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Incorrect response from Validator when input ends with `\n`

Low
nicolas-grekas published GHSA-g3rh-rrhp-jhh9 Nov 6, 2024

Package

composer symfony/validator (Composer)

Affected versions

<5.4.43
>6, <6.4.11
>7, <7.1.4

Patched versions

5.4.43
6.4.11
7.1.4

Description

Description

It is possible to trick a Validator configured with a regular expression using the $ metacharacters, with an input ending with \n.

Resolution

Symfony now uses the D regex modifier to match the entire input.

The patch for this issue is available here for branch 5.4.

Credits

We would like to thank Offscript for reporting the issue and Alexandre Daubois for providing the fix.

Severity

Low

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

CVE ID

CVE-2024-50343

Weaknesses

No CWEs

Credits