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CVE-2021-29454

Published: 10 January 2022

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.

Priority

High

Cvss 3 Severity Score

8.8

Score breakdown

Status

Package Release Status
smarty3
Launchpad, Ubuntu, Debian
bionic
Released (3.1.31+20161214.1.c7d42e4+selfpack1-3ubuntu0.1)
focal
Released (3.1.34+20190228.1.c9f0de05+selfpack1-1ubuntu0.1~esm1)
hirsute Ignored
(reached end-of-life)
impish
Released (3.1.39-2ubuntu0.21.10.1)
jammy
Released (3.1.39-2ubuntu1)
kinetic
Released (3.1.39-2ubuntu1)
trusty Does not exist

upstream
Released (3.1.42,4.0.2)
xenial
Released (3.1.21-1ubuntu1+esm1)
Patches:
upstream: https://github.com/smarty-php/smarty/commit/7ad97ad030b4289711e30819c928b8bc33c62b23

Severity score breakdown

Parameter Value
Base score 8.8
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H