Описание
Insufficient input sanitization in ejson2env
Summary
The ejson2env tool has a vulnerability related to how it writes to stdout. Specifically, the tool is intended to write an export statement for environment variables and their values. However, due to inadequate output sanitization, there is a potential risk where variable names or values may include malicious content, resulting in additional unintended commands being output to stdout. If this output is improperly utilized in further command execution, it could lead to command injection vulnerabilities, allowing an attacker to execute arbitrary commands on the host system.
Details
The vulnerability exists because environment variables are not properly sanitized during the decryption phase, which enables malicious keys or encrypted values to inject commands.
Impact
An attacker with control over .ejson files can inject commands in the environment where source $(ejson2env) or eval ejson2env are executed.
Mitigation
- Update to a version of
ejson2envthat sanitizes the output during decryption or - Do not use
ejson2envto decrypt untrusted user secrets or - Do not evaluate or execute the direct output from
ejson2envwithout removing nonprintable characters.
Credit
Thanks to security researcher Demonia for reporting this issue.
Ссылки
Пакеты
github.com/Shopify/ejson2env/v2
< 2.0.8
2.0.8
ejson2env
< 2.0.8
2.0.8
github.com/Shopify/ejson2env
Отсутствует
Связанные уязвимости
ejson2env allows users to decrypt EJSON secrets and export them as environment variables. Prior to version 2.0.8, the `ejson2env` tool has a vulnerability related to how it writes to `stdout`. Specifically, the tool is intended to write an export statement for environment variables and their values. However, due to inadequate output sanitization, there is a potential risk where variable names or values may include malicious content, resulting in additional unintended commands being output to `stdout`. If this output is improperly utilized in further command execution, it could lead to command injection, allowing an attacker to execute arbitrary commands on the host system. Version 2.0.8 sanitizes output during decryption. Other mitigations involve avoiding use of `ejson2env` to decrypt untrusted user secrets and/or avoiding evaluating or executing the direct output from `ejson2env` without removing nonprintable characters.