PT-2020-16820 · Lede+1 · Uhttpd+1

Chung96Vn · Published 2020-12-15 · Updated 2021-03-25 · CVE-2020-27865

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions D-Link DAP-1860 firmware version 1.04B03

Description This issue allows network-adjacent attackers to execute arbitrary code on affected installations. Authentication is not required to exploit this issue. The specific flaw exists within the uhttpd service, which listens on TCP port 80 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this issue to escalate privileges and execute code in the context of the device.

Recommendations For D-Link DAP-1860 firmware version 1.04B03, as a temporary workaround, consider disabling the uhttpd service until a patch is available. Restrict access to TCP port 80 to minimize the risk of exploitation. Avoid accessing protected pages using the affected uhttpd service until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this issue.

Fix

Improper Authentication

Authentication Bypass Using an Alternate Path or Channel

Weakness Enumeration

CWE-287

CWE-288

Related Identifiers

CVE-2020-27865

ZDI-20-1429

Affected Products

D-Link Dap-1860

Uhttpd

References · 5

• https://osv.dev/vulnerability/CVE-2020-27865 · Vendor Advisory
• https://zerodayinitiative.com/advisories/ZDI-20-1429 · Security Note
• https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10197 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-27865 · Security Note
• https://t.me/cvenotify/9839 · Telegram Post