SERVER-WEBAPP -- Snort has detected traffic exploiting vulnerabilities in web based applications on servers.
SERVER-WEBAPP PHP tag depth heap memory corruption attempt
This rule attempts to identify payloads with deeply nested XML documents.
What To Look For
This rule alerts when an attempt to exploit a heap memory overflow deficiency in PHP before 5.3.27
No public information
No known false positives
Cisco Talos Intelligence Group
MITRE ATT&CK Framework
Technique: Network Denial of Service
For reference, see the MITRE ATT&CK vulnerability types here:
Buffer Overflows occur when a memory location is filled past its expected boundaries. Computer attackers target systems without proper terminating conditions on buffers, which then write the additional information in other locations in memory, overwriting what is there. This could corrupt the data, making the system behave erratically or crash. The new information could include malicious executable code, which might be executed.
CVE Additional Information
CVE-2013-4113ext/xml/xml.c in PHP before 5.3.27 does not properly consider parsing depth, which allows remote attackers to cause a denial of service (heap memory corruption) or possibly have unspecified other impact via a crafted document that is processed by the xml_parse_into_struct function.
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