CVE-2016-5095 : 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 befor

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.

Published 2016-08-07 10:59:08

Updated 2016-11-28 20:22:35

Source MITRE

View at NVD, CVE.org

Vulnerability category: OverflowDenial of service

Threat overview for CVE-2016-5095

Top countries where our scanners detected CVE-2016-5095

Top open port discovered on systems with this issue 80

IPs affected by CVE-2016-5095 396,551

Threat actors abusing to this issue? Yes

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Exploit prediction scoring system (EPSS) score for CVE-2016-5095

EPSS FAQ

2.11%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 88 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2016-5095

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
7.5	HIGH	AV:N/AC:L/Au:N/C:P/I:P/A:P	10.0	6.4	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: Partial
8.6	HIGH	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H	3.9	4.7	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: Low Integrity: Low Availability: High

CWE ids for CVE-2016-5095

CWE-190 Integer Overflow or Wraparound

The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2016-5095

Products affected by CVE-2016-5095