Vulnerabilities > CVE-2021-41270 - Improper Neutralization of Formula Elements in a CSV File vulnerability in multiple products

CVSS 6.5 - MEDIUM

Attack vector

NETWORK

Attack complexity

LOW

Privileges required

LOW

Confidentiality impact

HIGH

Integrity impact

NONE

Availability impact

NONE

network

low complexity

sensiolabs

fedoraproject

CWE-1236

NVD

Published: 2021-11-24

Updated: 2023-11-07

Summary

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 `@`.

Vulnerable Configurations

Part	Description	Count
Application	Sensiolabs Sensiolabs Symfony 5.0.0 Sensiolabs Symfony 5.0.1 Sensiolabs Symfony 5.0.2 Sensiolabs Symfony 5.0.3 Sensiolabs Symfony 5.0.4 Sensiolabs Symfony 5.0.5 Sensiolabs Symfony 5.0.6 Sensiolabs Symfony 5.0.7 Sensiolabs Symfony 5.0.8 Sensiolabs Symfony 5.0.9 Sensiolabs Symfony 5.0.10 Sensiolabs Symfony 5.0.11 Sensiolabs Symfony 5.1.0 Sensiolabs Symfony 5.1.1 Sensiolabs Symfony 5.1.2 Sensiolabs Symfony 5.1.3 Sensiolabs Symfony 5.1.4 Sensiolabs Symfony 5.1.5 Sensiolabs Symfony 5.1.6 Sensiolabs Symfony 5.1.7 Sensiolabs Symfony 5.1.8 Sensiolabs Symfony 5.1.9 Sensiolabs Symfony 5.1.10 Sensiolabs Symfony 5.1.11 Sensiolabs Symfony 5.2.0 Sensiolabs Symfony 5.2.1 Sensiolabs Symfony 5.2.2 Sensiolabs Symfony 5.2.3 Sensiolabs Symfony 5.2.4 Sensiolabs Symfony 5.2.5 Sensiolabs Symfony 5.2.6 Sensiolabs Symfony 5.2.7 Sensiolabs Symfony 5.2.8 Sensiolabs Symfony 5.2.9 Sensiolabs Symfony 5.3.0 Sensiolabs Symfony 5.3.1 Sensiolabs Symfony 5.3.2 Sensiolabs Symfony 5.3.3 Sensiolabs Symfony 5.3.4 Sensiolabs Symfony 5.3.5 Sensiolabs Symfony 5.3.6 Sensiolabs Symfony 5.3.7 Sensiolabs Symfony 5.3.8 Sensiolabs Symfony 5.3.9 Sensiolabs Symfony 5.3.10 Sensiolabs Symfony 5.3.11 Sensiolabs Symfony 4.1.0 Sensiolabs Symfony 4.1.1 Sensiolabs Symfony 4.1.2 Sensiolabs Symfony 4.1.3 Sensiolabs Symfony 4.1.4 Sensiolabs Symfony 4.1.5 Sensiolabs Symfony 4.1.6 Sensiolabs Symfony 4.1.7 Sensiolabs Symfony 4.1.8 Sensiolabs Symfony 4.1.9 Sensiolabs Symfony 4.1.10 Sensiolabs Symfony 4.1.11 Sensiolabs Symfony 4.1.12 Sensiolabs Symfony 4.1.13 Sensiolabs Symfony 4.2.0 Sensiolabs Symfony 4.2.1 Sensiolabs Symfony 4.2.2 Sensiolabs Symfony 4.2.3 Sensiolabs Symfony 4.2.4 Sensiolabs Symfony 4.2.5 Sensiolabs Symfony 4.2.6 Sensiolabs Symfony 4.2.7 Sensiolabs Symfony 4.2.8 Sensiolabs Symfony 4.2.9 Sensiolabs Symfony 4.2.10 Sensiolabs Symfony 4.2.11 Sensiolabs Symfony 4.2.12 Sensiolabs Symfony 4.3.0 Sensiolabs Symfony 4.3.1 Sensiolabs Symfony 4.3.2 Sensiolabs Symfony 4.3.3 Sensiolabs Symfony 4.3.4 Sensiolabs Symfony 4.3.5 Sensiolabs Symfony 4.3.6 Sensiolabs Symfony 4.3.7 Sensiolabs Symfony 4.3.8 Sensiolabs Symfony 4.3.9 Sensiolabs Symfony 4.3.10 Sensiolabs Symfony 4.3.11 Sensiolabs Symfony 4.4.0 Sensiolabs Symfony 4.4.1 Sensiolabs Symfony 4.4.2 Sensiolabs Symfony 4.4.3 Sensiolabs Symfony 4.4.4 Sensiolabs Symfony 4.4.5 Sensiolabs Symfony 4.4.6 Sensiolabs Symfony 4.4.7 Sensiolabs Symfony 4.4.8 Sensiolabs Symfony 4.4.9 Sensiolabs Symfony 4.4.10 Sensiolabs Symfony 4.4.11 Sensiolabs Symfony 4.4.12 Sensiolabs Symfony 4.4.13 Sensiolabs Symfony 4.4.14 Sensiolabs Symfony 4.4.15 Sensiolabs Symfony 4.4.16 Sensiolabs Symfony 4.4.17 Sensiolabs Symfony 4.4.18 Sensiolabs Symfony 4.4.19 Sensiolabs Symfony 4.4.20 Sensiolabs Symfony 4.4.21 Sensiolabs Symfony 4.4.22 Sensiolabs Symfony 4.4.23 Sensiolabs Symfony 4.4.24 Sensiolabs Symfony 4.4.25 Sensiolabs Symfony 4.4.26 Sensiolabs Symfony 4.4.27 Sensiolabs Symfony 4.4.28 Sensiolabs Symfony 4.4.29 Sensiolabs Symfony 4.4.30 Sensiolabs Symfony 4.4.31 Sensiolabs Symfony 4.4.32 Sensiolabs Symfony 4.4.33 Sensiolabs Symfony 4.4.34	149
OS	Fedoraproject Fedoraproject Fedora 34 Fedoraproject Fedora 35	2

Common Weakness Enumeration (CWE)

CWE-1236 - Improper Neutralization of Formula Elements in a CSV File

Summary

Vulnerable Configurations

Common Weakness Enumeration (CWE)

References