Buffer overflow in PHP

1) Buffer overflow

EUVDB-ID: #VU31152

Risk: High

CVSSv4.0: 8.1 [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-2019-9025

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

An issue was discovered in PHP 7.3.x before 7.3.1. An invalid multibyte string supplied as an argument to the mb_split() function in ext/mbstring/php_mbregex.c can cause PHP to execute memcpy() with a negative argument, which could read and write past buffers allocated for the data.

Mitigation

Install update from vendor's website.

Vulnerable software versions

PHP: 7.3.0alpha1 - 7.3.0

CPE2.3

• cpe:2.3:a:php_group:php:7.3.0:*:*:*:*:*:*:*

External links

https://bugs.php.net/bug.php?id=77367
https://security.netapp.com/advisory/ntap-20190321-0001/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.