CVE-2021-41170

Evaluation of closures can lead to execution of methods & functions in current program scope

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.

Categories

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.52%
Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com
Affected: sroehrl neoan3-template
Published at:
Updated at:

References

Frequently Asked Questions

What is the severity of CVE-2021-41170?
CVE-2021-41170 has been scored as a critical severity vulnerability.
How to fix CVE-2021-41170?
To fix CVE-2021-41170, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-41170 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-41170 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-41170?
CVE-2021-41170 affects sroehrl neoan3-template.
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