#VU40283 Stack-based buffer overflow in PHP - CVE-2016-2554

Vulnerability identifier: #VU40283

Vulnerability 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-2016-2554

CWE-ID: CWE-121

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 execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing a crafted TAR archive. A remote unauthenticated attacker can trigger stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

PHP: 5.6.0 - 5.6.17, 7.0.0 - 7.0.2

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External links
https://lists.opensuse.org/opensuse-security-announce/2016-04/msg00052.html
https://lists.opensuse.org/opensuse-security-announce/2016-04/msg00056.html
https://lists.opensuse.org/opensuse-security-announce/2016-04/msg00058.html
https://php.net/ChangeLog-5.php
https://php.net/ChangeLog-7.php
https://rhn.redhat.com/errata/RHSA-2016-2750.html
https://www.ubuntu.com/usn/USN-2952-1
https://www.ubuntu.com/usn/USN-2952-2
https://bugs.php.net/bug.php?id=71488
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731

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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.