Out-of-bounds read in PHP - CVE-2019-9020
Published: November 1, 2019
Vulnerability identifier: #VU22475
CSH Severity: Medium
CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-9020
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition within the xml_elem_parse_buf() in ext/xmlrpc/libxmlrpc/xml_element.c when reading XML data via the xmlrpc_decode() PHP function. A remote attacker can create a specially crafted XML file, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.
Affected software
PHP
Red Hat Software Collections
php7 (Alpine package)
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Opensuse
Flex System Chassis Management Module (CMM)
Red Hat Software Collections
php7 (Alpine package)
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Opensuse
Flex System Chassis Management Module (CMM)
How to mitigate CVE-2019-9020
Install updates from vendor's website.
PHP - addressed in versions 5.6.40, 7.1.26, 7.2.14, 7.3.1
php7 (Alpine package) - update to 7.2.17-r0
Flex System Chassis Management Module (CMM) - update to 2pet18c-2.5.16c
php7 (Alpine package) - update to 7.2.17-r0
Flex System Chassis Management Module (CMM) - update to 2pet18c-2.5.16c