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CVE-2019-18888

Date: November 21, 2019

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).

Language: PHP

Severity Score

Related Resources (19)

https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2019-18888.yaml
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UED22BOXTL2SSFMGYKA64ZFHGLLJG3EA/
https://symfony.com/blog/symfony-4-3-8-released
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DZNXRVHDQBNZQUCNRVZICPPBFRAUWUJX
https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/http-foundation/CVE-2019-18888.yaml
https://nvd.nist.gov/vuln/detail/CVE-2019-18888
https://security-tracker.debian.org/tracker/CVE-2019-18888
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VXEAOEANNIVYANTMOJ42NKSU6BGNBULZ
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UED22BOXTL2SSFMGYKA64ZFHGLLJG3EA
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VXEAOEANNIVYANTMOJ42NKSU6BGNBULZ/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DZNXRVHDQBNZQUCNRVZICPPBFRAUWUJX
https://symfony.com/cve-2019-18888
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DZNXRVHDQBNZQUCNRVZICPPBFRAUWUJX/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VXEAOEANNIVYANTMOJ42NKSU6BGNBULZ
https://symfony.com/blog/cve-2019-18888-prevent-argument-injection-in-a-mimetypeguesser
https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/mime/CVE-2019-18888.yaml
https://github.com/symfony/symfony/releases/tag/v4.3.8
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UED22BOXTL2SSFMGYKA64ZFHGLLJG3EA
https://www.mend.io/vulnerability-database/CVE-2019-18888

Severity Score

Weakness Type (CWE)

Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')

CWE-88

Improper Input Validation

CWE-20

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): HIGH
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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