CVE-2021-26120: Code Injection
First published: Sun Jan 24 2021(Updated: )
Smarty before 3.1.39 allows code injection via an unexpected function name after a {function name= substring.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| composer/smarty/smarty | <=3.1.38 | |
| debian/smarty3 | 3.1.33+20180830.1.3a78a21f+selfpack1-1+deb10u1 3.1.33+20180830.1.3a78a21f+selfpack1-1+deb10u2 3.1.39-2+deb11u1 3.1.47-2 3.1.48-1 | |
| composer/smarty/smarty | <3.1.39 | 3.1.39 |
| Smarty | <3.1.39 | |
| Debian | =9.0 | |
| Debian | =10.0 | |
| Debian | =11.0 |
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Reference Links
- https://srcincite.io/blog/2021/02/18/smarty-template-engine-multiple-sandbox-escape-vulnerabilities.html
- https://github.com/smarty-php/smarty/commit/4f634c0097ab4a8b2adc2a97caacd1676e88f9c8
- https://security-tracker.debian.org/tracker/CVE-2021-26120
- https://github.com/smarty-php/smarty/blob/master/CHANGELOG.md
- https://lists.debian.org/debian-lts-announce/2021/04/msg00004.html
- https://lists.debian.org/debian-lts-announce/2021/04/msg00014.html
- https://security.gentoo.org/glsa/202105-06
- https://www.debian.org/security/2022/dsa-5151
- https://github.com/smarty-php/smarty/security/advisories/GHSA-3rpf-5rqv-689q
- https://nvd.nist.gov/vuln/detail/CVE-2021-26120
- https://github.com/smarty-php/smarty/commit/165f1bd4d2eec328cfeaca517a725b46001de838
- https://github.com/smarty-php/smarty/blob/master/CHANGELOG.md#3139---2021-02-17
- https://github.com/FriendsOfPHP/security-advisories/blob/master/smarty/smarty/CVE-2021-26120.yaml
- https://github.com/advisories/GHSA-3rpf-5rqv-689q (Advisory)
Frequently Asked Questions
What is the severity of CVE-2021-26120?
CVE-2021-26120 has a medium severity rating due to its potential for code injection via malicious function names in Smarty templates.
How do I fix CVE-2021-26120?
To fix CVE-2021-26120, upgrade Smarty to version 3.1.39 or later.
What causes CVE-2021-26120?
CVE-2021-26120 is caused by an insufficiently validated function name in Smarty templates that allows for code injection.
Which versions of Smarty are affected by CVE-2021-26120?
Smarty versions prior to 3.1.39 are affected by CVE-2021-26120.
Is there a way to mitigate CVE-2021-26120 without upgrading?
Mitigating CVE-2021-26120 without upgrading is challenging; it is recommended to implement strict validation of user inputs in templates.
- collector/friends-of-php
- collector/security-tracker-debian
- agent/type
- agent/first-publish-date
- collector/github-advisory-latest
- source/GitHub
- alias/GHSA-3rpf-5rqv-689q
- alias/CVE-2021-26120
- agent/software-canonical-lookup
- agent/severity
- agent/references
- agent/weakness
- agent/remedy
- agent/description
- agent/author
- collector/github-advisory
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/event
- agent/trending
- agent/source
- agent/softwarecombine
- agent/tags
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup-request
- collector/nvd-index
- package-manager/composer
- package-manager/debian
- vendor/smarty
- canonical/smarty
- vendor/debian
- canonical/debian
- version/debian/9.0
- version/debian/10.0
- version/debian/11.0