#VU14123 Path traversal in ZNC - CVE-2018-14056

Vulnerability identifier: #VU14123

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-14056

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
ZNC
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: ZNC

Description

The vulnerability allows a remote attacker to obtain potentially sensitive information on the target system.

The vulnerability exists due to path traversal flaw when handling malicious input passed via ../ in a web skin name. A remote unauthenticated attacker can supply specially crafted input to  access files outside of the intended skins directories.

Mitigation
Update to version 1.7.1.

Vulnerable software versions

ZNC: 1.0 - 1.7.0

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External links
https://github.com/znc/znc/commit/a4a5aeeb17d32937d8c7d743dae9a4cc755ce773

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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.