PT-2022-11658 · Tenda · Tenda Ac9

Published 2022-05-24 · Updated 2022-07-12 · CVE-2021-42659

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Tenda AC9 V1.0 V15.03.02.19(6318) Tenda AC9 V3.0 V15.03.06.42 multi

Description There is a buffer overflow issue in the Web server httpd of Tenda router devices. This occurs when setting the virtual service and a super-long list parameter is provided, causing the httpd program to crash and exit.

Recommendations For Tenda AC9 V1.0 V15.03.02.19(6318), consider disabling the virtual service feature until a patch is available. For Tenda AC9 V3.0 V15.03.06.42 multi, restrict access to the httpd program to minimize the risk of exploitation. As a temporary workaround, avoid using super-long list parameters when setting the virtual service.

Exploit

Fix

Buffer Overflow

Weakness Enumeration

CWE-119

Related Identifiers

CVE-2021-42659

Affected Products

Tenda Ac9

References · 6

• 🔥 https://github.com/Lyc-heng/routers/blob/main/routers/stack4.md · Exploit
• https://osv.dev/vulnerability/CVE-2021-42659 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-42659 · Security Note
• https://cnvd.org.cn/flaw/show/CNVD-2021-24948 · Note
• https://t.me/cibsecurity/43240 · Telegram Post
• https://t.me/cvenotify/30621 · Telegram Post