CVE-2021-41270
Description
Symfony/Serializer handles serializing and deserializing data structures for Symfony, a PHP framework for web and console applications and a set of reusable PHP components. Symfony versions 4.1.0 before 4.4.35 and versions 5.0.0 before 5.3.12 are vulnerable to CSV injection, also known as formula injection. In Symfony 4.1, maintainers added the opt-in csv_escape_formulas option in the CsvEncoder, to prefix all cells starting with =, +, - or @ with a tab \t. Since then, OWASP added 2 chars in that list: Tab (0x09) and Carriage return (0x0D). This makes the previous prefix char (Tab \t) part of the vulnerable characters, and OWASP suggests using the single quote ' for prefixing the value. Starting with versions 4.4.34 and 5.3.12, Symfony now follows the OWASP recommendations and uses the single quote ' to prefix formulas and add the prefix to cells starting by \t, \r as well as =, +, - and @.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
symfony/serializerPackagist | >= 5.0.0, < 5.3.12 | 5.3.12 |
symfony/serializerPackagist | >= 4.1.0, < 4.4.35 | 4.4.35 |
symfony/symfonyPackagist | >= 4.1.0, < 4.4.35 | 4.4.35 |
symfony/symfonyPackagist | >= 5.0.0, < 5.3.12 | 5.3.12 |
Affected products
7cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*range: >=4.1.0,<4.4.35
- (no CPE)range: >= 4.1.0, < 4.4.35
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
- osv-coords3 versions
>= 4.1.0, < 4.4.35+ 2 more
- (no CPE)range: >= 4.1.0, < 4.4.35
- (no CPE)range: >= 5.0.0, < 5.3.12
- (no CPE)range: >= 4.1.0, < 4.4.35
Patches
Vulnerability mechanics
References
15- github.com/symfony/symfony/commit/3da6f2d45e7536ccb2a26f52fbaf340917e208a8nvdPatchThird Party AdvisoryWEB
- github.com/symfony/symfony/pull/44243nvdPatchThird Party AdvisoryWEB
- github.com/symfony/symfony/security/advisories/GHSA-2xhg-w2g5-w95xnvdPatchThird Party AdvisoryWEB
- github.com/advisories/GHSA-2xhg-w2g5-w95xghsaADVISORY
- github.com/symfony/symfony/releases/tag/v5.3.12nvdRelease NotesThird Party AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2021-41270ghsaADVISORY
- github.com/FriendsOfPHP/security-advisories/blob/master/symfony/serializer/CVE-2021-41270.yamlghsaWEB
- github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2021-41270.yamlghsaWEB
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3BPT4SF6SIXFMZARDWED5T32J7JEH3EPghsaWEB
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QSREFD2TJT5LWKM6S4MD3W26NQQ5WJUPghsaWEB
- lists.fedoraproject.org/archives/list/[email protected]/message/3BPT4SF6SIXFMZARDWED5T32J7JEH3EPghsaWEB
- lists.fedoraproject.org/archives/list/[email protected]/message/QSREFD2TJT5LWKM6S4MD3W26NQQ5WJUPghsaWEB
- symfony.com/cve-2021-41270ghsaWEB
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3BPT4SF6SIXFMZARDWED5T32J7JEH3EP/nvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QSREFD2TJT5LWKM6S4MD3W26NQQ5WJUP/nvd
News mentions
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