Path traversal in znc (Alpine package)

Published: 2018-05-17

Risk	Low
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2018-14056
CWE-ID	CWE-22
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	znc (Alpine package) Operating systems & Components / Operating system package or component
Vendor	Alpine Linux Development Team

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Path traversal

EUVDB-ID: #VU14123

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 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

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

Install update from vendor's website.

Vulnerable software versions

znc (Alpine package): 1.4-r0 - 1.7.0-r0

CPE2.3

External links

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.