CVE-2021-21343 is a vulnerability in the popular open-source software project called Git. The vulnerability allows an attacker to execute arbitrary code on the system running the vulnerable version of Git, which could lead to various forms of compromise. The flaw was caused by improper validation of command-line arguments passed to Git's submodules, and was present in all versions of Git before 2.30.1.
The vulnerability was discovered and reported by security researcher Etienne Stalmans on February 8th, 2021. Shortly after the report, the Git project team released a patch to fix the issue in Git version 2.30.1. In addition to the patch, the team also recommended that users upgrade to the latest version of Git as soon as possible to protect themselves from potential attacks.
If left unaddressed, the vulnerability could have allowed attackers to remotely execute arbitrary code on systems running the affected versions of Git. This could potentially allow attackers to take control of the system, steal confidential information or carry out other malicious activities. As such, it is important for organizations and individuals who use Git to stay up-to-date with the latest security patches and updates to minimize vulnerabilities in their systems.