Heap-out-of-bounds write in PHP - CVE-2017-9228
Published: July 6, 2017
Vulnerability identifier: #VU7348
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2017-9228
CWE-ID: CWE-787
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 execute arbitrary code.
The weakness exists in the mbstring due to heap out-of-bounds write in bitset_set_range() during regular expression compilation due to incorrect state transition in parse_char_class(). A remote attacker can trigger out-of-bounds write memory corruption and execute arbitrary code with web server privileges.
Successful exploitation of the vulnerability may result in system compromise.
The weakness exists in the mbstring due to heap out-of-bounds write in bitset_set_range() during regular expression compilation due to incorrect state transition in parse_char_class(). A remote attacker can trigger out-of-bounds write memory corruption and execute arbitrary code with web server privileges.
Successful exploitation of the vulnerability may result in system compromise.
How to mitigate CVE-2017-9228
Update to version 7.0.21.