#VU40100 Information disclosure in PHP - CVE-2016-7128

Vulnerability identifier: #VU40100

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2016-7128

CWE-ID: CWE-200

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
PHP
Universal components / Libraries / Scripting languages

Vendor: PHP Group

Description

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

The exif_process_IFD_in_TIFF function in ext/exif/exif.c in PHP before 5.6.25 and 7.x before 7.0.10 mishandles the case of a thumbnail offset that exceeds the file size, which allows remote attackers to obtain sensitive information from process memory via a crafted TIFF image.

Mitigation
Install update from vendor's website.

Vulnerable software versions

PHP: 7.0.0 - 7.0.9

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External links
https://openwall.com/lists/oss-security/2016/09/02/9
https://rhn.redhat.com/errata/RHSA-2016-2750.html
https://www.php.net/ChangeLog-5.php
https://www.php.net/ChangeLog-7.php
https://www.securityfocus.com/bid/92564
https://www.securitytracker.com/id/1036680
https://bugs.php.net/bug.php?id=72627
https://github.com/php/php-src/commit/6dbb1ee46b5f4725cc6519abf91e512a2a10dfed?w=1
https://security.gentoo.org/glsa/201611-22
https://www.tenable.com/security/tns-2016-19

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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.