CVE-2021-34203

CVSS V2 Medium 4.8 CVSS V3 High 8.1
Description
D-Link DIR-2640-US 1.01B04 is vulnerable to Incorrect Access Control. Router ac2600 (dir-2640-us), when setting PPPoE, will start quagga process in the way of whole network monitoring, and this function uses the original default password and port. An attacker can easily use telnet to log in, modify routing information, monitor the traffic of all devices under the router, hijack DNS and phishing attacks. In addition, this interface is likely to be questioned by customers as a backdoor, because the interface should not be exposed.
Overview
  • CVE ID
  • CVE-2021-34203
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-06-16T20:15:07
  • Last Modified Date
  • 2022-07-12T17:42:04
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
AND
cpe:2.3:o:dlink:dir-2640-us_firmware:1.01b04:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:dlink:dir-2640-us:-:*:*:*:*:*:*:* 0 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:A/AC:L/Au:N/C:P/I:P/A:N
  • Access Vector
  • ADJACENT_NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • PARTIAL
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • NONE
  • Base Score
  • 4.8
  • Severity
  • MEDIUM
  • Exploitability Score
  • 6.5
  • Impact Score
  • 4.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
  • Attack Vector
  • ADJACENT_NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • NONE
  • Base Score
  • 8.1
  • Base Severity
  • HIGH
  • Exploitability Score
  • 2.8
  • Impact Score
  • 5.2
References
Reference URL Reference Tags
https://www.dlink.com/en/security-bulletin/ Vendor Advisory
http://d-link.com Vendor Advisory
http://dir-2640-us.com Broken Link
https://github.com/liyansong2018/CVE/tree/main/2021/CVE-2021-34203 Exploit Third Party Advisory
History
Created Old Value New Value Data Type Notes
2022-05-10 07:09:59 Added to TrackCVE
2022-12-05 04:34:16 2021-06-16T20:15Z 2021-06-16T20:15:07 CVE Published Date updated
2022-12-05 04:34:16 2022-07-12T17:42:04 CVE Modified Date updated
2022-12-05 04:34:16 Analyzed Vulnerability Status updated