#VU84037 Path traversal in Reactor Netty - CVE-2023-34062

Vulnerability identifier: #VU84037

Vulnerability risk: Medium

CVSSv4.0: 6.6 [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:U/U:Green]

CVE-ID: CVE-2023-34062

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Reactor Netty
Universal components / Libraries / Libraries used by multiple products

Vendor: Pivotal

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences. A remote attacker can send a specially crafted HTTP request and read arbitrary files on the system.

Successful exploitation of the vulnerability requires that Reactor Netty HTTP Server is configured to serve static resources.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Reactor Netty: 1.0.0-M1 - 1.0.38, 1.1.0 - 1.1.12

---

External links
https://spring.io/security/cve-2023-34062

---

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.