CVE-2021-29454

Sandbox Escape by math function in smarty

Description

Smarty is a template engine for PHP, facilitating the separation of presentation (HTML/CSS) from application logic. Prior to versions 3.1.42 and 4.0.2, template authors could run arbitrary PHP code by crafting a malicious math string. If a math string was passed through as user provided data to the math function, external users could run arbitrary PHP code by crafting a malicious math string. Users should upgrade to version 3.1.42 or 4.0.2 to receive a patch.

Category

8.1
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.39%
Vendor Advisory debian.org Vendor Advisory gentoo.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory smarty.net
Affected: smarty-php smarty
Published at:
Updated at:

References

Link Tags
https://github.com/smarty-php/smarty/security/advisories/GHSA-29gp-2c3m-3j6m third party advisory
https://github.com/smarty-php/smarty/commit/215d81a9fa3cd63d82fb3ab56ecaf97cf1e7db71 third party advisory patch
https://github.com/smarty-php/smarty/releases/tag/v3.1.42 third party advisory release notes
https://github.com/smarty-php/smarty/releases/tag/v4.0.2 third party advisory release notes
https://packagist.org/packages/smarty/smarty third party advisory product
https://www.smarty.net/docs/en/language.function.math.tpl vendor advisory
https://lists.debian.org/debian-lts-announce/2022/05/msg00005.html third party advisory mailing list
https://www.debian.org/security/2022/dsa-5151 third party advisory vendor advisory
https://security.gentoo.org/glsa/202209-09 third party advisory vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L777JIBIWJV34HS7LXPIDWASG7TT4LNI/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BRAJVDRGCIY5UZ2PQHKDTT7RMKG6WJQQ/ vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-29454?
CVE-2021-29454 has been scored as a high severity vulnerability.
How to fix CVE-2021-29454?
To fix CVE-2021-29454, 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-2021-29454 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-29454 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-29454?
CVE-2021-29454 affects smarty-php smarty.
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