OS Command Injection in codecov

1) OS Command Injection

EUVDB-ID: #VU34132

Risk: High

CVSSv3.1: 8.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-15123

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

In codecov (npm package) before version 3.7.1 the upload method has a command injection vulnerability. Clients of the codecov-node library are unlikely to be aware of this, so they might unwittingly write code that contains a vulnerability. A similar CVE (CVE-2020-7597 for GHSA-5q88-cjfq-g2mh) was issued but the fix was incomplete. It only blocked &, and command injection is still possible using backticks instead to bypass the sanitizer. The attack surface is low in this case. Particularly in the standard use of codecov, where the module is used directly in a build pipeline, not built against as a library in another application that may supply malicious input and perform command injection.

Mitigation

Install update from vendor's website.

Vulnerable software versions

codecov: 3.7.0

External links

http://github.com/advisories/GHSA-5q88-cjfq-g2mh
http://github.com/codecov/codecov-node/commit/c0711c656686e902af2cd92d6aecc8074de4d83d
http://github.com/codecov/codecov-node/pull/180
http://github.com/codecov/codecov-node/security/advisories/GHSA-xp63-6vf5-xf3v
http://lgtm.com/query/7714424068617023832

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.