CVE-2021-29454

NameCVE-2021-29454
DescriptionSmarty 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-2995-1, DSA-5151-1
Debian Bugs1010375

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
smarty3 (PTS)stretch3.1.31+20161214.1.c7d42e4+selfpack1-2+deb9u1vulnerable
stretch (security)3.1.31+20161214.1.c7d42e4+selfpack1-2+deb9u6fixed
buster3.1.33+20180830.1.3a78a21f+selfpack1-1vulnerable
buster (security)3.1.33+20180830.1.3a78a21f+selfpack1-1+deb10u1fixed
bullseye3.1.39-1vulnerable
bullseye (security)3.1.39-2+deb11u1fixed
bookworm, sid3.1.45-1fixed
smarty4 (PTS)bookworm, sid4.1.1-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
smarty3sourcestretch3.1.31+20161214.1.c7d42e4+selfpack1-2+deb9u5DLA-2995-1
smarty3sourcebuster3.1.33+20180830.1.3a78a21f+selfpack1-1+deb10u1DSA-5151-1
smarty3sourcebullseye3.1.39-2+deb11u1DSA-5151-1
smarty3source(unstable)3.1.45-1
smarty4source(unstable)4.1.1-11010375

Notes

https://github.com/smarty-php/smarty/security/advisories/GHSA-29gp-2c3m-3j6m
https://github.com/smarty-php/smarty/commit/215d81a9fa3cd63d82fb3ab56ecaf97cf1e7db71 (v4.0.2)
https://github.com/smarty-php/smarty/commit/7ad97ad030b4289711e30819c928b8bc33c62b23 (v3.1.42)

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