Описание
ScanCode.io command injection in docker image fetch process
Command Injection in docker fetch process
Summary
A possible command injection in the docker fetch process as it allows to append malicious commands in the docker_reference parameter.
Details
In the function scanpipe/pipes/fetch.py:fetch_docker_image
[1] the parameter docker_reference
is user controllable. The docker_reference
variable is then passed to the vulnerable function get_docker_image_platform
.
However, the get_docker_image_plaform
function constructs a shell command with the passed docker_reference
. The pipes.run_command
then executes the shell command without any prior sanitization, making the function vulnerable to command injections.
A malicious user who is able to create or add inputs to a project can inject commands. Although the command injections are blind and the user will not receive direct feedback without logs, it is still possible to cause damage to the server/container. The vulnerability appears for example if a malicious user adds a semicolon after the input of docker://;
, it would allow appending malicious commands.
PoC
-
Create a new project with following input
docker://;echo${IFS}"PoC"${IFS}&&cat${IFS}/etc/passwd
in the filed Download URLs -
Check docker logs to see the command execution
Mitigations
The docker_reference
input should be sanitized to avoid command injections and it is not recommend to create commands with user controlled input directly.
Tested on:
- Commit: Latest commit [bda3a70e0b8cd95433928db1fd4b23051bc7b7eb]
- OS: Ubuntu Linux Kernel 5.19.0
References [1] https://github.com/nexB/scancode.io/blob/main/scanpipe/pipes/fetch.py#L185
Ссылки
- https://github.com/nexB/scancode.io/security/advisories/GHSA-2ggp-cmvm-f62f
- https://nvd.nist.gov/vuln/detail/CVE-2023-39523
- https://github.com/nexB/scancode.io/commit/07ec0de1964b14bf085a1c9a27ece2b61ab6105c
- https://github.com/nexB/scancode.io/blob/main/scanpipe/pipes/fetch.py#L185
- https://github.com/nexB/scancode.io/releases/tag/v32.5.1
Пакеты
scancodeio
<= 32.5.0
32.5.1
Связанные уязвимости
ScanCode.io is a server to script and automate software composition analysis with ScanPipe pipelines. Prior to version 32.5.1, the software has a possible command injection vulnerability in the docker fetch process as it allows to append malicious commands in the `docker_reference` parameter. In the function `scanpipe/pipes/fetch.py:fetch_docker_image` the parameter `docker_reference` is user controllable. The `docker_reference` variable is then passed to the vulnerable function `get_docker_image_platform`. However, the `get_docker_image_plaform` function constructs a shell command with the passed `docker_reference`. The `pipes.run_command` then executes the shell command without any prior sanitization, making the function vulnerable to command injections. A malicious user who is able to create or add inputs to a project can inject commands. Although the command injections are blind and the user will not receive direct feedback without logs, it is still possible to cause damage to th
Уязвимость функции fetch_docker_image() средства автоматизации процесса анализа программного обеспечения ScanCode.io, позволяющая нарушителю выполнить произвольные команды