PT-2021-22677 · D Link · D-Link Dvg-3104Ms

Daniel Nussko · Published 2021-08-23 · Updated 2024-08-04 · CVE-2021-39613

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions: D-Link DVG-3104MS versions 1.0.2.0.3 through 1.0.2.0.4E

Description: The issue concerns hard-coded credentials for undocumented user accounts in the '/etc/passwd' file. Weak passwords have been used, allowing plaintext passwords to be recovered from the hash values. This issue only affects products that are no longer supported by the maintainer.

Recommendations: For D-Link DVG-3104MS versions 1.0.2.0.3 through 1.0.2.0.4E, consider changing the hard-coded credentials and passwords to stronger ones to minimize the risk of exploitation. As a temporary workaround, restrict access to the '/etc/passwd' file until a more permanent solution can be applied. 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-2021-39613

Affected Products

D-Link Dvg-3104Ms

References · 9

• 🔥 https://nussko.com/advisories/advisory-2021-08-01.txt · Exploit
• https://dlink.com/en/security-bulletin · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-39613 · Vendor Advisory
• https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10237 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-39613 · Security Note
• https://t.me/cvenotify/19958 · Telegram Post
• https://t.me/cvenotify/88894 · Telegram Post
• https://t.me/cvenotify/87927 · Telegram Post
• https://t.me/cibsecurity/27753 · Telegram Post