========================================================================== Ubuntu Security Notice USN-5348-1 March 28, 2022 smarty3 vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 21.10 - Ubuntu 18.04 LTS Summary: Several security issues were fixed in Smarty. Software Description: - smarty3: The compiling PHP template engine Details: David Gnedt and Thomas Konrad discovered that Smarty was incorrectly sanitizing the paths present in the templates. An attacker could possibly use this use to read arbitrary files when controlling the executed template. (CVE-2018-13982) It was discovered that Smarty was incorrectly sanitizing the paths present in the templates. An attacker could possibly use this use to read arbitrary files when controlling the executed template. (CVE-2018-16831) It was discovered that Smarty was incorrectly validating security policy data, allowing the execution of static classes even when not permitted by the security settings. An attacker could possibly use this issue to execute arbitrary code. (CVE-2021-21408) It was discovered that Smarty was incorrectly managing access control to template objects, which allowed users to perform a sandbox escape. An attacker could possibly use this issue to send specially crafted input to applications that use Smarty and execute arbitrary code. (CVE-2021-26119) It was discovered that Smarty was not checking for special characters when setting function names during plugin compile operations. An attacker could possibly use this issue to send specially crafted input to applications that use Smarty and execute arbitrary code. (CVE-2021-26120) It was discovered that Smarty was incorrectly sanitizing characters in math strings processed by the math function. An attacker could possibly use this issue to send specially crafted input to applications that use Smarty and execute arbitrary code. (CVE-2021-29454) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 21.10: smarty3 3.1.39-2ubuntu0.21.10.1 Ubuntu 18.04 LTS: smarty3 3.1.31+20161214.1.c7d42e4+selfpack1-3ubuntu0.1 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-5348-1 CVE-2018-13982, CVE-2018-16831, CVE-2021-21408, CVE-2021-26119, CVE-2021-26120, CVE-2021-29454 Package Information: https://launchpad.net/ubuntu/+source/smarty3/3.1.39-2ubuntu0.21.10.1 https://launchpad.net/ubuntu/+source/smarty3/3.1.31+20161214.1.c7d42e4+selfpack1-3ubuntu0.1