SB2021052605 - Gentoo update for Smarty

Description

This security bulletin contains information about 2 vulnerabilities.

1) Security restrictions bypass (CVE-ID: CVE-2021-26119)

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Green

The vulnerability allows a remote user to escalate privileges within the application.

The vulnerability exists due to application does not properly impose security restrictions and allows to escape sandbox by allowing to access the $smarty.template_object. A remote user can perform template injection and execute arbitrary PHP code on the server.

2) Code Injection (CVE-ID: CVE-2021-26120)

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Green

The vulnerability allows a remote user to execute arbitrary PHP code on the target system.

The vulnerability exists due to improper input validation when processing data passed via an unexpected function name after a "{function name=" substring. A remote user can send a specially crafted request and execute arbitrary PHP code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Remediation

Install update from vendor's website.

References

• https://security.gentoo.org/
• https://security.gentoo.org/glsa/202105-06