Overview

A critical vulnerability (CVE-2025-48384) has been identified in Git, the widely used distributed version control system. The flaw enables remote code execution (RCE) when users interact with specially crafted configuration files. Security researchers have confirmed active exploitation of this vulnerability in the wild.

• CVSS v3 Score: 9.0 (Critical)

• Affected Versions: Multiple Git releases across Linux, macOS, and Windows platforms prior to patched builds

• Impact: Remote attackers can execute arbitrary commands, compromise developer systems, poison source repositories, and enable supply-chain attacks

 Technical Details

• Vulnerability Type: Input Validation Failure → Arbitrary Code Execution

• Root Cause: Improper handling of carriage return (CR) characters in Git config files. Attackers can abuse malformed configuration entries to inject commands.

• Attack Vector:

  1. A victim clones or fetches a repository containing a malicious .git/config or submodule configuration.

  2. When Git parses the file, the malformed entries trigger execution of attacker-supplied commands.

  3. Attacker gains remote execution privileges on the developer’s machine.

• MITRE ATT&CK Mapping:

  • T1190: Exploit Public-Facing Application

  • T1059: Command and Scripting Interpreter

  • T1554: Compromise Client Application Binary

  • T1195: Supply Chain Compromise

 Threat Actor Perspective

• Initial Access: Attackers may poison GitHub / GitLab repos with malicious submodules or pull requests.

• Execution: On victim machines, RCE can drop malware, steal SSH keys, exfil API tokens, or implant backdoors.

• Persistence: Malicious Git hooks (pre-commit, post-checkout) can ensure long-term access.

• Targets: DevOps pipelines, CI/CD systems, enterprise developers, open-source contributors.

 Detection & Hunting Guidance

Indicators of Exploitation (IOCs)

• Suspicious Git config entries containing unexpected CR (\r) or unusual escape sequences

• Execution of binaries during Git clone/pull operations

• New/unexpected files appearing in .git/hooks/

Hunting Queries

• Linux/macOS Audit Logs

  grep -r $'\r' .git/config
  grep -r 'pre-commit' .git/hooks/
  

• Windows Sysmon / EDR

  index=endpoint 
  | where process="git.exe" AND child_process IN ("powershell.exe","cmd.exe","bash")
  

 Mitigation & Patch Guidance

• Upgrade Immediately: Update Git to the latest patched versions (2.47.1+, per vendor advisories).

• Repository Hygiene:

  • Disable automatic submodule initialization (git config --global submodule.recurse false)

  • Scan repositories for abnormal .git/config entries

• DevSecOps Controls:

  • Integrate SAST/DAST scanners for repos before CI/CD pipeline use

  • Enforce signed commits/tags to prevent tampered code imports

 Lessons Learned

• Even “trusted developer tools” like Git can be exploited for supply-chain compromise.

• Attackers are increasingly abusing developer ecosystems (IDE plugins, GitHub repos, container registries).

• Every organization must treat developer workstations as high-value assets, applying EDR, hardening, and Zero Trust.

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