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https://github.com/j5s/accelerator
Use Golang to batch analyze class files for Java security research
https://github.com/j5s/accelerator
Last synced: 22 days ago
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Use Golang to batch analyze class files for Java security research
- Host: GitHub
- URL: https://github.com/j5s/accelerator
- Owner: j5s
- License: mit
- Created: 2022-05-18T04:47:34.000Z (over 2 years ago)
- Default Branch: master
- Last Pushed: 2022-05-18T04:24:28.000Z (over 2 years ago)
- Last Synced: 2024-08-05T17:29:31.619Z (4 months ago)
- Homepage:
- Size: 43 KB
- Stars: 13
- Watchers: 0
- Forks: 3
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
- awesome-hacking-lists - j5s/accelerator - Use Golang to batch analyze class files for Java security research (Go)
README
# Accelerator
[中文介绍](https://github.com/4ra1n/accelerator/tree/master/doc)
Batch analysis jar packages using Golang
Use to detect security vulnerabilities
This will be much simpler and faster than Java ASM
The tool is an auxiliary tool that can help security researchers analyze jar files quickly, especially for some closed source projects
The advantage of using this is that it is easy to start and efficient detection
The disadvantage of using this is that it cannot be customized too much, and there is the possibility of false positives in the case of multiple instructions
## Quick Start
accelerator need a rule file (default: rule.txt)
Enter a directory of jar files, accelerator will scan all jar files and extract them
```shell
./accelerator -rule your_rule_file -jars your_jar_dir
```
In the writing of rule, only **INVOKE** instruction is supported at present
```text
INVOKEVIRTUAL ... *
```
If a single instruction is written, the detection is successful if the corresponding instruction in a method
Usually, the desc attribute is not easy to remember, so wildcards such as * are supported
```text
INVOKEVIRTUAL [first rule] *
INVOKEVIRTUAL [next rule] *
...
```
Rules that support multiple **INVOKE** instructions at the same time
If the instruction set in the target method matches the calling order of multiple instructions, it is considered to match
## How it Works
(1) Unzip the jar file to get all the class files
(2) The class file is parsed according to the Oracle Java Specification
(3) Parse all methods in the method area of all classes to obtain the instruction set
(4) Improve instruction content by finding constant pool
(5) Parse the user rule and match it with the current method instruction set
## Examples
Native SQL Inject Rule
```text
INVOKEVIRTUAL java/lang/StringBuilder.append *
INVOKEINTERFACE java/sql/Statement.executeQuery *
```
SQL Inject JdbcTemplate Rule
```text
INVOKEVIRTUAL java/lang/StringBuilder.append *
INVOKEVIRTUAL org/springframework/jdbc/core/JdbcTemplate.query *
```
Simple RCE Rule
```text
INVOKEVIRTUAL java/lang/Runtime.exec *
```
Simple RCE Rule (Command Inject)
```text
INVOKEVIRTUAL java/lang/StringBuilder.append *
INVOKEVIRTUAL java/lang/Runtime.exec *
```
Some SSRF Rule
- INVOKEVIRTUAL java/net/URL.openConnection *
- INVOKEVIRTUAL org/apache/http/impl/client/CloseableHttpClient.execute *
- INVOKEINTERFACE okhttp3/Call.execute *
## Practice
### log4j-core-2.14.0.jar
Rule
```text
INVOKEINTERFACE javax/naming/Context.lookup *
```
Result
```text
org/apache/logging/log4j/core/net/JndiManager lookup
```
### spring-cloud-gateway-server-3.0.6.jar
Rule
```text
INVOKEINTERFACE org/springframework/expression/Expression.getValue *
```
Result
```text
org/springframework/cloud/gateway/discovery/DiscoveryClientRouteDefinitionLocator buildRouteDefinition
org/springframework/cloud/gateway/discovery/DiscoveryClientRouteDefinitionLocator getValueFromExpr
org/springframework/cloud/gateway/discovery/DiscoveryClientRouteDefinitionLocator lambda$getRouteDefinitions$2
org/springframework/cloud/gateway/support/ShortcutConfigurable getValue
```
Rule
```text
INVOKESPECIAL org/springframework/expression/spel/support/StandardEvaluationContext. *
INVOKEVIRTUAL org/springframework/expression/spel/standard/SpelExpressionParser.parseExpression *
INVOKEINTERFACE org/springframework/expression/Expression.getValue *
```
Result
```text
org/springframework/cloud/gateway/support/ShortcutConfigurable getValue
```
### spring-cloud-function-context-3.1.0.jar
Rule
```text
INVOKEINTERFACE org/springframework/expression/Expression.getValue *
```
Result
```text
org/springframework/cloud/function/context/catalog/SimpleFunctionRegistry$FunctionInvocationWrapper parseMultipleValueArguments
org/springframework/cloud/function/context/config/RoutingFunction functionFromExpression
```
Rule
```text
INVOKESPECIAL org/springframework/expression/spel/support/StandardEvaluationContext. *
```
Result
```text
org/springframework/cloud/function/context/config/RoutingFunction
```
## reference
[Java Class File Format](https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html)
[JVM Instruction Set](https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-6.html)