Simple local Spring vulnerability scanner

(Written in Go because, you know, “write once, run anywhere.”)

This is a simple tool that can be used to find instances of Spring vulnerable to CVE-2022-22965 (“SpringShell”) in installations of Java software such as web applications. JAR and WAR archives are inspected and class files that are known to be vulnerable are flagged. The scan happens recursively: WAR files containing WAR files containing JAR files containing vulnerable class files ought to be flagged properly.

The scan tool currently checks for known build artifacts that have been obtained through Maven Central. From-source rebuilds as they are done for Linux distributions may or may not be recognized.

Binaries for x86_64 Windows, Linux, MacOSX for tagged releases are provided via the Releases page.

Using the scanner

$ ./local-spring-vuln-scanner [--verbose] [--quiet] \
    [--exclude /path/to/exclude …] \
	[--scan-network] \
	[--log /path/to/file.log] \
    /path/to/app1 /path/to/app2 …

The --verbose flag will show every .jar and .war file checked, even if no problem is found.

The --quiet flag will supress output except for indicators of a known vulnerability.

The --log flag allows everythig to be written to a log file instead of stdout/stderr.

Use the --exclude flag to exclude subdirectories from being scanned. Can be used multiple times.

The --scan-network flag tells the scanner to search network filesystems (disabled by default). This has not been implemented for Windows.

If class files indicating one of the vulnerabilities are found, messages like the following are printed to standard output:

local-spring-vuln-scanner - a simple local Spring vulnerability scanner

Checking for vulnerabilities: CVE-2022-22965
examining /path/to/spring-boot-0.0.1-SNAPSHOT.jar
indicator for vulnerable component found in /path/to/spring-boot-0.0.1-SNAPSHOT.jar::BOOT-INF/lib/spring-beans-5.3.17.jar (org/springframework/beans/CachedIntrospectionResults.class): CachedIntrospectionResults.class  spring 5.3.0-5.3.17 CVE-2022-22965

Scan finished

Building from source

Install a Go compiler.

Run the following commands in the checked-out repository:

go build

License

GNU General Public License, version 3

Author

Hilko Bengen <[email protected]>

See also

GitHub

View Github