PT-2023-4465 · D Link · D-Link Dir-842+1

Published 2023-08-17 · Updated 2023-08-25 · CVE-2023-39666

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-842 version fw revA 1-02 eu multi 20151008 D-Link DIR-880 version A1

Description The issue is related to buffer overflow errors in the fgets function of the D-Link DIR-880 and DIR-842 firmware. This can be exploited by a remote attacker to execute arbitrary code. The vulnerability is specifically related to the acStack 120 and acStack 220 parameters.

Recommendations For D-Link DIR-842 version fw revA 1-02 eu multi 20151008, consider disabling the fgets function until a patch is available. For D-Link DIR-880 version A1, restrict access to the vulnerable acStack 120 and acStack 220 parameters to minimize the risk of exploitation. As a temporary workaround, avoid using the acStack 120 and acStack 220 parameters in the affected API endpoint until the issue is resolved.

Fix

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

BDU:2023-04860

CVE-2023-39666

Affected Products

D-Link Dir-842

D-Link Dir-880L

References · 9

• https://dlink.com/en/security-bulletin · Vendor Advisory
• https://support.dlink.com · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-04860 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-39666 · Security Note
• https://osv.dev/vulnerability/CVE-2023-39666 · Vendor Advisory
• https://twitter.com/VulmonFeeds/status/1692411195402141824 · Twitter Post
• https://twitter.com/CVEnew/status/1692369005317603393 · Twitter Post
• ❌ https://github.com/Davidteeri/Bug-Report/blob/main/D-Link/DIR-842%20buffer%20overflow.md · Note, Deleted
• https://t.me/cvenotify/56829 · Telegram Post