9.3

CVSS Score

3.1

Basic Information

CVE ID

CVE-2020-15123

GHSA ID

GHSA-xp63-6vf5-xf3v

EPSS Score

0.36041%

CWE

CWE-78

Published

7/20/2020

Updated

1/9/2023

KEV Status

Technology

JavaScript

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CVE-2020-15123

CVE-2020-15123: Command injection in codecov (npm package)

Impact

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 was issued: CVE-2020-7597, but the fix was incomplete. It only blocked &, and command injection is still possible using backticks instead to bypass the sanitizer.

We have written a CodeQL query, which automatically detects this vulnerability. You can see the results of the query on the codecov-node project here.

Patches

This has been patched in version 3.7.1

Workarounds

None, however, 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.

References

CVE-2020-7597

For more information

If you have any questions or comments about this advisory:

(GitHub Advisory)

9.3

CVSS Score

3.1

Basic Information

CVE ID

CVE-2020-15123

GHSA ID

GHSA-xp63-6vf5-xf3v

EPSS Score

0.36041%

CWE

CWE-78

Published

7/20/2020

Updated

1/9/2023

KEV Status

Technology

JavaScript

Technical Details

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
codecov	npm	< 3.7.1	3.7.1

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability stems from using execSync with command strings constructed from user-influenced inputs. The GitHub commit diff shows the fix involved replacing execSync with execFileSync (which avoids shell interpretation) in critical paths. The original code concatenated patterns and user-configurable values (like .bowerrc directories) into shell commands without proper escaping, leaving it vulnerable to injection via backticks. The explicit mention of CVE-2020-7597's incomplete fix (blocking '&' but not backticks) and the CodeQL results confirm this pattern.

Vulnerable functions

Only Mi**o us*rs **n s** t*is s**tion

WAF Protection Rules

WAF Rule

### Imp**t T** `uplo**` m*t*o* **s * *omm*n* inj**tion vuln*r**ility. *li*nts o* t** `*o***ov-no**` li*r*ry *r* unlik*ly to ** *w*r* o* t*is, so t**y mi**t unwittin*ly writ* *o** t**t *ont*ins * vuln*r**ility. * simil*r *V* w*s issu**: [*V*-****-**

Reasoning

T** vuln*r**ility st*ms *rom usin* `*x**Syn*` wit* *omm*n* strin*s *onstru*t** *rom us*r-in*lu*n*** inputs. T** *it*u* *ommit *i** s*ows t** *ix involv** r*pl**in* `*x**Syn*` wit* `*x***il*Syn*` (w*i** *voi*s s**ll int*rpr*t*tion) in *riti**l p*t*s.

9.3

Basic Information

Concerned about an active attack path?

CVE-2020-15123: Command injection in codecov (npm package)

Impact

Patches

Workarounds

References

For more information

9.3

Basic Information

Technical Details

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

WAF Protection Rules

WAF Rule

Reasoning

Vulnerability Intelligence
Miggo AI