PT-2023-3441 · Tp Link · Tp-Link Tl-Wr940N

Published 2023-06-20 · Updated 2023-07-04 · CVE-2023-36355

Positive Technologies (AI Summary)

CVSS v3.1

9.9

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions TP-Link TL-WR940N version V4

Description The issue is related to a buffer overflow in the WanDynamicIpV6CfgRpm component when handling the ipStart parameter. This can be exploited by sending a specially crafted GET request to the "/userRpm/WanDynamicIpV6CfgRpm.htm" endpoint, potentially allowing a remote attacker to cause a Denial of Service (DoS).

Recommendations For TP-Link TL-WR940N version V4, as a temporary workaround, consider restricting access to the "/userRpm/WanDynamicIpV6CfgRpm.htm" endpoint to minimize the risk of exploitation. Avoid using the ipStart parameter 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

Improper Resource Release

Buffer Overflow

Weakness Enumeration

CWE-404

CWE-120

Related Identifiers

BDU:2023-03623

CVE-2023-36355

Affected Products

Tp-Link Tl-Wr940N

References · 7

• 🔥 https://github.com/a101e-IoTvul/iotvul/blob/main/tp-link/9/TP-Link%20TL-WR940N%20wireless%20router%20userRpmWanDynamicIpV6CfgRpm%20buffer%20write%20out-of-bounds%20vulnerability.md · Exploit
• 🔥 https://exploit-db.com/exploits/51561 · Exploit
• https://bdu.fstec.ru/vul/2023-03623 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-36355 · Security Note
• https://vuldb.com/ru/?id.232195 · Note
• http://packetstormsecurity.com/files/173294/TP-Link-TL-WR940N-4-Buffer-Overflow.html · Note
• https://t.me/cvenotify/52897 · Telegram Post