#VU26052 Path traversal in Undertow - CVE-2020-1745

Vulnerability identifier: #VU26052

Vulnerability risk: High

CVSSv4.0: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:A/U:Amber]

CVE-ID: CVE-2020-1745

CWE-ID: CWE-22

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 perform directory traversal attacks.

The vulnerability exists due to input validation error in AJP connector. A remote attacker can send a specially crafted HTTP request to port 8009/tcp and read arbitrary files on the system.

Note, this vulnerability can lead to system compromise.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Undertow: 2.0.0.Alpha1 - 2.0.29

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External links
https://access.redhat.com/errata/RHSA-2020:0812
https://access.redhat.com/security/cve/CVE-2020-1745

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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. However, a fully functional exploit for this vulnerability is available.