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A flaw was discovered in FasterXML jackson-databind in all versions before 2.9.10 and 2.10.0, where it would permit polymorphic deserialization of malicious objects using the xalan JNDI gadget when used in conjunction with polymorphic type handling methods such as `enableDefaultTyping()` or when @JsonTypeInfo is using `Id.CLASS` or `Id.MINIMAL_CLASS` or in any other way which ObjectMapper.readValue might instantiate objects from unsafe sources. An attacker could use this flaw to execute arbitrary code.

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可信数据的反序列化

FasterXML jackson-databind 代码问题漏洞

FasterXML jackson-databind是一个基于JAVA可以将XML和JSON等数据格式与JAVA对象进行转换的库。Jackson可以轻松的将Java对象转换成json对象和xml文档，同样也可以将json、xml转换成Java对象。 FasterXML jackson-databind 2.8.11.5之前版本和2.9.0版本及之后版本（2.9.10版本已修复）中存在代码问题漏洞。攻击者可利用该漏洞执行任意代码。

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