PT-2024-3676 · Tenda · Tenda I21

Yhryhryhr_Tu · Published 2024-04-26 · Updated 2024-06-04 · CVE-2024-4251

Positive Technologies (AI Summary)

CVSS v2.0

9.0

High

Base vector

AV:N/AC:L/Au:S/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Tenda i21 version 1.0.0.14(4656)

Description A critical issue exists in the fromDhcpSetSer function of the /goform/DhcpSetSe file, caused by a stack-based buffer overflow when handling the dhcpStartIp, dhcpEndIp, dhcpGw, dhcpMask, dhcpLeaseTime, dhcpDns1, and dhcpDns2 arguments. This can be exploited remotely, potentially impacting the confidentiality, integrity, and availability of protected information.

Recommendations For Tenda i21 version 1.0.0.14(4656), as a temporary workaround, consider disabling the fromDhcpSetSer function until a patch is available. Restrict access to the /goform/DhcpSetSe file to minimize the risk of exploitation. Avoid using the dhcpStartIp, dhcpEndIp, dhcpGw, dhcpMask, dhcpLeaseTime, dhcpDns1, and dhcpDns2 arguments 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

Stack Overflow

Weakness Enumeration

CWE-787

CWE-121

Related Identifiers

BDU:2024-04020

CVE-2024-4251

Affected Products

Tenda I21

References · 8

• 🔥 https://github.com/abcdefg-png/IoT-vulnerable/blob/main/Tenda/i/i21/fromDhcpSetSer.md · Exploit
• https://bdu.fstec.ru/vul/2024-04020 · Security Note
• https://osv.dev/vulnerability/CVE-2024-4251 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-4251 · Security Note
• https://vuldb.com/?ctiid.262142 · Note
• https://t.me/cvenotify/78249 · Telegram Post
• https://vuldb.com/?submit.319836 · Note
• https://vuldb.com/?id.262142 · Note