Ubuntu Security Notice USN-6757-2

Ubuntu Security Notice 6757-2 - 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. 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.

arbitrary code attacker code crash fixes issue lts notice php problem security security notice ubuntu ubuntu 20.04 ubuntu 22.04 ubuntu 23.10 update usn variable vulnerabilities