ArchLinux: 201910-14: php: arbitrary code execution

    Date 28 Oct 2019
    Posted By LinuxSecurity Advisories
    The package php before version 7.3.11-1 is vulnerable to arbitrary code execution.
    Arch Linux Security Advisory ASA-201910-14
    Severity: Critical
    Date    : 2019-10-25
    CVE-ID  : CVE-2019-11043
    Package : php
    Type    : arbitrary code execution
    Remote  : Yes
    Link    :
    The package php before version 7.3.11-1 is vulnerable to arbitrary code
    Upgrade to 7.3.11-1.
    # pacman -Syu "php>=7.3.11-1"
    The problem has been fixed upstream in version 7.3.11.
    If nginx and php-fpm share the same filesystem, one can first check the
    script actually exists, so the malicious request will never make it to
    php-fpm (it is usually done using something like `try_files $uri
    =404`). Or there may be cgi.fix_pathinfo=0 which will also prevent
    A buffer underflow issue has been found in the php-fpm component of php
    before 7.3.11, 7.2.24 and 7.1.33, leading to remote code execution in
    certain nginx + php-fpm configurations. This vulnerability can be
    exploited if the fastcgi_split_path_info directive contains a regexp
    that can be broken by an attacker by supplying %0a in the path info
    which results in the fastcgi_param PATH_INFO being empty.
    A remote attacker is able to execute arbitrary code on the affected
    host by supplying %0a in the path info if php-fpm is used with a
    vulnerable nginx configuration.

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