SHIRO-721 RememberMe Padding Oracle Vulnerability RCE

0x00 Introduction:

The RememberMe cookie is encrypted using AES-128-CBC mode, which is vulnerable to padding oracle attacks.

An attacker can use a valid RememberMe cookie as a prefix for a Padding Oracle Attack, and then craft a malicious RememberMe to perform a Java deserialization attack, such as SHIRO-550.

0x01 Steps to reproduce the issue:

Log in to the website and obtain the RememberMe cookie.
Use the RememberMe cookie as a prefix for the Padding Oracle Attack.
Encrypt ysoserial's serialized payload to craft a malicious RememberMe via the Padding Oracle Attack.
Request the website with the new RememberMe cookie to execute the deserialization attack.
The attacker does not need to know the secret key used to encrypt the RememberMe cookie.

0x02 Affected versions

1.2.5, 
1.2.6, 
1.3.0, 
1.3.1, 
1.3.2, 
1.4.0-RC2, 
1.4.0, 
1.4.1

rememberMeManager cipherKey

root@kali:/opt/tomcat/apache-tomcat-8.5.47/webapps/samples-web-1.5.0-SNAPSHOT# cat ./WEB-INF/shiro.ini |grep cipherKey

# We need to set the cipherKey, if you want the rememberMe cookie to work after restarting or on multiple nodes.

securityManager.rememberMeManager.cipherKey = kPH+bIxk5D2deZiIxcaaaA==

default WEB-INF jar

./WEB-INF/lib/commons-beanutils-1.9.4.jar
./WEB-INF/lib/commons-codec-1.13.jar
./WEB-INF/lib/commons-collections-3.2.2.jar
./WEB-INF/lib/jcl-over-slf4j-1.7.26.jar
./WEB-INF/lib/log4j-1.2.17.jar
./WEB-INF/lib/shiro-cache-1.5.0-SNAPSHOT.jar
./WEB-INF/lib/shiro-config-core-1.5.0-SNAPSHOT.jar
./WEB-INF/lib/shiro-config-ogdl-1.5.0-SNAPSHOT.jar
./WEB-INF/lib/shiro-core-1.5.0-SNAPSHOT.jar
./WEB-INF/lib/shiro-crypto-cipher-1.5.0-SNAPSHOT.jar
./WEB-INF/lib/shiro-crypto-core-1.5.0-SNAPSHOT.jar
./WEB-INF/lib/shiro-crypto-hash-1.5.0-SNAPSHOT.jar
./WEB-INF/lib/shiro-event-1.5.0-SNAPSHOT.jar
./WEB-INF/lib/shiro-lang-1.5.0-SNAPSHOT.jar
./WEB-INF/lib/shiro-web-1.5.0-SNAPSHOT.jar
./WEB-INF/lib/slf4j-api-1.7.26.jar
./WEB-INF/lib/slf4j-log4j12-1.7.26.jar
./WEB-INF/lib/taglibs-standard-impl-1.2.5.jar
./WEB-INF/lib/taglibs-standard-spec-1.2.5.jar

Reference links:

https://issues.apache.org/jira/browse/SHIRO-721

Vulnerability reproduction https://www.anquanke.com/post/id/192819

SHIRO-721

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