Information Exposure Through an Error Message in Symfony

1) Information Exposure Through an Error Message

EUVDB-ID: #VU26531

Risk: Low

CVSSv4.0: 0.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-5274

CWE-ID: CWE-209 - Information Exposure Through an Error Message

Exploit availability: No

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

CPE2.3

• cpe:2.3:a:sensiolabs:symfony:4.4.0:*:*:*:*:*:*:*
• cpe:2.3:a:sensiolabs:symfony:4.4.1:*:*:*:*:*:*:*
• cpe:2.3:a:sensiolabs:symfony:4.4.2:*:*:*:*:*:*:*

External links

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

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.