Vulnerability · Published Nov 8, 2021 · Assigned by GitHub_M
CVE-2021-41170Evaluation of closures can lead to execution of methods & functions in current program scope
Critical 9.8
In plain English
A critical-severity injection in neoan3-template from sroehrl. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.6% (higher than 76% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
neoan3-apps/template is a neoan3 minimal template engine. Versions prior to 1.1.1 have allowed for passing in closures directly into the template engine. As a result values that are callable are executed by the template engine. The issue arises if a value has the same name as a method or function in scope and can therefore be executed either by mistake or maliciously. In theory all users of the package are affected as long as they either deal with direct user input or database values. A multi-step attack on is therefore plausible. Version 1.1.1 has addressed this vulnerability. Unfortunately only working with hardcoded values is safe in prior versions. As this likely defeats the purpose of a template engine, please upgrade.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist | neoan3-apps/template | 1.1.1 | GHSA-3v56-q6r6-4gcw |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| sroehrl | neoan3-template | < 1.1.1 |
Weakness: CWE-277, CWE-74 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H