Critical severity · published Jan 27, 2020
CVE-2019-19825
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…
9.8
CVSS
29.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)29.6% · higher than 98% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AF
A3002ru Firmware · Totolink
through 2.0.0 · source: NVD
AF
A702r Firmware · Totolink
through 2.1.3 · source: NVD
NF
N100re Firmware · Totolink
through 3.4.0 · source: NVD
NF
N150rt Firmware · Totolink
through 3.4.0 · source: NVD
NF
N200re Firmware · Totolink
through 4.0.0 · source: NVD
NF
N300rt Firmware · Totolink
through 3.4.0 · source: NVD
NF
N301rt Firmware · Totolink
through 2.1.6 · source: NVD
NF
N302r Firmware · Totolink
through 3.4.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-19825
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-19825
Third Party Advisory
http://packetstormsecurity.com/files/156083/Realtek-SDK-Information-Disclosure-Code-Execution.html
Mailing List
http://seclists.org/fulldisclosure/2020/Jan/36
Mailing List
http://seclists.org/fulldisclosure/2020/Jan/38
Exploit
https://sploit.tech
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