PT-2021-13789 · D Link · D-Link Dir-2640

Olivia Fraser · Published 2021-12-30 · Updated 2022-01-12 · CVE-2021-20132

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 DIR-2640 versions less than or equal to 1.11B02

Description: The issue allows a remote attacker to gain administrative access to the zebra or ripd services, which are running with root privileges on the router. This is due to the use of default hard-coded credentials in Quagga Services. The attacker can access these services as the "admin" user with UID 0.

Recommendations: For D-Link DIR-2640 versions less than or equal to 1.11B02, consider changing the default credentials for the zebra and ripd services to prevent unauthorized access. As a temporary workaround, restrict access to these services until a patch is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Using Hardcoded Credentials

Weakness Enumeration

CWE-798

Related Identifiers

CVE-2021-20132

Affected Products

D-Link Dir-2640

References · 4

• 🔥 https://tenable.com/security/research/tra-2021-44 · Exploit
• https://osv.dev/vulnerability/CVE-2021-20132 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-20132 · Security Note
• https://t.me/cibsecurity/34784 · Telegram Post