Arch Linux Security Advisory ASA-202102-15
=========================================
Severity: Medium
Date    : 2021-02-07
CVE-ID  : CVE-2021-21702
Package : php
Type    : denial of service
Remote  : Yes
Link    : https://security.archlinux.org/AVG-1531

Summary
======
The package php before version 8.0.2-1 is vulnerable to denial of
service.

Resolution
=========
Upgrade to 8.0.2-1.

# pacman -Syu "php>=8.0.2-1"

The problem has been fixed upstream in version 8.0.2.

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
;a=commitdiff;h=f733ee195462201b2cbd1d17df2f752ee88771ba
;a=commitdiff;h=91655b45ea0a81f2d3003a7e6604e5f419d84df4
;a=commitdiff;h=3c939e3f69955d087e0bb671868f7267dfb2a502
https://security.archlinux.org/CVE-2021-21702