PT-2022-11894 · D Link · D-Link Dir-645

Polaris · Published 2022-03-31 · Updated 2022-04-08 · CVE-2021-43722

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 DIR-645 version 1.03 A1

Description The issue is related to a Buffer Overflow. The hnap main function in the cgibin handler uses sprintf to format the soapaction header onto the stack and has no limit on the size.

Recommendations For D-Link DIR-645 version 1.03 A1, as a temporary workaround, consider restricting access to the cgibin handler until a patch is available. Avoid using the soapaction header in the affected API endpoint until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2021-43722

Affected Products

D-Link Dir-645

References · 6

• 🔥 https://github.com/luqiut/iot/blob/main/DIR-645%20Stack%20overflow.md · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-43722 · Security Note
• https://dlink.com/en/security-bulletin · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-43722 · Vendor Advisory
• https://t.me/cibsecurity/39943 · Telegram Post
• https://t.me/cvenotify/28237 · Telegram Post