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Vulnerability Details : CVE-2021-41270

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 `@`.
Publish Date : 2021-11-24 Last Update Date : 2021-12-15
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- CVSS Scores & Vulnerability Types

CVSS Score
4.0
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact None (There is no impact to the availability of the system.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication ???
Gained Access None
Vulnerability Type(s)
CWE ID 1236

- Products Affected By CVE-2021-41270

# Product Type Vendor Product Version Update Edition Language
1 OS Fedoraproject Fedora 34 * * * Version Details Vulnerabilities
2 OS Fedoraproject Fedora 35 * * * Version Details Vulnerabilities
3 Application Sensiolabs Symfony * * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Fedoraproject Fedora 2
Sensiolabs Symfony 1

- References For CVE-2021-41270

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QSREFD2TJT5LWKM6S4MD3W26NQQ5WJUP/
FEDORA FEDORA-2021-0294e8ca24
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3BPT4SF6SIXFMZARDWED5T32J7JEH3EP/
FEDORA FEDORA-2021-10fd47b32d
https://github.com/symfony/symfony/commit/3da6f2d45e7536ccb2a26f52fbaf340917e208a8
https://github.com/symfony/symfony/pull/44243
https://github.com/symfony/symfony/releases/tag/v5.3.12
https://github.com/symfony/symfony/security/advisories/GHSA-2xhg-w2g5-w95x CONFIRM

- Metasploit Modules Related To CVE-2021-41270

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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