CVE-2019-11043 log

Source	CVE Red Hat MITRE NVD Debian Ubuntu SUSE Alpine Mageia CVE Details CIRCL Bugs Arch Linux Red Hat Gentoo SUSE GitHub Lists oss-security full-disclosure bugtraq Misc GitHub code web search
Severity	Critical
Remote	Yes
Type	Arbitrary code execution
Description	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.

Group	Package	Affected	Fixed	Severity	Status	Ticket
AVG-1052	php	7.3.10-1	7.3.11-1	Critical	Fixed

Date	Advisory	Group	Package	Severity	Type
25 Oct 2019	ASA-201910-14	AVG-1052	php	Critical	arbitrary code execution

References
https://bugs.php.net/bug.php?id=78599 https://git.php.net/?p=php-src.git;a=commitdiff;h=19e17d3807e6cc0b1ba9443ec5facbd33a61f8fe https://github.com/neex/phuip-fpizdam

Notes
Workaround: 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 exploitation.

Notes

Workaround:
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 exploitation.