Vulnerability Name:

CVE-2018-18489 (CCN-161827)

Assigned:2018-10-18
Published:2019-02-01
Updated:2020-08-24
Summary:The ping feature in the Diagnostic functionality on TP-LINK WR840N v2 Firmware 3.16.9 Build 150701 Rel.51516n devices allows remote attackers to cause a denial of service (HTTP service termination) by modifying the packet size to be higher than the UI limit of 1472.
CVSS v3 Severity:4.9 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H)
4.3 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H/E:U/RL:U/RC:R)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
4.7 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:U/RC:R)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Low
CVSS v2 Severity:6.8 Medium (CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
Vulnerability Type:CWE-noinfo
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2018-18489

Source: XF
Type: UNKNOWN
tplink-cve201818489-dos(161827)

Source: CCN
Type: TP-LINK Web site
WR840N devices

Source: CCN
Type: YouTube Web site
DoS | TP Link 300M Wireless N Router | Model No. TL-WR840N / TL-WR840ND

Source: MISC
Type: Exploit, Third Party Advisory
https://youtu.be/VGNEYWR9MgY

Vulnerable Configuration:Configuration 1:
  • cpe:/o:tp-link:wr840n_firmware:3.16.9:*:*:*:*:*:*:*
  • AND
  • cpe:/h:tp-link:wr840n:2:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    tp-link wr840n firmware 3.16.9
    tp-link wr840n 2