Security restrictions bypass in Gin-Gonic CORS

1) Input validation error

EUVDB-ID: #VU97957

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-25211

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to incorrect handling of the wildcard character in the URL within parseWildcardRules, which can lead to security restrictions bypass.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

CORS: 1.0 - 1.5.0

CPE2.3

• cpe:2.3:a:gin-gonic:cors:1.5.0:*:*:*:*:*:*:*
• cpe:2.3:a:gin-gonic:cors:1.4.0:*:*:*:*:*:*:*
• cpe:2.3:a:gin-gonic:cors:1.3.1:*:*:*:*:*:*:*

External links

http://github.com/gin-contrib/cors/pull/57
http://github.com/gin-contrib/cors/pull/106
http://github.com/gin-contrib/cors/compare/v1.5.0...v1.6.0
http://github.com/gin-contrib/cors/releases/tag/v1.6.0
http://github.com/gin-contrib/cors/commit/27b723a473efd80d5a498fa9f5933c80204c850d

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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