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Fatal error in CsvEncoder #54709

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Rudloff opened this issue Apr 23, 2024 · 0 comments
Closed

Fatal error in CsvEncoder #54709

Rudloff opened this issue Apr 23, 2024 · 0 comments
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Bug Serializer Status: Needs Review

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@Rudloff
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Rudloff commented Apr 23, 2024

Symfony version(s) affected

7.0.6

Description

Fuzzing reveals that CsvEncoder throws a fatal error with some values:

PHP Fatal error:  Uncaught TypeError: Cannot access offset of type string on string in /home/pierre/www/fuzzer/vendor/symfony/serializer/Encoder/CsvEncoder.php:179

How to reproduce

Here is the smallest value I was able to reproduce with:

<?php

require __DIR__.'/vendor/autoload.php';

$encoder = new \Symfony\Component\Serializer\Encoder\CsvEncoder();
var_dump($encoder->decode(',.
,', 'csv'));

Possible Solution

No response

Additional Context

I am using php-fuzzer to test various input.
@Rudloff Rudloff added the Bug label Apr 23, 2024
@xabbuh xabbuh mentioned this issue Apr 24, 2024
Merged
@fabpot fabpot closed this as completed May 1, 2024
fabpot added a commit that referenced this issue May 1, 2024
@fabpot
bug #54714 [Serializer] convert empty CSV header names into numeric k…
b3baa36 
…eys (xabbuh)

This PR was merged into the 5.4 branch.

Discussion
----------

[Serializer] convert empty CSV header names into numeric keys

| Q             | A
| ------------- | ---
| Branch?       | 5.4
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Issues        | Fix #54709
| License       | MIT

Commits
-------

93ee57b convert empty CSV header names into numeric keys
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@fabpot @Rudloff @xabbuh @carsonbot