Use-after-free error in PHP - CVE-2018-12882
Published: June 26, 2018 / Updated: June 27, 2018
Vulnerability identifier: #VU13498
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2018-12882
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: PHP Group
Affected software:
PHP
PHP
Detailed vulnerability description
The vulnerability allows a remote attacker to cause DoS condition or execute arbitrary code on the target system.
The vulnerability exists due to use-after-free error when the exif_read_from_impl function, as defined in the ext/exif/exif.c source code file, closes a stream that it is not responsible for closing. A remote unauthenticated attacker can trick the victim into opening a specially crafted file that submits malicious .jpeg input, trigger memory corruption and cause the service to crash or execute arbitrary code with elevated privileges.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
How to mitigate CVE-2018-12882
Install update from vendor's website.
https://bugs.php.net/patch-display.php?bug_id=76409&&patch=avoid-double-free.patch&a...
https://bugs.php.net/patch-display.php?bug_id=76409&&patch=avoid-double-free.patch&a...