XML Parser Denial of Service Vulnerability

CVE-2016-4539 · HIGH Severity

AV:N/AC:L/AU:N/C:P/I:P/A:P

The xml_parse_into_struct function in ext/xml/xml.c in PHP before 5.5.35, 5.6.x before 5.6.21, and 7.x before 7.0.6 allows remote attackers to cause a denial of service (buffer under-read and segmentation fault) or possibly have unspecified other impact via crafted XML data in the second argument, leading to a parser level of zero.

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