Auth bypass in Totolink A3002ru
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 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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.296 (98.1th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 98.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.296 · newest: 0.296 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- sploit.tech (Exploit, Third Party Advisory)
- seclists.org/fulldisclosure/2020/Jan/36 (mailing-list, Mailing List, Third Party Advisory)
- packetstormsecurity.com/files/156083/Realtek-SDK-Information-Disclosure-Code-Ex… (VDB Entry, Third Party Advisory)
- seclists.org/fulldisclosure/2020/Jan/38 (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-19825?
- CVE-2019-19825 is a critical-severity vulnerability in Totolink A3002ru, classified under Improper Authentication. CVSS score: 9.8/10. Published 2020-01-27.
- How severe is CVE-2019-19825?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2019-19825 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.