PT-2021-6099 · D Link · D-Link Dir-878

Published 2021-12-13 · Updated 2022-07-12 · CVE-2021-44882

Positive Technologies (AI Summary)

CVSS v2.0

10

Critical

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions D-Link DIR-878 versions prior to the fixed version

Description The issue is related to the implementation of the twsystem() function in the D-Link DIR-878 wireless router's firmware, which fails to neutralize special elements used in operating system commands. This allows a remote attacker to execute arbitrary commands by sending specially crafted HNAP1 POST requests to the / API endpoint, potentially via the HNAP1 protocol.

Recommendations For D-Link DIR-878 versions prior to the fixed version: update to the latest firmware version to resolve the issue. As a temporary workaround, consider restricting access to the twsystem() function until a patch is available. Avoid using the HNAP1 protocol in the affected API endpoint until the issue is resolved.

Exploit

Fix

OS Command Injection

Command Injection

Weakness Enumeration

CWE-78

CWE-77

Related Identifiers

BDU:2022-00770

CVE-2021-44882

Affected Products

D-Link Dir-878

References · 6

• 🔥❌ https://github.com/pjqwudi/my_vuln/blob/main/D-link/vuln_1/1.md · Exploit, Deleted
• https://dlink.com/en/security-bulletin · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-44882 · Security Note
• https://bdu.fstec.ru/vul/2022-00770 · Security Note
• https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10286 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-44882 · Vendor Advisory