Vulnerability identifier: #VU26531

Vulnerability risk: Low

CVSSv3.1: 2.7 [CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-5274

CWE-ID: CWE-209

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Symfony
Web applications / CMS

Vendor: SensioLabs

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to some properties of the Exception are not properly escaped when the "ErrorHandler" renderes it stacktrace. A remote authenticated attacker can gain unauthorized access to sensitive information on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Symfony: 4.4.0 - 5.0.3

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External links
http://github.com/symfony/symfony/commit/629d21b800a15dc649fb0ae9ed7cd9211e7e45db
http://github.com/symfony/symfony/commit/cf80224589ac05402d4f72f5ddf80900ec94d5ad
http://github.com/symfony/symfony/security/advisories/GHSA-m884-279h-32v2

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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.