#VU18379 Out-of-bounds read in PHP - CVE-2019-11034

Vulnerability identifier: #VU18379

Vulnerability risk: Medium

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-11034

CWE-ID: CWE-125

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 gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition within the exif_process_IFD_TAG() 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.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

PHP: 7.1.0 - 7.1.27, 7.2.0 - 7.2.16, 7.3.0 - 7.3.3

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External links
https://bugs.php.net/bug.php?id=77753

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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.