#VU16914 NULL pointer dereference in PHP - CVE-2018-19935

Vulnerability identifier: #VU16914

Vulnerability risk: Low

CVSSv4.0: 7.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2018-19935

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
PHP
Universal components / Libraries / Scripting languages

Vendor: PHP Group

Description
The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists due to an error in imap_mail if message args is null. A remote attacker can trigger NULL pointer dereference in imap_mail and cause the service to crash.

Mitigation
Update to versions 7.1.26, 7.2.14.

Vulnerable software versions

PHP: 7.1.0 - 7.1.25, 7.2.0 - 7.2.13

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External links
https://bugs.php.net/bug.php?id=77020

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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. However, proof of concept for this vulnerability is available.