漏洞信息
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Vulnerability Title
libexpat through 2.9.0 Denial of Service via Billion Laughs Detection Delay
Vulnerability Description
libexpat through 2.9.0 contains a denial of service vulnerability because billion laughs protection in accountingDiffTolerated() in xmlparse.c detects entity amplification too late. Attackers can supply a moderately sized XML document with a large DTD and nested entity expansions to consume tens of seconds of CPU per parse.
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Vulnerability Type
DTD中递归实体索引的不恰当限制(XML实体扩展)