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

Cvss 3 Severity Score

8.8

Score breakdown

Status

Package	Release	Status
smarty3 Launchpad, Ubuntu, Debian	jammy	Released (3.1.39-2ubuntu1)
	bionic	Released (3.1.31+20161214.1.c7d42e4+selfpack1-3ubuntu0.1)
	hirsute	Ignored (end of life)
	upstream	Released (3.1.42,4.0.2)
	trusty	Does not exist
	xenial	Released (3.1.21-1ubuntu1+esm1) Available with Ubuntu Pro
	impish	Released (3.1.39-2ubuntu0.21.10.1)
	kinetic	Released (3.1.39-2ubuntu1)
	focal	Released (3.1.34+20190228.1.c9f0de05+selfpack1-1ubuntu0.1~esm1) Available with Ubuntu Pro
	lunar	Released (3.1.39-2ubuntu1)
	mantic	Released (3.1.39-2ubuntu1)
	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

References

Join the discussion

Canonical is offering Expanded Security Maintenance

Canonical is offering Ubuntu Expanded Security Maintenance (ESM) for security fixes and essential packages.

Find out more about ESM ›