Staging Environment: Content and features may be unstable or change without notice.
Advisory details: github_osv / GHSA-xhh6-956q-4q69
Advisory ID github_osv/GHSA-xhh6-956q-4q69
Aliases CVE-2019-18888
Summary Argument injection in a MimeTypeGuesser in Symfony 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).
Status Published
Exploitability 0.5
Weighted Severity 6.8
Risk 3.4
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (2)
CWE-20 Improper Input Validation
CWE-88 Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
System Score Found at
cvssv3.1 7.5 https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2019/12/GHSA-xhh6-956q-4q69/GHSA-xhh6-956q-4q69.json
generic_textual HIGH
Reference id Reference type URL
https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/http-foundation/CVE-2019-18888.yaml
https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/mime/CVE-2019-18888.yaml
https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/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/DZNXRVHDQBNZQUCNRVZICPPBFRAUWUJX
https://lists.fedoraproject.org/archives/list/package-announce%40lists.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://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UED22BOXTL2SSFMGYKA64ZFHGLLJG3EA
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://symfony.com/blog/symfony-4-3-8-released
CVE-2019-18888 https://nvd.nist.gov/vuln/detail/CVE-2019-18888
CVE-2019-18888 https://symfony.com/cve-2019-18888
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2019/12/GHSA-xhh6-956q-4q69/GHSA-xhh6-956q-4q69.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none

There are no SSVC decisions available.