Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2019-19825

Severity CVSS v4.0:
Pending analysis
Type:
CWE-287 Authentication Issues
Publication date:
27/01/2020
Last modified:
05/02/2020

Description

On certain TOTOLINK Realtek SDK based routers, the CAPTCHA text can be retrieved via an {"topicurl":"setting/getSanvas"} POST to the boafrm/formLogin URI, leading to a CAPTCHA bypass. (Also, the CAPTCHA text is not needed once the attacker has determined valid credentials. The attacker can perform router actions via HTTP requests with Basic Authentication.) This affects A3002RU through 2.0.0, A702R through 2.1.3, N301RT through 2.1.6, N302R through 3.4.0, N300RT through 3.4.0, N200RE through 4.0.0, N150RT through 3.4.0, and N100RE through 3.4.0.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 9.80 CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
9.80
Severity 3.x
CRITICAL
Vector 2.0
AV:N/AC:L/Au:N/C:P/I:P/A:P CVSS v2.0 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): Physical
Availability (A): Physical

Base Score 2.0
7.50
Severity 2.0
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:totolink:a3002ru_firmware:*:*:*:*:*:*:*:* 2.0.0 (including)
cpe:2.3:h:totolink:a3002ru:-:*:*:*:*:*:*:*
cpe:2.3:o:totolink:a702r_firmware:*:*:*:*:*:*:*:* 2.1.3 (including)
cpe:2.3:h:totolink:a702r:-:*:*:*:*:*:*:*
cpe:2.3:o:totolink:n301rt_firmware:*:*:*:*:*:*:*:* 2.1.6 (including)
cpe:2.3:h:totolink:n301rt:-:*:*:*:*:*:*:*
cpe:2.3:o:totolink:n302r_firmware:*:*:*:*:*:*:*:* 3.4.0 (including)
cpe:2.3:h:totolink:n302r:-:*:*:*:*:*:*:*
cpe:2.3:o:totolink:n300rt_firmware:*:*:*:*:*:*:*:* 3.4.0 (including)
cpe:2.3:h:totolink:n300rt:-:*:*:*:*:*:*:*
cpe:2.3:o:totolink:n200re_firmware:*:*:*:*:*:*:*:* 4.0.0 (including)
cpe:2.3:h:totolink:n200re:-:*:*:*:*:*:*:*
cpe:2.3:o:totolink:n150rt_firmware:*:*:*:*:*:*:*:* 3.4.0 (including)
cpe:2.3:h:totolink:n150rt:-:*:*:*:*:*:*:*
cpe:2.3:o:totolink:n100re_firmware:*:*:*:*:*:*:*:* 3.4.0 (including)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools