#VU56984 Path traversal in DAP-2020 - CVE-2021-34860

Vulnerability identifier: #VU56984

Vulnerability risk: Low

CVSSv4.0: 4.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-34860

CWE-ID: CWE-22

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
DAP-2020
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: D-Link

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 within the "getpage" parameter. A remote attacker on the local network can send a specially crafted HTTP request and read arbitrary files on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

DAP-2020: 1.01

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External links
https://www.zerodayinitiative.com/advisories/ZDI-21-976/
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10201

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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 local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.