PHP.

Software Description:
- php8.2: server-side, HTML-embedded scripting language (metapackage)
- php8.1: HTML-embedded scripting language interpreter
- php7.4: HTML-embedded scripting language interpreter

Details:

USN-6757-1 fixed vulnerabilities in PHP. Unfortunately these fixes were incomplete for
Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, and Ubuntu 23.10. This update fixes the problem.

Original advisory details:

It was discovered that PHP incorrectly handled PHP_CLI_SERVER_WORKERS variable.
An attacker could possibly use this issue to cause a crash or execute
arbitrary code. This issue only affected Ubuntu 20.04 LTS, and
Ubuntu 22.04 LTS. (CVE-2022-4900)

It was discovered that PHP incorrectly handled certain cookies.
An attacker could possibly use this issue to cookie by pass.
(CVE-2024-2756)

It was discovered that PHP incorrectly handled some passwords.
An attacker could possibly use this issue to cause an account takeover
attack. (CVE-2024-3096)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 23.10
libapache2-mod-php8.2 8.2.10-2ubuntu2.1
php8.2 8.2.10-2ubuntu2.1
php8.2-cgi 8.2.10-2ubuntu2.1
php8.2-cli 8.2.10-2ubuntu2.1
php8.2-fpm 8.2.10-2ubuntu2.1
php8.2-xml 8.2.10-2ubuntu2.1

Ubuntu 22.04 LTS
libapache2-mod-php8.1 8.1.2-1ubuntu2.17
php8.1 8.1.2-1ubuntu2.17
php8.1-cgi 8.1.2-1ubuntu2.17
php8.1-cli 8.1.2-1ubuntu2.17
php8.1-fpm 8.1.2-1ubuntu2.17
php8.1-xml 8.1.2-1ubuntu2.17

Ubuntu 20.04 LTS
libapache2-mod-php7.4 7.4.3-4ubuntu2.22
php7.4 7.4.3-4ubuntu2.22
php7.4-cgi 7.4.3-4ubuntu2.22
php7.4-cli 7.4.3-4ubuntu2.22
php7.4-fpm 7.4.3-4ubuntu2.22
php7.4-xml 7.4.3-4ubuntu2.22

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-6757-2
https://ubuntu.com/security/notices/USN-6757-1
CVE-2022-4900, CVE-2024-2756, CVE-2024-3096

Package Information:
https://launchpad.net/ubuntu/+source/php8.2/8.2.10-2ubuntu2.1
https://launchpad.net/ubuntu/+source/php8.1/8.1.2-1ubuntu2.17
https://launchpad.net/ubuntu/+source/php7.4/7.4.3-4ubuntu2.22

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