mikef-nl/spring4shell-scanner

Scan systems and docker images for potential spring4shell vulnerabilities. Will detect in-depth (layered archives jar/zip/tar/war and scans for vulnerable Spring4shell versions. Binaries for Windows, Linux and OsX, but can be build on each platform supported by supported Golang.

spring4shell-scanner

This scanner will recursively scan paths including archives for spring libraries and classes that are vulnerable to CVE-2022-22965 and CVE-2022-22963.

Currently the allow list defines non exploitable versions, in this case spring-beans 5.3.18 and 5.2.20 and spring cloud function context 3.2.3

Features

• scans recursively through all archives in archives in archives in archives etc
• scan for known spring libraries (sha256 hash)
• scan for CachedIntrospectionResults.class files
• fast
• show related CVE's found by version
• detects class files with different extensions (eg .ezclass)
• scans through all layers of local- and remote docker images
• binary versions available for Windows, Linux and MacOS

References

CVE	References
CVE-2022-22965	https://tanzu.vmware.com/security/cve-2022-22965
CVE-2022-22963	https://tanzu.vmware.com/security/cve-2022-22963

Links

• https://www.cyberkendra.com/2022/03/springshell-rce-0-day-vulnerability.html
• https://bugalert.org/content/notices/2022-03-29-spring.html
• https://websecured.io/blog/624411cf775ad17d72274d16/spring4shell-poc
• https://www.springcloud.io/post/2022-03/spring-0day-vulnerability

Scanning

Usage

Windows

$ spring4shell-scanner.exe {target-path}

Linux / OSX / FreeBSD

$ spring4shell-scanner {target-path}

Docker containers

Using the tool you can now also scan containers:

$ ./spring4shell-scanner scan-image logstash:7.16.1

or local images:

$ ./spring4shell-scanner scan-image --local {sha256|pattern}
$ ./spring4shell-scanner scan-image --local log4shell:latest
$ ./spring4shell-scanner scan-image --local 4949add9e671

# scan all local images
$ ./spring4shell-scanner scan-image --local 

Usage

Windows

$ spring4shell-scanner.exe patch {target-path}

Linux / OSX / FreeBSD

spring4shell-scanner patch {target-path}

Build from source

Requirements:

• Go 1.16 or newer

For development

$ git clone "https://github.com/dtact/spring4shell-scanner.git"
$ go build -o ./.builds/spring4shell-scanner ./main.go

Copyright and license

Code and documentation copyright 2022 Remco Verhoef (DTACT).

Code released under the MIT license.