#VU16216 Path traversal in Zyxel VMG1312-B10D - CVE-2018-19326

Vulnerability identifier: #VU16216

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-2018-19326

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Zyxel VMG1312-B10D
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: ZyXEL Communications Corp.

Description

The vulnerability allows a remote attacker to conduct directory traversal attack on the target system.

The vulnerability exists due to path traversal, as demonstrated by reading /etc/passwd. A remote unauthenticated attacker can send a specially crafted URL request containing "dot dot" sequences (/../), conduct directory traversal attack and view arbitrary files.

Mitigation
Update to version 5.13(AAXA.8)C0.

Vulnerable software versions

Zyxel VMG1312-B10D: before 5.13(AAXA.8)C0

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External links
https://gist.github.com/numanturle/4988b5583e5ebe501059bd368636de33

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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.