#VU22852 OS Command Injection in Symfony - CVE-2019-18888

Vulnerability identifier: #VU22852

Vulnerability risk: Medium

CVSSv4.0: 6.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-18888

CWE-ID: CWE-78

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Symfony
Web applications / CMS

Vendor: SensioLabs

Description

The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.

The vulnerability exists in MimeTypeGuesser within the Symfony HttpFoundation component when parsing data passed via the $path variable. A remote attacker can with ability to upload files can execute arbitrary OS commands on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Symfony: 2.8.0 - 4.3.7

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External links
https://symfony.com/blog/cve-2019-18888-prevent-argument-injection-in-a-mimetypeguesser

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.