PT-2021-18163 · D Link · D-Link Dir-825

Zyw · Published 2021-08-10 · Updated 2024-08-03 · CVE-2021-29296

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: D-Link DIR-825 version 2.10b02

Description: The issue is a Null Pointer Dereference vulnerability that could allow a remote malicious user to cause a denial of service. This can be triggered by sending an HTTP request with the URL /vct wan, which causes the sbin/httpd to invoke the strchr function with NULL as the first argument, leading to a segmentation fault.

Recommendations: For D-Link DIR-825 version 2.10b02, since the device is considered End of Life and the issue will not be patched, consider replacing the device with a supported model to mitigate the risk of exploitation. As a temporary workaround, restrict access to the /vct wan URL to minimize the risk of denial of service attacks.

Fix

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2021-29296

Affected Products

D-Link Dir-825

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2021-29296 · Security Note
• https://dlink.com/en/security-bulletin · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-29296 · Vendor Advisory
• https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10212 · Vendor Advisory
• https://t.me/cibsecurity/27106 · Telegram Post
• https://t.me/cvenotify/19041 · Telegram Post