CVE-2022-43636 — HIGH (8.8)

Vulnerability Description

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of TP-Link TL-WR940N 6_211111 3.20.1(US) routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the httpd service, which listens on TCP port 80 by default. The issue results from the lack of sufficient randomness in the sequnce numbers used for session managment. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-18334.

CVSS Score

8.8

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Tp-Link	Tl-Wr940N Firmware	6_211111_3.20.1
Tp-Link	Tl-Wr940N	-

Related Weaknesses (CWE)

CWE-330

References

https://www.zerodayinitiative.com/advisories/ZDI-22-1614/Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-1614/Third Party AdvisoryVDB Entry

FAQ

What is CVE-2022-43636?

CVE-2022-43636 is a vulnerability with a CVSS score of 8.8 (HIGH). This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of TP-Link TL-WR940N 6_211111 3.20.1(US) routers. Authentication is not required to exploit this...

How severe is CVE-2022-43636?

CVE-2022-43636 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2022-43636?

Check the references section above for vendor advisories and patch information. Affected products include: Tp-Link Tl-Wr940N Firmware, Tp-Link Tl-Wr940N.