#VU57096 Command Injection in composer - CVE-2021-41116

Vulnerability identifier: #VU57096

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2021-41116

CWE-ID: CWE-77

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
composer
Other software / Other software solutions

Vendor: getcomposer.org

Description

The vulnerability allows a remote attacker to execute arbitrary commands on the target system.

The vulnerability exists due to improper input validation on Windows. A remote unauthenticated attacker can pass specially crafted data to the application and execute arbitrary commands on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

composer: 1.10.0 - 1.10.22, 2.1.0 - 2.1.8

---

External links
https://github.com/composer/composer/commit/ca5e2f8d505fd3bfac6f7c85b82f2740becbc0aa
https://github.com/composer/composer/security/advisories/GHSA-frqg-7g38-6gcf

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.