CVE-2021-41270 - CERT CVE
ID CVE-2021-41270
Sažetak 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 `@`.
Reference
CVSS
Base: 4.0
Impact: 2.9
Exploitability:8.0
Pristup
VektorSloženostAutentikacija
NETWORK LOW SINGLE
Impact
PovjerljivostCjelovitostDostupnost
PARTIAL NONE NONE
CVSS vektor AV:N/AC:L/Au:S/C:P/I:N/A:N
Zadnje važnije ažuriranje 07-11-2023 - 03:38
Objavljeno 24-11-2021 - 19:15