Out-of-bounds read in PHP - CVE-2019-9640

Vulnerability identifier: #VU21219

CSH Severity: Low

CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2019-9640

CWE-ID: CWE-125

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in exif_process_SOFn within the PHP EXIF component. A remote attacker can create a specially crafted image file, pass it to the affected application, trigger out-of-bounds read error and read contents of memory on the system.

PHP
Amazon Linux AMI
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for ARM 64
Red Hat Software Collections
php7 (Alpine package)
Flex System Chassis Management Module (CMM)

Install updates from vendor's website.

PHP - addressed in versions 7.1.27, 7.2.16, 7.3.3
php7 (Alpine package) - addressed in versions 7.1.30-r0, 7.2.17-r0
Flex System Chassis Management Module (CMM) - update to 2pet18c-2.5.16c

• https://bugs.php.net/bug.php?id=77540

• Amazon Linux AMI update for php71, php72, php73
• Red Hat update for rh-php72-php
• Red Hat Enterprise Linux 8 update for the php:7.2 module
• Out-of-bounds read in php7 (Alpine package)
• Multiple vulnerabilities in IBM Flex System Chassis Management Module (CMM)