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cvelistZdiCVELIST:CVE-2022-43636
HistoryMar 29, 2023 - 12:00 a.m.

CVE-2022-43636

2023-03-2900:00:00
CWE-330
zdi
www.cve.org
vulnerability
authentication bypass
tp-link tl-wr940n
httpd service
tcp port 80
session management
zdi-can-18334

7.5 High

CVSS3

Attack Vector

ADJACENT

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

9 High

AI Score

Confidence

High

0.0005 Low

EPSS

Percentile

16.4%

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.

CNA Affected

[
  {
    "vendor": "TP-Link",
    "product": "TL-WR940N",
    "versions": [
      {
        "version": "6_211111 3.20.1(US)",
        "status": "affected"
      }
    ]
  }
]

7.5 High

CVSS3

Attack Vector

ADJACENT

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

9 High

AI Score

Confidence

High

0.0005 Low

EPSS

Percentile

16.4%

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