Vulnerability identifier: #VU27296

Vulnerability 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-2020-1757

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Undertow
Server applications / Web servers

Vendor: Red Hat Inc.

Description

The vulnerability allows a remote attacker to bypass security restrictions.

The vulnerability exists due to insufficient validation of user-supplied input in Servlet container that causes the servletPath to incorrectly normalize data by truncating the path after semicolon. A remote attacker can pass specially crafted input to the application and bypass security restrictions

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Undertow: 1.0.0 - 2.0.30

---

External links
http://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1757

---

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.