Arch Linux Security Advisory ASA-202102-14 ========================================== Severity: Medium Date : 2021-02-06 CVE-ID : CVE-2021-21702 Package : php7 Type : denial of service Remote : Yes Link : https://security.archlinux.org/AVG-1532 Summary ======= The package php7 before version 7.4.15-1 is vulnerable to denial of service. Resolution ========== Upgrade to 7.4.15-1. # pacman -Syu "php7>=7.4.15-1" The problem has been fixed upstream in version 7.4.15. Workaround ========== None. Description =========== A security issue was found in PHP before versions 8.0.2, 7.4.15 and 7.3.27. PHP will crash with a SIGSEGV via null-pointer dereference whenever an XML is provided to the SoapClient query() function without an existing field. The issue is fixed in versions 8.0.2, 7.4.15 and 7.3.27. Impact ====== A remote attacker might be able to crash PHP via a specially crafted XML payload. References ========== https://bugs.php.net/bug.php?id=80672 https://git.php.net/?p=php-src.git;a=commitdiff;h=f733ee195462201b2cbd1d17df... https://git.php.net/?p=php-src.git;a=commitdiff;h=91655b45ea0a81f2d3003a7e66... https://git.php.net/?p=php-src.git;a=commitdiff;h=3c939e3f69955d087e0bb67186... https://security.archlinux.org/CVE-2021-21702