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AUSCERT External Security Bulletin Redistribution
ESB-2022.1305
USN-5348-1: Smarty vulnerabilities
29 March 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: Smarty
Publisher: Ubuntu
Operating System: Ubuntu
Resolution: Patch/Upgrade
CVE Names: CVE-2021-29454 CVE-2021-26120 CVE-2021-26119
CVE-2021-21408 CVE-2018-16831 CVE-2018-13982
Original Bulletin:
https://ubuntu.com/security/notices/USN-5348-1
Comment: CVSS (Max): 9.8 CVE-2021-26120 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
CVSS Source: NVD
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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USN-5348-1: Smarty vulnerabilities
28 March 2022
Several security issues were fixed in Smarty.
Releases
o Ubuntu 21.10
o Ubuntu 18.04 LTS
Packages
o 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
o smarty3 - 3.1.39-2ubuntu0.21.10.1
Ubuntu 18.04
o smarty3 - 3.1.31+20161214.1.c7d42e4+selfpack1-3ubuntu0.1
In general, a standard system update will make all the necessary changes.
References
o CVE-2021-21408
o CVE-2021-29454
o CVE-2021-26120
o CVE-2018-13982
o CVE-2021-26119
o CVE-2018-16831
Related notices
o USN-5287-1 : smarty3
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