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CVE-2016-5095

8.6 · HIGH

Integer overflow in the php_escape_html_entities_ex function in ext/standard/html.c in PHP before 5.5.36 and 5.6.x before 5.6.22 allows remote attackers to cause a denial of service or possibly hav…

Published Aug 7, 2016CWE-190EPSS 2.64%

Overview

CVE-2016-5095 is a high-severity vulnerability. It was published on August 7, 2016 and has a CVSS 3.0 base score of 8.6 (HIGH).

This vulnerability has a CVSS 3.0 base score of 8.6, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Integer overflow in the php_escape_html_entities_ex function in ext/standard/html.c in PHP before 5.5.36 and 5.6.x before 5.6.22 allows remote attackers to cause a denial of service or possibly have unspecified other impact by triggering a large output string from a FILTER_SANITIZE_FULL_SPECIAL_CHARS filter_var call. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-5094.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refphp.net/ChangeLog-5.phpRefwww.debian.org/security/2016/dsa-3602Refwww.openwall.com/lists/oss-security/2016/05/26/3Refwww.securityfocus.com/bid/92144Refbugs.php.net/bug.php?id=72135GitHubgist.github.com/8ef775c117d84ff15185953990a28576Refphp.net/ChangeLog-5.phpRefwww.debian.org/security/2016/dsa-3602Refwww.openwall.com/lists/oss-security/2016/05/26/3Refwww.securityfocus.com/bid/92144

How CyberStrike helps

Frequently asked questions

What is CVE-2016-5095?

CVE-2016-5095 is a high-severity vulnerability. It was published on August 7, 2016 and has a CVSS 3.0 base score of 8.6 (HIGH).

How severe is CVE-2016-5095?

This vulnerability has a CVSS 3.0 base score of 8.6, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2016-5095?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2016-5095?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2016-5095 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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