Vulnerability identifier: #VU25103
Vulnerability risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-22
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Rack CORS Middleware
Other software /
Other software solutions
Vendor: Calvin Yu
Description
The vulnerability allows a remote attacker to perform directory traversal attacks.
The vulnerability exists due to resource matching does not ensure that pathnames are in a canonical format when processing directory traversal sequences. A remote attacker can send a specially crafted HTTP request and read arbitrary files on the system.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Rack CORS Middleware: 0.1.0 - 1.0.3
External links
http://github.com/cyu/rack-cors/commit/e4d4fc362a4315808927011cbe5afcfe5486f17d
http://github.com/cyu/rack-cors/compare/v1.0.3...v1.0.4
http://lists.debian.org/debian-lts-announce/2020/02/msg00004.html
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.