Out-of-bounds read in PHP - CVE-2019-11035

Vulnerability identifier: #VU18380

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2019-11035

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 within the exif_iif_add_value() function in PHP EXIF extension when processing certain files. An attacker can pass a specially crafted file to the application,  trigger out-of-bounds read error and read contents of memory on the system or perform a denial of service attack.

PHP
Amazon Linux AMI
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Opensuse
Red Hat Software Collections
php7.0 (Debian package)
php7 (Alpine package)

Install updates from vendor's website.

PHP - addressed in versions 7.1.28, 7.2.17, 7.3.4
php7.0 (Debian package) - update to 7.0.33-0+deb9u5
php7 (Alpine package) - addressed in versions 7.1.30-r0, 7.2.18-r0

• https://bugs.php.net/bug.php?id=77831

• Amazon Linux AMI update for php71, php72, php73
• OpenSUSE Linux update for php7
• Debian update for php7.0
• 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)