Horizon Alert
Summary of the vulnerability and why it matters
A critical vulnerability exists in simple-git, a library used by Node.js applications to interact with Git. This issue could allow an attacker to execute arbitrary commands on systems that use the vulnerable library, potentially impacting the confidentiality, integrity, and availability of data and services. The main concern is confirming relevance and exposure due to the library's integration into various applications.
- It lets attackers run commands remotely.
- Matters if you use Node.js for Git operations.
- Confirm if your applications use this library.
Attack Path
How an attacker could exploit the issue
An attacker could exploit this vulnerability by tricking a Node.js application into executing arbitrary commands. This is possible if the application uses a vulnerable version of the simple-git library and allows user-influenced arguments to be passed to Git push operations. By providing specially crafted, abbreviated arguments, an attacker can bypass security checks and cause the application to run commands chosen by the attacker.
- Requires unauthenticated access to an application using simple-git.
- Triggered by crafting specific, abbreviated Git push arguments.
- Risk of arbitrary command execution.
Live Threat
Current exploitation, exposure, and threat context
When supported by the advisory, attacker-influenced push arguments could allow a remote attacker to execute arbitrary commands on a consumer's system through an affected Node.js application utilizing simple-git. This occurs when specific, abbreviated Git push options are used to bypass security checks, enabling Git to invoke commands chosen by the attacker against local, file, or attacker-controlled remotes.
- Arbitrary command execution on the server.
- Malicious Git push arguments bypass checks.
- Compromise of the underlying server.
Operational Fix
Recommended remediation, mitigation, and detection steps
This vulnerability in `simple-git` could allow attackers to execute arbitrary commands on systems running affected Node.js applications. Application owners and platform teams should prioritize identifying instances of `simple-git` within their codebase, assessing their exposure to untrusted input, and planning for updates. The first practical step is to inventory where `simple-git` is used, determine if the affected functionality can be reached by external input, and identify the accountable product owner.
- Application owners should lead remediation efforts.
- Verify if `simple-git` processes untrusted arguments.
- Plan for code updates or vendor coordination.
