What is CVE-2021-34829?

CVE-2021-34829 is a high-severity vulnerability in D-Link Dap-1330, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2021-07-15.

How severe is CVE-2021-34829?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in D-Link Dap-1330

CVE-2021-34829

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DAP-1330 1.13B01 BETA routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of the HNAP_AUTH HTTP header. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length buffer. An attacker can leverage this vulnerability to execute code in the context of the device. Was ZDI-CAN-12065.

Vulnerability class: Buffer Overflow

EPSS: 0.023 (81.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

D-link Dap-1330 — versions 1.13B01 BETA
Dlink Dap-1330
Dlink Dap-1330_firmware — versions 1.13b01

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

zdi-disclosures@trendmicro.com (VDB Entry, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-34829?: CVE-2021-34829 is a high-severity vulnerability in D-Link Dap-1330, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2021-07-15.
How severe is CVE-2021-34829?: High severity. CVSS v3 base score is 8.8 out of 10.