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CVE-2019-18888

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Argument injection in a MimeTypeGuesser in Symfony

High severity GitHub Reviewed PublishedDec 2, 2019 to the GitHub Advisory Database • UpdatedFeb 1, 2024

Package

composersymfony/http-foundation (Composer)

Affected versions

>= 2.0.0, < 2.8.52
>= 3.0.0, < 3.4.35
>= 4.0.0, < 4.2.12
>= 4.3.0, < 4.3.8

Patched versions

2.8.52
3.4.35
4.2.12
4.3.8
composersymfony/mime (Composer)
>= 4.3.0, < 4.3.8
4.3.8
composersymfony/symfony (Composer)
>= 2.0.0, < 2.8.52
>= 3.0.0, < 3.4.35
>= 4.0.0, < 4.2.12
>= 4.3.0, < 4.3.8
2.8.52
3.4.35
4.2.12
4.3.8

Description

An issue was discovered in Symfony 2.8.0 through 2.8.50, 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7. If an application passes unvalidated user input as the file for which MIME type validation should occur, then arbitrary arguments are passed to the underlying file command. This is related to symfony/http-foundation (and symfony/mime in 4.3.x).

References

Published by theNational Vulnerability DatabaseNov 21, 2019
ReviewedDec 1, 2019
Published to the GitHub Advisory DatabaseDec 2, 2019
Last updatedFeb 1, 2024

Severity

High

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
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
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:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided byFIRST.
(85th percentile)

Weaknesses

CVE ID

CVE-2019-18888

GHSA ID

GHSA-xhh6-956q-4q69

Source code

No known source code
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