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CVE-2021-29454

Sandbox Escape by math function in smarty

Published: Jan 10, 2022Updated: Nov 21, 2024 Sources: CVE List NVD GHSA BDUCWE-74
NVD MITRE
8.1CVSSHIGH
EPSS Score
1.9%
Top 22.7%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:UC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-74

Affected Products

smartysmarty
Library
OSS Libraries / generic-library
debian linuxdebian
On-premOS
Operating Systems / linux-distro
fedorafedoraproject
On-premOS
Operating Systems / linux-distro
smarty/smartyPackagistOSS Libraries
smartysmarty-php
Library
OSS Libraries / generic-library
smartyoss-projectOSS Librariesaka smarty template engine, smarty
debianoss-projectGBOperating Systemsaka debian gnu/linux
fedoraprojectoss-projectUSOperating Systemsaka fedora project
packagistpackage-ecosystemOSS Libraries
smarty-phposs-projectOSS Librariesaka smarty-php, smarty
and 1 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

https://github.com/smarty-php/smarty/commit/215d81a9fa3cd63d82fb3ab56ecaf97cf1e7db71
github.com
https://github.com/smarty-php/smarty/releases/tag/v3.1.42
github.com
https://github.com/smarty-php/smarty/releases/tag/v4.0.2
github.com
and 21 more references View all →

Timeline

Published
Jan 10, 2022
Last Updated
Nov 21, 2024

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